PHOSPHORIC ACID (ICSC)

PHOSPHORIC ACID	ICSC: 1008

Date of Peer Review: October 2000

Orthophosphoric acid

CAS #

7664-38-2

H₃O₄P / H₃PO₄

RTECS #

TB6300000

Molecular mass: 98.0

UN #

1805

EC Index #

015-011-00-6

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. See Notes.		In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION

EXPOSURE		PREVENT GENERATION OF MISTS!
Inhalation	Burning sensation. Cough. Shortness of breath. Sore throat.	Ventilation.	Fresh air, rest. Refer for medical attention.
Skin	Redness. Pain. Skin burns. Blisters.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes	Pain. Redness. Severe deep burns.	Safety goggles 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 pain. Burning sensation. Shock or collapse.	Do not eat, drink, or smoke during work.	Rinse mouth. Give plenty of water to drink. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL

PACKAGING & LABELLING

Sweep spilled substance into covered containers. Carefully collect remainder, then remove to safe place. Chemical protection suit including self-contained breathing apparatus.

Do not transport with food and feedstuffs.
EU Classification
Symbol: C
R: 34
S: (1/2-)-26-45
Note: [B]
UN Classification
UN Hazard Class: 8
UN Pack Group: III

EMERGENCY RESPONSE

STORAGE

Transport Emergency Card: TEC (R)-80S1805
NFPA Code: H 2; F 0; R 0;

Separated from food and feedstuffs. See Chemical Dangers. Well closed. 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 Š IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK

PHOSPHORIC ACID

ICSC: 1008

IMPORTANT DATA

PHYSICAL STATE; APPEARANCE:
HYGROSCOPIC, COLOURLESS CRYSTALS.

CHEMICAL DANGERS:
The substance violently polymerizes under the influence of azo compounds and epoxides. On combustion, forms toxic fumes (phosphorous oxides). The substance decomposes on contact with alcohols, aldehydes, cyanides, ketones, phenols, esters, sulfides, halogenated organics producing toxic fumes. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). The substance is a medium strong acid. Reacts violently with bases.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 mg/mł as TWA, 3 mg/mł as STEL; (ACGIH 2004).
MAK: (Inhalable fraction) 2 mg/mł; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2005).
1 mg/mł (8h), 2 mg/mł (short term) EC OELs

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

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion.

PHYSICAL PROPERTIES

Decomposes below boiling point at 213°C
Melting point: 42°C
Density: 1.9 g/cmł
Solubility in water: very good
Vapour pressure, Pa at 20°C: 4

ENVIRONMENTAL DATA

NOTES

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

Š IPCS, CEC 2005

    See Also:
       Toxicological Abbreviations
       Phosphoric acid (FAO Nutrition Meetings Report Series 38a)
       PHOSPHORIC ACID (JECFA Evaluation)