Phosphorus pentoxide

141.94500

141.92200

615-868-1

0545

1807

DTXSID9047754

/There are/ several crystalline & amorphous modifications; commercial form, hexagonal|White, orthogonal crystals|Exists in several forms but is often referred to by its empirical formula P2O5. Three crystalline polymorphs (H, O, O'), two distinct liquids,and several amorphous or glassy solids are recognized. The best-characterized form is the H (hexagonal) or alpha modification that consists of P4O10 molecules.

2809100000

145.79000

1.1788

White to yellow crystalline powder

2.30 g/cm³

562 °C

500 °C @ Press: 550 Torr

340-360°C

1.433-1.436

soluble in sulfuric acid. Insoluble in acetone and ammonia. Decomposes in water.Readily absorbs moisture from the air forming a syrup of meta-, pyro-, and orthophosphoric acids. Reacts violently with water releasing considerable heat [Oldbury Chemicals, p. 9].

Storage Room low temperature ventilation drying ,Separate storage of caustic soda and flammable materials

1 mm Hg ( 384 °C)

4.9 (vs air)

Non-combustible. But encountering water and organic materials such as wood, cotton or straw, it reacts violently to release heat, may cause a fire.

Very deliquescent. Readily absorbs moisture from the air. Exothermic hydrolysis by water to form phosphoric acid. The reaction with alcohol is similar.|Heat of formation: -365.83 kcal/mole. Specific heat: 0.170 cal/g/ °C. Heat of fusion: 8.2 kcal/mole.|Sublimation temperature 360 °C.|Most important chemical property is its avidity for water. Below 100 °C, it is one of the most dehydrating agents known, extracting water from substances that are considered good dehydrating agents. For example it converts pure HNO3 to N2O5, H2SO4 to SO3, dehydrates amides to nitriles, reacts with alcohols to produce esters of simple and polymeric phosphoric acids, and effects ring closures and other condensation reactions.|For more Other Experimental Properties (Complete) data for PHOSPHORUS PENTOXIDE (6 total), please visit the HSDB record page.

Readily absorbs moisture from the air forming a syrup of meta-, pyro-, and orthophosphoric acids. Reacts violently with water releasing considerable heat [Oldbury Chemicals, p. 9]. There is a possibility that this very rapid, exothermic reaction would create a toxic acidic mist in a spill of the chemical into water.

Anhydrides

Water-Reactive

PHOSPHORIC ANHYDRIDE reacts violently and exothermically with water. The heat can ignite surrounding or admixed combustible materials. Undergoes hazardous or violent reactions with metal hydroxides and oxides, formic acid, hydrogen fluoride and hydrofluoric acid, iodides, metals (in particular potassium and sodium), oxidizing agents (bromine pentafluoride, chlorine trifluoride, perchloric acid, oxygen difluoride, hydrogen peroxide), ammonia, and proparygl alcohol. [Bretherick, 5th ed., 1995, p. 1781; EPA, 1998]. A violent explosion occurs if a solution of perchloric acid in chloroform is poured over phosphorus pentaoxide [EPA, 1998].

Corrosive

22.7 kcal/mole of P4O10

II

8

UN 1807 8/PG 2

1

R35

S22-S26-S45

TH3945000

C

Stability Stable, but reacts violently with water, alcohols, metals, sodium, potassium, ammonia, oxidizing agents, HF, peroxides, magnesium, strong bases.

P280-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338

H314

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

CALCIUM OXIDE OR SODIUM HYDROXIDE REACTS WITH PHOSPHORUS PENTOXIDE EXTREMELY VIOLENTLY WHEN INITIATED BY LOCAL HEATING.|CHLORINE TRIFLUORIDE PRODUCES A VIOLENT REACTION WITHOUT FLAME IN PRESENCE OF...PHOSPHORUS PENTOXIDE...|IT IS FAIRLY EASY TO PRODUCE DANGEROUS ANHYDROUS PERCHLORIC ACID FROM EITHER ITS SALTS OR ITS AQUEOUS SOLN BY HEATING WITH HIGH BOILING ACIDS & DEHYDRATING AGENTS SUCH AS...PHOSPHORUS PENTOXIDE.|ADDITION OF PHOSPHORUS PENTOXIDE TO PROPARGYL ALCOHOL CAUSED THE ALCOHOL TO BURST INTO FLAME.|For more Hazardous Reactivities and Incompatibilities (Complete) data for PHOSPHORUS PENTOXIDE (6 total), please visit the HSDB record page.

MARTIN EE; DEVELOPMENT DOCUMENT FOR EFFLUENT LIMITATIONS GUIDELINES AND NEW SOURCE PERFORMANCE STANDARDS FOR PHOSPHORUS DERIVED CHEMICALS SEGMENT OF THE PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY; US NTIS, PB REP: 158 PAGES (1974) ISS 241018. A STUDY WAS MADE OF THE PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY FOR THE PURPOSE OF DEVELOPING EFFLUENT LIMITATIONS GUIDELINES, FEDERAL STANDARDS OF PERFORMANCE, AND PRETREATMENT STANDARDS FOR THE INDUSTRY. EFFLUENT LIMITATIONS GUIDELINES WERE DEVELOPED, DEFINING THE DEGREE OF EFFLUENT REDUCTION ATTAINABLE THROUGH THE APPLICATION OF THE BEST PRACTICABLE CONTROL TECHNOLOGY CURRENTLY AVAILABLE AND THE BEST AVAILABLE TECHNOLOGY ECONOMICALLY ACHIEVABLE. THE STANDARDS OF PERFORMANCE FOR NEW SOURCES WERE ALSO DEFINED. PROCESSES, WASTES, AND COSTS ARE ALSO DISCUSSED.|WHO; Diseases Caused by Phosphorus and Its Toxic Compounds; Early Detection of Occupational Diseases pg 53-62 (1986). Review of diseases and health related effects resulting from exposure to phosphorus or phosphorus cmpd.

Reacts violently with water to evolve heat. Flammable poisonous gases may accumulate in tanks and hopper cars. Phosphorus pentoxide reacts violently with the following: ammonia, hydrofluoric acid, oxygen difluoride, potassium, sodium, propargyl alcohol, calcium oxide, sodium hydroxide and chlorine trifluoride. A violent explosion occurs if a solution of perchloric acid in chloroform is poured over phosphorus pentoxide. Avoid formic acid, hydrogen fluoride, inorganic bases, metals, oxidants, water. Readily absorbs moisture from air to form meta-, pryo-, or orthophosphoric acid. (EPA, 1998)|Not combustible but enhances combustion of other substances. Many reactions may cause fire or explosion. Gives off irritating or toxic fumes (or gases) in a fire.|Corrosives, Reactive - 2nd degree

|Danger|H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, and P501|H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|P260, P264, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P363, P403+P233, P405, and P501|Aggregated GHS information provided by 1543 companies from 12 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Wear positive pressure breathing apparatus and special protective clothing. Keep combustibles away from spilled material. Does not support combustion. Do not get water inside container. For small fires, use dry chemical or carbon dioxide. For large fires, flood fire area with water from a distance. Do not get solid stream of water on spilled material. Spray cooling water on containers that are exposed to flames until well after fire is out. (EPA, 1998)|Use powder, carbon dioxide, dry sand. NO hydrous agents.

Excerpt from ERG Guide 137 [Substances - Water-Reactive - Corrosive]: 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 137 [Substances - Water-Reactive - Corrosive]: Fully encapsulating, vapor-protective clothing should be worn for spills and leaks with no fire. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Use water spray to reduce vapors; do not put water directly on leak, spill area or inside container. Keep combustibles (wood, paper, oil, etc.) away from spilled material. 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. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2016)

For emergency situations, wear a positive pressure, pressure-demand, full facepiece self-contained breathing apparatus (SCBA) or pressure- demand supplied air respirator with escape SCBA and a fully-encapsulating, chemical resistant suit. (EPA, 1998)|50 mg/cu m: High-efficiency particulate respirator wtih a full facepiece, supplied air respirator with a full facepiece, helmet, or hood, self-contained breathing apparatus with a full facepiece; 2,000 mg/cu m: Type C supplied air respirator with a full facepiece operated in pressure-demand or other positive pressure mode or with a full facepiece, helmet, or hood operated in continuous-flow mode. .

NONFLAMMABLE. DOES NOT SUPPORT COMBUSTION.|With the appropriate conditions it undergoes hazardous reactions with formic acid ... inorganic bases; iodides ... methyl hydroperoxide ... 3-propynol.|REACTS VIOLENTLY WITH WATER TO EVOLVE HEAT, DANGEROUS FIRE RISK

PHOSPHORUS PENTOXIDE IS REMOVED 95% IN A PARTICLE SCRUBBER. /SRP: TWO SECOND DWELL, 2050 °F TEMPERATURE AND 3% OXYGEN LEVEL/|In the flocculation-precipitation treatment, ... wastewater is adjusted to a pH value between weak acid and weak base. Approx 0.1-10 g/l wastewater of fine amorphous or crystalline particles of aluminosilicate or alkaline earth aluminum silicate is added to the water with the flocculant commonly used. Thus, aluminosilicate 0.5 g and Al2(SO4)3 640 mg Al are added to 1 l wastewater containing COD 2050 and P2O5 486 mg; the COD and P2O5 removal rates are 82 and 95% respectively, with the good filterability for the treated wastewater.

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.

/GUIDE 137: SUBSTANCES - WATER-REACTIVE - CORROSIVE/ Fire or Explosion: EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may burn, but none ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Flammable/toxic gases may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance may be transported in a molten form.|/GUIDE 137: SUBSTANCES - WATER-REACTIVE - CORROSIVE/ Health: CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.|/GUIDE 137: SUBSTANCES - WATER-REACTIVE - CORROSIVE/ Public Safety: CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number listed on the inside back cover. 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 137: SUBSTANCES - WATER-REACTIVE - CORROSIVE/ 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 PHOSPHORUS PENTOXIDE (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.|The International Maritime Dangerous Goods Code lays down basic principles for transporting hazardous chemicals. Detailed recommendations for individual substances and a number of recommendations for good practice are included in the classes dealing with such substances. A general index of technical names has also been compiled. This index should always be consulted when attempting to locate the appropriate procedures to be used when shipping any substance or article.

POWDER & FUMES IN AIR ARE IRRITATING TO EYES & RESPIRATORY TRACT.|It is corrosive to...skin...

Personal protection: chemical protection suit including self-contained breathing apparatus. Sweep spilled substance into covered containers. Cautiously neutralize remainder with soda ash or calcium carbonate. Wash away remainder with plenty of water.

Separated from combustible substances, reducing agents, strong oxidants, strong bases, 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 very corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of dust may cause lung oedema. The effects may be delayed. Medical observation is indicated.

NO contact with water or combustible substances.

PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!

Use local exhaust or breathing protection.

Protective gloves. Protective clothing.

Wear face shield or eye protection in combination with breathing protection.

LC50 Rat ihl 1217 mg/cu m/ 1 hr|LC50 Mouse ihl 271 mg/cu m/1 hr|LC50 Rabbit ihl 1689 mg/cu m/1 hr|LC50 Guinea pig ihl 61 mg/cu m/1 hr

PRESENT IN CONCENTRATIONS OF 0.04-0.33 (by wt) IN ILMENITE AND 0.02% (by wt) IN RUTILE, TITANIUM MINERAL CONCENTRATIONS|TYPICAL ANALYSIS OF ZIRCON SANDS REVEALS A CONCENTRATION RANGE OF PHOSPHORUS PENTOXIDE FROM 0.05%-0.39%.

ENVIRONMENTAL EVALUATIONS WERE CONDUCTED ON DEC 19-21, 1978 IN BUTTE, MONTANA TO DETERMINE POTENTIAL TOXIC EXPOSURE ASSOC WITH PRODN OF PHOSPHORUS AMONG 75-80 WORKERS. BREATHING ZONE & GENERAL ROOM AIR PHOSPHORUS PENTOXIDE CONCENTRATION WERE 1.7-9.2 MG/CU M. A POTENTIAL HEALTH HAZARD FROM EXCESSIVE AIRBORNE CONCENTRATION OF PHOSPHORUS PENTOXIDE EXISTED. RECOMMENDATIONS WERE MADE.

Technical grade (>98.0% pure): phosphorus trioxide, <0.3 wt %; arsenic, <50 ppm; iron, <2 ppm.|Reagent grade (>98.0% pure): phosphorus trioxide, <0.02 wt %; heavy metals, <0.01 wt % Pb; insoluble matter, <0.02 wt %; ammonium, <0.01 wt %.

Powder and fumes in the air are irritating to eyes and the respiratory tract. Particles in contact with eye react vigorously and even a small amount may cause permanent burns. Contact with the skin will cause severe burns. Ingestion will damage the gastrointestinal tract. Corrosive to skin, mucous membranes and eyes. (EPA, 1998)

Signs and Symptoms of Acute Phosphorus Pentoxide Exposure: Signs and symptoms of acute exposure to phosphorus pentoxide may include severe burns, pain, shock, intense thirst, nausea, vomiting, diarrhea, severe abdominal pain, and "smoking stools." The breath and feces may have a garlicky odor. A symptom-free period of several days may follow. Exposure to phosphorus pentoxide may also result in bloody vomitus and diarrhea, jaundice, liver enlargement with tenderness, renal damage, hematuria (bloody urine), and either oliguria (scanty urination) or anuria (suppression of urine formation). Headache, convulsions, delirium, coma, cardiac arrhythmias, and cardiovascular collapse may occur. If phosphorus pentoxide contacts the eyes, severe irritation and burns, blepharospasm (spasmodic winking), lacrimation (tearing), and photophobia (heightened sensitivity to light) may occur. Eye contact may lead to a total destruction of the eyes. Victims may experience spontaneous hemorrhaging of phosphorus pentoxide-contaminated skin and mucous membranes. Emergency Life-Support Procedures: Acute exposure to phosphorus pentoxide may require decontamination and life support for the victims. Emergency personnel should wear protective clothing appropriate to the type and degree of contamination. Air-purifying or supplied-air respiratory equipment should also be worn, as necessary. Rescue vehicles should carry supplies such as plastic sheeting and disposable plastic bags to assist in preventing spread of contamination. Inhalation Exposure: 1. Move victims to fresh air. Emergency personnel should avoid self-exposure to phosphorus pentoxide. 2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 3. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. 4. RUSH to a health care facility. Dermal/Eye Exposure: 1. Remove victims from exposure. Emergency personnel should avoid self- exposure to phosphorus pentoxide. 2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 3. Remove contaminated clothing as soon as possible. 4. Brush nonadherent phosphorus pentoxide from skin areas, then flush skin with water. Immerse exposed skin areas in water or cover with a wet dressing. 5. If eye exposure has occurred, eyes must be flushed with lukewarm water for AT LEAST 15 MINUTES. Keep exposed eyes covered with wet compresses. 6. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. 7. RUSH to a health care facility. Ingestion Exposure: 1. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer oxygen or other respiratory support. 2. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures. 3. Activated charcoal may be administered if victims are conscious and alert. Use 15 to 30 g (1/2 to 1 oz) for children, 50 to 100 g (1-3/4 to 3-1/2 oz) for adults, with 125 to 250 mL (1/2 to 1 cup) of water. 4. Promote excretion by administering a saline cathartic or sorbitol to conscious and alert victims. Children require 15 to 30 g (1/2 to 1 oz) of cathartic; 50 to 100 g (1-3/4 to 3-1/2 oz) is recommended for adults. 5. Ambulate (walk) and give water to the victims. 6. RUSH to a health care facility. (EPA, 1998)

Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . Wear protective gloves when administering first aid.

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

Basic treatment: Establish a patent airway. 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 pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush the eyes immediately with water. Irrigate each eye continuously with normal saline 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. Administer activated charcoal ... . If product was ingested, protect yourself from contact with vomitus as it may cause burns. /Phosphorus and Related compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or in respiratory arrest. Positive-pressure ventilation techniques with a bag-valve-mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV of D5W TKO /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Consider drug therapy for pulmonary edema ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Monitor for signs of hypoglycemia (decreased LOC, tachycardia, pallor, dilated pupils, diaphoresis, and/or dextrose stick or glucometer readings below 50 mg/dL) and administer 50% dextrose if necessary. Draw blood sample before administration ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Phosphorus and Related compounds/

PHOSPHORUS PENTOXIDE IS CORROSIVE & IRRITATING TO MUCOUS SURFACES, EYES AND SKIN.|POWDER & FUMES IN AIR ARE IRRITATING TO EYES & RESPIRATORY TRACT. PARTICLES OF SOLID PHOSPHORUS PENTOXIDE IN CONTACT WITH EYE REACT VIGOROUSLY, & EVEN SMALL AMT MAY CAUSE BURNS OF LIDS, CONJUNCTIVAE, & CORNEAS, PRODUCING BLUE-WHITE OPACITIES, WHICH MAY BE PERMANENT.|...One report of ingestion... This patient, who received four laparotomies because of recurrent abdominal hemorrhage, died on the nineteenth day with necrosis of the stomach, duodenum, jejunum and pancreas.|FUMES OF PHOSPHORUS PENTOXIDE @ CONCN ... FROM 0.8 TO 5.4 MG/CU M ... NOTICEABLE BUT NOT UNCOMFORTABLE, & CONCN BETWEEN 3.6 & 11.3 MG/CU M CAUSED COUGHING AMONG UNACCLIMATIZED, BUT COULD BE TOLERATED. CONCENTRATIONS OF 100 MG/CU M WERE UNBEARABLE, EXCEPT TO INURED WORKERS.

P2O5

The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

Sore throat. Cough. Burning sensation. Shortness of breath. Symptoms may be delayed.

Pain. Blisters. Skin burns.

Pain. Redness. Severe deep burns.

FLAME RETARDANTS AND PLASTICIZERS 65%; CATALYST 10%; PHARMACEUTICALS 10%; SURFACTANT/DETERGENTS 5%; MISC (OIL ADDITIVES, PIGMENTS) 10% (1984)|Phosphorus pentoxide used to make asphalt-blowing agents and in water treatment, amounted to 1000 tons in 1992.

Grades: Technical; Nitrogen-complex coated (for slow solution).|Technical grade, reagent grade - both typically >99% P4O10.

Adhesive manufacturing|Phosphorus oxide (P2O5): ACTIVE|Its molecular formula is P4O10, although it is often referred to by its empirical formula P2O5.

Fire Hazards -> Corrosives, Reactive - 2nd degree