Safety data for phosphoric acid

General

Synonyms: orthophosphoric acid Molecular formula: H3PO4 CAS No: 7664-38-2 EC No: 231-633-2 EC Index No: 015-011-00-6

Physical data

Appearance: colourless odourless liquid Melting point: 21 C (pure) Boiling point: 158 C (pure) Typical concentration: see data for typical acids and bases Vapour density: 3.4 Vapour pressure: 2.2 mm Hg at 20 C Specific gravity: 1.685 Flash point: Explosion limits: Autoignition

temperature:

Stability
Stable. Incompatible with powdered metals, strong bases, iron-containing compounds.

Toxicology

Corrosive - causes burns. Harmful if swallowed and in contact with skin. May be harmful through inhalation. Very destructive of mucous membranes, respiratory tract, eyes and skin. Typical TLV 1 mg/m3. Typical PEL 1 mg m-3.
Toxicity data (The meaning of any abbreviations which appear in this section is given here.) ORL-RAT LD50 1530 mg kg-1 UNR-MAN LDLO 200 mg kg-1 IHL-RAT LC50 > 850 mg/m3/1h SKN-RBT LD50 2740 mg kg-1
Risk phrases (The meaning of any risk phrases which appear in this section is given here.) R21 R22 R34.

Transport information

(The meaning of any UN hazard codes which appear in this section is given here.)

Personal protection

Safety glasses, adequate ventilation, rubber or plastic gloves.
Safety phrases (The meaning of any safety phrases which appear in this section is given here.) S26 S36 S37 S39 S45.