Calcium oxide

56.07740

55.95750

215-138-9

0409

1910

DTXSID5029631

Grey-white, cubic crystals|Colorless, cubic, white crystals|Crystals, white or grayish white lumps, or granular powder|Greyish-yellow, hydroscopic lumps

2825909000

17.07000

-0.11880

Calcium oxide appears as an odorless, white or gray-white solid in the form of hard lumps. A strong irritant to skin, eyes and mucous membranes. Used in insecticides and fertilizers.

3.3-3.4 g/cm³

2572 °C

2850 °C

2850ºC

1.83

Reacts

Store at RT.

0 mmHg (approx)

Noncombustible Solid, but will support combustion by liberation of oxygen.

No explosive propertiy

Odorless

SATURATED SOLN IN WATER IS ABOUT 12.8

Crumbles on exposure to moist air|Commercial grade is usually yellowish or brownish tint, due to iron|Readily absorbs CO2 and H2O from air, becoming air-slaked.|A powerful caustic to living tissue. The powdered oxide may react explosively with water.

Crumbles on exposure to moist air. Reacts with water to form corrosive calcium hydroxide, with evolution of much heat. Temperatures as high as 800° C have been reached with addition of water (moisture in air or soil). The heat of this reaction has caused ignition of neighboring quantities of sulfur, gunpowder, wood, and straw [Mellor 3: 673 1946-47].

Bases, Strong

Water-Reactive

A base and an oxidizing agent. Neutralizes acids with generation of heat. Nonflammable, but will support combustion by liberation of oxygen, especially in the presence of organic materials. Reacts very violently with liquid hydrofluoric acid [Mellor 2, Supp. 1:129 1956]. Reacts extremely violently with phosphorus pentaoxide when reaction is initiated by local heating [Mellor 8 Supp.3:406 1971].

Not flammable (USCG, 1999)

Noncombustible Solid, but will support combustion by liberation of oxygen.

Corrosive

III

8

UN 1910

1

R34

S25-S26-S36/37/39-S45

EW3100000

C

Separated from strong acids, organic chemicals, water and food and feedstuffs. Dry.

Stability Stable, but absorbs carbon dioxide from the air. Incompatible with water, moisture, fluorine, strong acids.

P261-P280-P305 + P351 + P338

H315-H318-H335

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal and plant life; and conformance with environmental and public health regulations.|SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.|... May be disposed of in sealed containers in secured sanitary landfill.

Addn of water to quicklime has generated temp as high as 800 °C. Some reports describe reaction as violent. Ignition of sulfur, gunpowder, wood, and straw by heat of quicklime-water reaction has been reported.|Even when cold, fluorine will attack calcium oxide, evolving much heat and some light.|Chlorine trifluoride reacts violently, producing flame, with...calcium oxide.|Liquid hydrofluoric acid and calcium oxide react very violently.|For more Hazardous Reactivities and Incompatibilities (Complete) data for CALCIUM OXIDE (13 total), please visit the HSDB record page.

Substance added directly to human food affirmed as generally recognized as safe (GRAS).|Calcium oxide used as a nutrient and/or dietary supplement in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

Optimal Calcium Uptake. Current Bibliographies in Medicine 94-4. Public Services Division/National Library of Medicine. 775 citations from January, 1990-April, 1994.[Available from, as of April 4, 2003: http://www.nlm.nih.gov/pubs/cbm/calcium.html]

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. For UN1796, UN1826, UN2031 at high concentrations and for UN2032, these may act as oxidizers, also consult ERG Guide 140. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Substance may react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. (ERG, 2016)|Not combustible.|Corrosives, Reactive - 1st degree

|Danger|H302 (19.45%): Harmful if swallowed [Warning Acute toxicity, oral]|P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P362, P363, P403+P233, P405, and P501|Aggregated GHS information provided by 2515 companies from 58 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H315: Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P362, P403+P233, P405, and P501|H303: May be harmful if swallowed [Warning Acute toxicity, oral]|P260, P264, P270, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P307+P311, P309+P311, P310, P312, P314, P321, P331, P363, P405, and P501

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 157 [Substances - Toxic and/or Corrosive (Non-Combustible / Water-Sensitive)]: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. A vapor-suppressing foam may be used to reduce vapors. DO NOT GET WATER INSIDE CONTAINERS. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Prevent entry into waterways, sewers, basements or confined areas. SMALL SPILL: Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Use clean, non-sparking tools to collect material and place it into loosely covered plastic containers for later disposal. (ERG, 2016)

Skin: Wear appropriate personal protective clothing to prevent skin contact. Eyes: Wear appropriate eye protection to prevent eye contact. Wash skin: The worker should immediately wash the skin when it becomes contaminated. The worker should wash daily at the end of each work shift. Remove: Work clothing that becomes wet or significantly contaminated should be removed and replaced. Change: Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premise. Provide: Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection. Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.] (NIOSH, 2016)|Protective gloves, goggles, and any type of respirator prescribed for fine dust.|Wear appropriate personal protective clothing to prevent skin contact.|Wear appropriate eye protection to prevent eye contact.|Eyewash fountains should be provided in areas where there is any possbility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection.|For more Personal Protective Equipment (PPE) (Complete) data for CALCIUM OXIDE (10 total), please visit the HSDB record page.|(See protection codes)

Not combustible, but bulk powder may heat spontaneously when damp with water.

No explosive propertiy

Extinguish fire using agent suitable for surrounding fire. Use flooding quantities of water as spray. DO NOT use carbon dioxide or halogenated extinguishing agents.|If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Do not use water on material itself. Keep run-off out of sewers and water sources. Use foam, dry chemical, or carbon dioxide.|In case of fire in the surroundings, use appropriate extinguishing media.|Inhalation: Fresh air, rest. Refer for medical attention.|For more Fire Fighting Procedures (Complete) data for CALCIUM OXIDE (7 total), please visit the HSDB record page.

1) Ventilate area of spill. 2) Collect spilled material in most convenient and safe manner and deposit in sealed containers for reclamation or for disposal in secured sanitary landfill.|Environmental considerations: Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete.|Environmental considerations: Water spill: Use natural barriers or oil spill control booms to limit spill travel. Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. Remove trapped material with suction hoses.|Shovel into suitable dry container. Use water spray to control dust, protect personnel.|Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered dry containers.

SRP: The scientific literature for the use of contact lenses by industrial workers is inconsistent. The benefits or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.|Dust sources /in industry/ should be enclosed ... Enclosures should ... be fitted with exhaust ventilation ... Air contaminated with lime dust should be passed through cyclones or bag filters before release into general atmosphere; in case of hot lime dust, cyclones and scrubbers should be employed. Settled lime dust inside premises should be collected by industrial vacuum cleaners ... manual collection should be prohibited. Ventilation in vicinity of furnaces should be designed to extract ... dust and gases.|The worker should immediately wash the skin when it becomes contaminated.|The worker should wash daily at the end of each work shift, and prior to eating, drinking, smoking, etc.|For more Preventive Measures (Complete) data for CALCIUM OXIDE (13 total), please visit the HSDB record page.

/GUIDE 157: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE/WATER -SENSITIVE)/ Health: TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns, or death. Reaction with water or moist air may release toxic, corrosive or flammable gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.|/GUIDE 157: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE/WATER -SENSITIVE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. For Un1796, UN1826, UN2031 at high concentrations and for UN2032, these may act as oxidizers, also consult GUIDE 140. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance may react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.|/GUIDE 157: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE/WATER -SENSITIVE)/ Public Safety: CALL Emergency Response Telephone Number ... As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas.|/GUIDE 157: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE/WATER -SENSITIVE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.|For more DOT Emergency Guidelines (Complete) data for CALCIUM OXIDE (8 total), please visit the HSDB record page.

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that person is registered in conformance ... and the hazardous material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./|The International Air Transport Association (IATA) Dangerous Goods Regulations are published by the IATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual of industry carrier regulations to be followed by all IATA Member airlines when transporting hazardous materials.

CaO may produce irritation when contact with the skin is repeated or extended.|Eye irritation: highly irritating, Risk of serious damage to eyes. /human/|Irritating to skin, eyes, and respiratory system.

Permissible Exposure Limit: Table Z-1 8-hr Time Weighted Avg: 5 mg/cu m.

Recommended Exposure Limit: 10 Hour Time-Weighted Average: 2 mg/cu m.

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered dry containers.

Separated from strong acids, organic chemicals, water and food and feedstuffs. Dry.

Evaporation at 20 °C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

The substance is corrosive to the eyes, skin and respiratory tract. The effects may be delayed. Medical observation is indicated.

Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged inhalation of dust particles may cause effects on the lungs. Repeated or prolonged inhalation may cause nasal ulceration. This may result in perforation of the nasal septum.

PREVENT DISPERSION OF DUST! STRICT HYGIENE!

Use local exhaust or breathing protection.

Protective gloves. Protective clothing.

Wear safety goggles or eye protection in combination with breathing protection.

| 3 - Materials that, under emergency conditions, can cause serious or permanent injury.| 0 - Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand.| 1 - Materials that in themselves are normally stable but that can become unstable at elevated temperatures and pressures.

Betel quid chewing is a general oral habit in Taiwan, India, southeastern Asian and South Africa with or without the additive of tobacco, alcohol or lime. In this study, the tumor-promoting neoplastic transformation effect of Lime-Piper betel quid (LPB) was examined on JB6 cells. The treatment of LPB at a high dose (1.0 mg/mL) for over 5 days or at lower doses (0.1, 0.5 mg/mL) for over 15 days induced the formation of transformed foci. The transformed cells showed the characteristics of colony formation in soft agar, higher growth rate and multilayer on culture dish. A two-fold induction of the protein levels of c-fos and c-jun proto-oncogenes was observed in the cells from the 50th passage (Cl1/p50, Cl2/p50 and Cl3/p50), suggesting that LPB-transformed cells were oncogenic. In addition, the LPB-transformed cells possessed an elevated level of c-Myc and an increased cell population distributed in the S phase of the cell cycle. These results demonstrated the promotion effect of LPB and indicate that it could be a tumor promoter. Lime-piper betel quid/|Static bioassays of 96 hr duration were conducted in the laboratory using fry of common carp (Cyprinus carpio), adult tubificid worm (Branchiura sowerbyi) and adult copepod plankton (Cyclops viridis) to determine LC50 values of Cu and CaO to these organisms and effects of interaction between Cu and CaO. Ninety-six hour LC(50) values of Cu to fry of common carp, worm and copepod were found to be 1.40 mg/L, 0.08 mg/L and 0.03 mg/L respectively. CaO up to 500 mg/L did not produce any mortality of the fry of common carp up to 96 hr. But 96 hr LC50 values of CaO to worm and copepod were 83.00 mg/L and 27.80 mg/L respectively. When common carp fry, worm and the copepod were exposed to respective LC50 dose of Cu in presence of varying concentration of CaO, mortality of the organisms significantly reduced and was found inversely correlated with the doses of CaO [y = 48.36-0.807x, r = -0.99 (n = 7) for fish; y = 44.46-0.146x, r = -0.97 (n = 7) for worm; y = 49.46-0.66x, r = -0.99 (n = 7) for the copepod]. The present results indicate that CaO is non-toxic to fish and is capable of reducing the toxicity of Cu to fish while CaO and Cu are antagonistic to each other for the worm and the copepod. Potential of using CaO as antitoxic agent for Cu in water is discussed.|96-hr LC50 values of cadmium (Cd) to fish Labeo rohita and the copepod Diaptomus forbesi, determined by static bioassays, were, respectively, 89.5 and 10.2 mg/L. LC50 values increased significantly when fish pre-exposed to 100-350 mg/L CaO or 0.5-1.5 mg/L KMnO4 for 4 d and the copepod to 20-70 mg/L CaO or 0.25-1.0 mg/L KMnO4 for same period. The LC50 values also increased when the pre-exposure period of CaO was increased to 12 d at concentration 100 mg/L for fish and 20 mg/L for copepod. All fish died when pre-exposed to 1.5 mg/L KMnO4 for 8 d. But LC50 values of Cd to copepod increased when pre-exposure period of 0.5 mg/L KMnO4 was increased from 4 to 8 d.

/AQUATIC SPECIES/ In aqueous suspension the substance (Calcium oxide) react basic and have a toxic effect on fish.|/OTHER TERRESTRIAL SPECIES/ The Puchuncavi Valley in central Chile has been exposed to atmospheric depositions from a copper smelter. Nowadays, soils in the surrounding area are acidic and contaminated with Cu and As. The objective of this study was to determine the effectiveness of lime and compost for in situ immobilization of trace elements in the soils of the Puchuncavi Valley by using earthworms as bioindicators of toxicity. The lime and compost treatments significantly increased soil pH and decreased the soluble and exchangeable Zn, exchangeable Cu, and free Cu(2+) activity. However, the compost treatment increased soluble Cu, and soluble and exchangeable As. Lime application had no effect on earthworm reproduction in comparison with the unamended control, whereas the application of compost increased cocoon and juvenile production. There was a spatial variability of soil properties within treatments in the field plots. This allowed the identification of which soil properties were actually having an impact on earthworm reproduction. For both cocoon and juvenile production, soil organic matter (SOM) was a positive factor, i.e., more SOM increased cocoon or juvenile production. The toxicity (negative) factor was total soil As. However, total Cu and total As were well correlated (R(2)=0.80, p<0.001), hence some of the trends could have been masked. In summary, compost treatment was effective in improving the quality of soils of Puchuncav Valley, increasing earthworm reproduction. Future Chilean legislation on maximum permissible concentrations of trace elements in soils should consider SOM content due to its effect on trace element solubility and bioavailability.

According to the 2006 TSCA Inventory Update Reporting data, the number of persons reasonably likely to be exposed in the industrial manufacturing, processing, and use of calcium oxide is 1000 or greater; the data may be greatly underestimated(1).|NIOSH (NOES Survey 1981-1983) has statistically estimated that 726,694 workers (71,652 of these were female) were potentially exposed to calcium oxide in the US(1). Occupational exposure to calcium oxide may occur through inhalation of dust and dermal contact with this compound at workplaces where calcium oxide is produced or used(SRC).|During lime production, workers may be exposed to atmospheric dust, /&/ the prodn of hazardous gases ... Dust is hazard in ... manual crushing, screening, drying, packaging & loading of lime itself, to builders, plasterers, agricultural workers ... using pure lime & in use & handling of materials of which lime is a component such as basic slag, cement or calcium cyanamide.

Materials used in the production of dental bases, restorations, impressions, prostheses, etc. (See all compounds classified as Dental Materials.)

Calcium carbonate; magnesium, iron, and aluminum oxides.|Grades of purity: 96-97%

Causes burns on mucous membrane and skin. Inhalation of dust causes sneezing. (USCG, 1999)

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Skin: If this chemical contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. Get medical attention promptly. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. Swallow: If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2016)|(See procedures)

Fresh air, rest. Refer for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Immediate first aid: Remove patient from contact with the material. Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on the left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Inorganic Bases/Alkaline Corrosives and Related Compounds/|Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 6 to 12 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patent can swallow, has a strong gag reflex, and does not drool ... . Do not attempt to neutralize. Cover skin burns with dry sterile dressings after decontamination ... . /Inorganic Bases/Alkaline Corrosives and Related Compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Early intubation, at the first signs of upper airway obstruction, may be necessary. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if patient is hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Inorganic Bases/Alkaline Corrosives and Related Compounds/

/SIGNS AND SYMPTOMS/ Industrial experience has shown calcium oxide to be very irritating to mucous membranes and moist skin as a result of local liberation of heat and dehydration of tissues upon slaking of the small size particles and the resulting alkalinity of the slaked product. Inflammation of respiratory passages and ulceration and perforation of the nasal septum have been attributed to inhalation of lime dust. Major complaints of workers exposed to lime consist of eye and skin irritation.|/SIGNS AND SYMPTOMS/ Calcium oxide dust irritates the eyes and upper respiratory tract primarily because of its alkalinity. Inflammation of the respiratory passages, ulceration and perforation of the nasal septum, and pneumonia have been attributed to inhalation of calcium oxide dust.|/SIGNS AND SYMPTOMS/ ... Strong nasal irritation occurred as a consequence of exposure to a mixture of dusts containing calcium oxide in the range of 25 mg/cu m ...|/SIGNS AND SYMPTOMS/ Burning sensation. Abdominal pain. Abdominal cramps. Vomiting. Diarrhoea.|For more Human Toxicity Excerpts (Complete) data for CALCIUM OXIDE (15 total), please visit the HSDB record page.

calcia

The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.|inhalation, ingestion, skin and/or eye contact

irritation eyes, skin, upper resp tract; ulcer, perforation nasal septum; pneumonitis; dermatitis

Burning sensation. Cough. Shortness of breath. Sore throat.

Dry skin. Redness. Skin burns. Burning sensation. Pain.

Redness. Pain. Blurred vision. Severe deep burns.

Eyes, skin, respiratory system

46% Is used in metallurgy, princply as a flux in steel prodn; 13% for ammonia recovery in the solvay process for sodium carbonate; 8% in construction applications, incl finishing and masons lime and in soil stabilization; 7% in water purification and softening; 5% in beet and cane sugar refining; 5% in kraft paper pulp prodn; 3% in the treatment of sewage and trade waste; 2% as a raw material for glass; and 11% in other, misc applications (1973)

Properly stored lime of commerce contains 90-95% free calcium oxide.|Grades: Technical; refractory; agricultural, FCC.|Cold-Ster (Positive Impact Waste Solutions, LLC): Active ingredient: calcium oxide 86.8%.

Adhesive manufacturing|Calcium oxide (CaO): ACTIVE|Like other high-melting solids (tungsten, zirconia, carbon ) lime (CaO) becomes incandescent when heated to near its mp (2500 °C). Of both historical and etymological interest is the use of lime as an illuminant in stage lighting for some years before the advent of electricity (1850-1880). Invented in 1816, this technique involved an oxyhydrogen flame impinging on a cylinder of lime, causing it to emit a brilliant white light that was concentrated to a beam by a lens. The light was powerful enough to spotlight actors or simulate sunshine. It became known in theatrical circles as limelight.|Temperature and moisture responsive smart textile. US 20080057809 A1

Food additives|Fire Hazards -> Corrosives, Reactive - 1st degree|Cosmetics -> Buffering

Food Additives -> ACIDITY_REGULATOR; FLOUR_TREATMENT_AGENT; YEAST_FOOD;