International Chemical Safety Cards

PHOSPHORIC ACID

ICSC: 1008

Orthophosphoric acid
H₃O₄P / H₃PO₄
Molecular mass: 98.0

ICSC #    1008
CAS #     7664-38-2
RTECS # TB6300000
UN #        1805
EC #         015-011-00-6
October 03, 2000 Peer reviewed

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: all extinguishing agents allowed.
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

STORAGE

PACKAGING & LABELLING

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

Separated from food and feedstuffs. See Chemical Dangers. Well closed. Dry.

Do not transport with food and feedstuffs.
Note: B
C symbol
R: 34
S: 1/2-26-45
UN Hazard Class: 8
UN Packing Group: III

SEE IMPORTANT INFORMATION ON BACK

ICSC: 1008

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

PHOSPHORIC ACID

ICSC: 1008

I

M

P

O

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T

A

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D

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T

A

PHYSICAL STATE; APPEARANCE:
HYGROSCOPIC , COLOURLESS CRYSTALS .

PHYSICAL DANGERS:

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/m³ (ACGIH 1999).
TLV (as STEL): 3 mg/m³ (ACGIH 1999).
1 mg/m³ (8h), 2 mg/m³ (short term) EC OELs
OSHA PEL: TWA 1 mg/m³
NIOSH REL: TWA 1 mg/m³ ST 3 mg/m³
NIOSH IDLH: 1000 mg/m³

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.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Decomposes below boiling point at 213°C
Melting point: 42°C
Density: 1.9
g/cm3

Solubility in water:
very good
Vapour pressure, Pa at 20°C: 4

ENVIRONMENTAL
DATA

N O T E S

NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.

Transport Emergency Card: TEC (R)-80G01

NFPA Code: H 2; F 0; R 0;

ADDITIONAL INFORMATION

ICSC: 1008	PHOSPHORIC ACID
(C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE:

Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.