International Chemical Safety Cards

PHOSPHORIC ACID ICSC: 1008
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
Orthophosphoric acid
H3O4P / H3PO4
Molecular mass: 98.0
8 Corrosive placard ICSC #    1008
CAS #     7664-38-2
RTECS # TB6300000
UN #        1805
EC #         015-011-00-6
March 10, 2000 Validated
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 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
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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 as TWA, 3 mg/m³ as STEL; (ACGIH 2004).
MAK: (Inhalable fraction) 2 mg/m³;
Peak limitation category: I(2); Pregnancy risk group: C;
(DFG 2005).
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 See: 7664382


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. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-80S1805

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.