Lead tetraacetate
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Lead tetraacetate
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CAS No:
546-67-8
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Formula:
C2H4O2.1/4Pb
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Chemical Name:
Lead tetraacetate
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Synonyms:
Acetic acid,lead(4+) salt (4:1);Acetic acid,lead(4+) salt;Lead tetraacetate;Lead acetate (Pb(O2C2H3)4);Lead acetate [Pb(OAc)4];Lead(IV) acetate;Plumbic acetate;LTA;Lead(IV) tetraacetate;Lead(4+) acetate;612524-90-0
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CAS No:
Description
White solid Lead tetraacetate (plumbic acetate), Pb(C2H3O2)4, is a colorless, monoclinic crystalline solid that is soluble in chloroform and in hot acetic acid, but decomposes in cold water and in ethyl alcohol. Lead tetraacetate can be prepared by adding warm, water-free, glacial acetate acid to red lead, Pb3O4, and subsequent cooling. The salt decomposes with the addition of water to give PbO2, but the yield can be improved by passing in chlorine gas. Lead tetraacetate is available in laborat
Faintly pink wet crystals with an odor of vinegar. (USCG, 1999)
Faintly pink wet crystals with an odor of vinegar. (USCG, 1999)
Lead tetraacetate Basic Attributes
443.38
444.029816
3595640
208-908-0
CFN24B03DB
2291
DTXSID6041058
Colorless monoclinic prisms from glacial acetic acid|Colorless or faintly pink crystals, sometimes moist with glacial acetic acid
2915299090
Characteristics
105.20000
-0.32560
White to light orange-pink Crystalline Powder
2.228 g/cm3 @ Temp: 17 °C
175 °C
118.1°C
40ºC
H2O: Decomposition
0-6°C
Combustible, the fire emits spicy spicy stimulating smoke
LIKE ACETIC ACID OR VINEGAR
Turns pink easily. Unstable in air. Hydrolyzed by water with the formation of brown lead dioxide and acetic acid. Dissolves in concd halogen acids with the formation of haloplumbic acids, H2PbX6.|Lead is derived from the decay of radon. /Inorganic lead/|Natural lead is a mixture of four stable isotopes: Pb-204 (1.4%), Pb-206 (25.2%), Pb-207 (21.7%) and Pb-208 (51.7%). Lead isotopes are the end-products of each of the three series of naturally occurring radioactive elements: Pb-206 for the uranium series, Pb-207 for the actinium series and Pb-208 for the thorium series. Forty-three other isotopes of lead, all of which are radioactive, are recognized.
Unstable in air. Reacts with water to form brown lead dioxide and acetic acid [Merck 11th ed. 1989].
Oxidizing Agents, Strong
Strong Oxidizing Agent
Lead tetraacetate is a metal carboxylate salt. It is commonly used as an oxidizing agent in organic chemistry.
MAY CORRODE METALS WHEN MOIST
Safety Information
III
6.1
UN 2923 8/PG 2
3
61-8-20/22-33-35-50/53-62
53-45-60-61-36/37/39-26-17
AI5300000
T,N,O
Warehouse low temperature, ventilated, dry
Stable. Moisture sensitive. Incompatible with water, most metals.
P201-P260-P280-P301 + P312 + P330-P308 + P313
H302 + H332-H360Df-H373-H410
Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number D008, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste. /Lead/
Materials to avoid: alcohols, strong acids, strong reducing agents
National Toxicology Program. Eleventh Report on Carcinogens (2005). The Report on Carcinogens is an informational scientific and public health document that identifies and discusses substances (including agents, mixtures, or exposure circumstances) that may pose a carcinogenic hazard to human health. Lead and Lead Compounds are listed as reasonably anticipated to be human carcinogens. /Lead and Lead Compounds/[Available from, as of July 31, 2009: http://ntp.niehs.nih.gov/ntp/roc/eleventh/profiles/s101lead.pdf]
Behavior in Fire: Can increase the intensity of a fire when in contact with combustible material. Cool containers with plenty of water. (USCG, 1999)
|Danger|H302 (94.37%): Harmful if swallowed [Warning Acute toxicity, oral]|P201, P202, P260, P261, P264, P270, P271, P273, P281, P301+P312, P304+P312, P304+P340, P308+P313, P312, P314, P330, P391, P405, and P501|Aggregated GHS information provided by 71 companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H302: Harmful if swallowed [Warning Acute toxicity, oral]|P201, P202, P260, P261, P264, P270, P271, P281, P301+P312, P304+P312, P304+P340, P308+P313, P312, P314, P330, P405, and P501
Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: 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)
Neutralizing Agents for Acids and Caustics: Dilute with water, rinse with dilute sodium bicarbonate or lime solution. (USCG, 1999)
Goggles or face shield; rubber gloves (USCG, 1999)|Wear self contained breathing apparatus for fire fighting if necessary.|Wear appropriate personal protective clothing to prevent skin contact. /Lead/|Wear appropriate eye protection to prevent eye contact. /Lead/|Respirator Recommendations: Up to 0.5 mg/cu m. /Lead/ [Table#1817]|For more Personal Protective Equipment (PPE) (Complete) data for LEAD TETRAACETATE (10 total), please visit the HSDB record page.
Not flammable ... Can increase intensity of fire when in contact with combustible material.
Cool containers with plenty of water.
Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Pick up and arrange disposal without creating dust. Keep in suitable, closed containers for disposal.
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit 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.|SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.|SRP: Contaminated protective clothing should be segregated in a manner so that results in no direct personal contact by personnel who handle, dispose of, or clean the clothing. Quality assurance procedures to confirm the efficacy of the cleaning procedures should be implemented prior to the decontaminated protective clothing being returned for reuse by the workers. Contaminated clothing (including shoes/socks) should not be taken home at end of shift, but should remain at employee's place of work for cleaning.|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.|For more Preventive Measures (Complete) data for LEAD TETRAACETATE (7 total), please visit the HSDB record page.
/GUIDE 151: SUBSTANCES - TOXIC (NON-COMBUSTIBLE)/ Health: Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. /Lead acetate/|/GUIDE 151: SUBSTANCES - TOXIC (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways. /Lead acetate/|/GUIDE 151: SUBSTANCES - TOXIC (NON-COMBUSTIBLE)/ 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 lease 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. /Lead acetate/|/GUIDE 151: SUBSTANCES - TOXIC (NON-COMBUSTIBLE)/ 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. /Lead acetate/|For more DOT Emergency Guidelines (Complete) data for LEAD TETRAACETATE (8 total), please visit the HSDB record page.
Liquid or solid is irritating to skin and eyes.
Blood lead levels of 50-60 ug/100 g in children can cause significant neurobehavioral impairments, and there is evidence of hyperactivity at blood levels as low as 25 ug/100 g. Given the overall body of literature concerning the adverse health effects of lead in children, OSHA feels that the blood level in children should be maintained below 30 ug/100 g with a population mean of 15 ug/100 g. Blood lead levels in the fetus and newborn likewise should not exceed 30 ug/100 g. /Lead/
NIOSH considers "Lead" to mean metallic lead, lead oxides, and lead salts (including organic salts such as lead soaps but excluding lead arsenate).|Recommended Exposure Limit: 10 hr Time-Weighted Avg: 0.050 mg/cu m /Lead/|Air concentrations should be maintained so that worker blood lead remains less than 0.06 mg Pb/100 g of whole blood.
National primary and secondary ambient air quality standards for lead and its compounds, measured as elemental lead by a reference method based on appendix G to this part, or by an equivalent method, are: 1.5 micrograms per cubic meter, maximum arithmetic mean averaged over a calendar quarter. /Lead and its compounds, as Pb/|Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious health problems. The Clean Air Act, as amended in 1990, directs EPA to set standards requiring major sources to sharply reduce routine emissions of toxic pollutants. EPA is required to establish and phase in specific performance based standards for all air emission sources that emit one or more of the listed pollutants. Lead compounds are included on this list. /Lead compounds/
D008; A solid waste containing lead may or may not become characterized as a hazardous waste when subjected to the Toxicity Characteristic Leaching Procedure listed in 40 CFR 261.24, and if so characterized, must be managed as a hazardous waste. /Lead/
D008; A solid waste containing lead may or may not become characterized as a hazardous waste when subjected to the Toxicity Characteristic Leaching Procedure listed in 40 CFR 261.24, and if so characterized, must be managed as a hazardous waste. /Lead/|The Environmental Protection Agency is ... /promulgated/ regulations concerning ground-water monitoring with regard to screening suspected contamination at land based hazardous waste treatment, storage, and disposal facilities. ... /There are/ new requirements to analyze for a specified core list of chemicals plus those chemicals specified by the Regional Administrator on a site-specific basis. ... /Total lead (all species) is included on this list./ /Total lead (all species)/
Toxicity
The usefulness of N-acetylcysteine (NAC) as a chelating agent was studied for ... lead tetraacetate. Mature Sprague-Dawley rats were intoxicated ... and placed in metabolic cages. Urinary excretion rates of intoxicant and total urine volume were determined during treatment with N-acetylcysteine, calcium EDTA, and/or dimercaptosuccinic acid .... Dimercaptosuccinic acid was most effective at the chelation of lead. NAC did not increase the excretion of lead ...
/AQUATIC SPECIES/ Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Drug Information
Early symptoms of lead intoxication by ingestion are most commonly gastrointestinal disorders, colic, constipation, etc.; weakness, which may go on to paralysis chiefly of the extensor muscles of the wrists and less often of the ankles, is noticeable in the most serious cases. Ingestion of a large amount causes local irritation of the alimentary tract; pain, leg cramps, muscle weakness, paresthesias, depression, coma, and death may follow in 1 or 2 days. Contact causes severe irritation of eyes and can burn skin. (USCG, 1999)
Remove at once all cases of lead intoxication from further exposure until the blood level is reduced to a safe value; immediately place the individual under medical care. INGESTION: give gastric lavage using 1% solution of sodium or magnesium sulfate; leave 15-30 gm magnesium sulfate in 6-8 oz. of water in the stomach as antidote and cathartic; egg white, milk, and tannin are useful demulcents; atropine sulfate and other antispasmodics may relieve abdominal pain, but morphine may be necessary. EYES: flush with water for at least 15 min. SKIN: wash contaminated skin with large amounts of water for 15 min. (USCG, 1999)
Immediate first aid: 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 as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on 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. /Lead 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 10 to 15 L/min. Monitor for shock and treat if necessary ... . Anticipate seizures 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 patient can swallow, has a strong gag reflex, and does not drool ... . Administer activated charcoal ... . /Lead and related compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or is in severe respiratory distress. Moderate hyperventilation (20 respiration per minute) may be beneficial for increased intracranial pressure. Start IV administration of 0.9% saline (NS) or lactated Ringer's (LR) /SRP: "To keep open", minimal flow rate/. For hypotension ... . Treat seizures with diazepam or lorazepam ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Lead and related compounds/|Treatment. Emergency and supportive measures. Treat seizures and coma if they occur. Provide adequate fluids to maintain urine flow but avoid overhydration, which may aggravate cerebral edema. Avoid phenothiazines for delirium , as they may lower the seizure threshold. Patients with increased intracranial pressure may benefit from corticosteroids and mannitol. /Lead/|For more Antidote and Emergency Treatment (Complete) data for LEAD TETRAACETATE (6 total), please visit the HSDB record page.
lead tetraacetate
Lead tetraacetate Use and Manufacturing
Prepd from Pb3O4 and glacial acetic acid preferably in the presence of some acetic anhydride; ... Prepn by electrolysis.[The Merck Index, Fourteenth Edition (2006)|... Prepared by adding warm, anhydrous, glacial acetic acid to red lead (Pb3O4) and subsequently cooling the solution.
Selective oxidizing agent in organic syntheses:Criegee, Angew. Chem. 53, 321 (1940); Newer Methods of Preparative Organic Chemistry (Interscience, N. Y., 1948) pp 1-17.
Grades: Commercial, 80-90%.|Colorless to faintly pink crystals stored in glacial acetic acid.
Acetic acid, lead(4+) salt (4:1): ACTIVE
Computed Properties
Molecular Weight:443
Hydrogen Bond Acceptor Count:8
Exact Mass:444.02987
Monoisotopic Mass:444.02987
Topological Polar Surface Area:161
Heavy Atom Count:17
Formal Charge:-2
Complexity:25.5
Covalently-Bonded Unit Count:5
Compound Is Canonicalized:Yes
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