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PHOSPHORUS PENTOXIDE
ICSC: 0545
Peer-Review Status: 04.09.1997 Validated
Diphosphorus pentoxide
Phosphoric anhydride
Phosphorus pentaoxide 
CAS #: 1314-56-3 RTECS #: TH3945000
UN #: 1807
EC #: 015-010-00-0
EINECS #: 215-236-1
    Formula: P2O5
Molecular mass: 141.9

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 or combustible substances.  Use 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.  Use 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.  Wear 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 refer for medical attention. 
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
Personal protection: chemical protection suit including self-contained breathing apparatus. Sweep spilled substance into covered containers. Cautiously neutralize remainder with with soda ash or calcium carbonate. Wash away remainder with plenty of water.  Airtight.
Do not transport with food and feedstuffs. 
EC Classification
Symbol: C; R: 35; S: (1/2)-22-26-45 
UN Classification
UN Hazard Class: 8; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-80GC2-II+III.
NFPA Code: H2; F0; R2. 
Separated from combustible substances, reducing agents, strong oxidants, strong bases, water and food and feedstuffs. Dry. 

IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC WHITE CRYSTALS OR POWDER. 

Physical dangers
 

Chemical dangers
The solution in water is a strong acid. It reacts violently with bases and is corrosive. Reacts violently with perchloric acid. This generates fire and explosion hazard. Reacts violently with water. This produces phosphoric acid. Attacks many metals in the presence of water. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):.
MAK (inhalable fraction): 2 mg/m³; 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 20°C 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, skin and respiratory tract. Corrosive on ingestion. Inhalation of dust may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


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

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
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations