ICSC 0545 - PHOSPHORUS PENTOXIDE

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PHOSPHORUS PENTOXIDE	ICSC: 0545 (September 1997)
Diphosphorus pentoxide Phosphoric anhydride Phosphorus pentaoxide

CAS #: 1314-56-3

UN #: 1807

EC Number: 215-236-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	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.

PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
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	CLASSIFICATION & LABELLING
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.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 8; UN Pack Group: II
STORAGE
Separated from combustible substances, reducing agents, strong oxidants, strong bases, water and food and feedstuffs. Dry.
PACKAGING
Airtight. Do not transport with food and feedstuffs.

PHOSPHORUS PENTOXIDE

ICSC: 0545

PHYSICAL & CHEMICAL INFORMATION
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.	Formula: P₂O₅ Molecular mass: 141.9 Sublimation point: 360°C Melting point: 340°C Relative density (water = 1): 2.4 Solubility in water: reaction

PHYSICAL & CHEMICAL INFORMATION

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.

Formula: P₂O₅
Molecular mass: 141.9
Sublimation point: 360°C
Melting point: 340°C
Relative density (water = 1): 2.4
Solubility in water: reaction

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 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.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

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.

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

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
EU-OEL: 1 mg/m³ as TWA. MAK: (inhalable fraction): 2 mg/m³; peak limitation category: I(2); pregnancy risk group: C

ENVIRONMENT

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 are therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered. NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.

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 are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.
NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.

ADDITIONAL INFORMATION

EC Classification
Symbol: C; R: 35; S: (1/2)-22-26-45

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