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PHOSPHORUS PENTOXIDE ICSC: 0545
Date of Peer Review: April 1997

Diphosphorus pentoxide
Phosphoric anhydride
Phosphorus pentaoxide
CAS # 1314-56-3 P2O5
RTECS # TH3945000 Molecular mass: 141.9
UN # 1807
EC Index # 015-010-00-0
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE 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.
NO contact with water and combustibles.
Powder. Carbon dioxide. Dry sand. NO hydrous agents.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Sore throat. Cough. Burning sensation. Shortness of breath. Symptoms may be delayed (see Notes).
Local exhaust or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Pain. Blisters. Skin burns.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention. Wear protective gloves when administering first aid.
Eyes Pain. Redness. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Burning sensation. Diarrhoea. Sore throat. Vomiting.
Do not eat, drink, or smoke during work.
Do NOT induce vomiting. Rest. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into containers. Cautiously neutralize remainder with soda ash or calcium carbonate. Wash away remainder with plenty of water. Personal protection: chemical protection suit including self-contained breathing apparatus.
Airtight. Do not transport with food and feedstuffs.
EU Classification
Symbol: C
R: 35
S: (1/2-)-22-26-45
UN Classification
UN Hazard Class: 8
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-80GC2-II+III
NFPA Code: H2; F0; R2;
Separated from combustible and reducing substances, strong oxidants, strong bases, food and feedstuffs, water. Dry.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
PHOSPHORUS PENTOXIDE ICSC: 0545
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
HYGROSCOPIC, WHITE CRYSTALS OR POWDER.

CHEMICAL DANGERS:
The solution in water is a strong acid, it reacts violently with bases and is corrosive. Reacts violently with perchloric acid causing fire and explosion hazard. Reacts violently with water to produce phosphoric acid. Attacks many metals in presence of water.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK: (Inhalable fraction) 2 mg/m; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is very corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of dust of this substance may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated.

PHYSICAL PROPERTIES
Sublimation point: 360C
Melting point: 340C
Relative density (water = 1): 2.4
Solubility in water: reaction
ENVIRONMENTAL DATA

NOTES
Reacts violently with fire extinguishing agents such as water. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005