Agent Name

Polyphosphoric acid

CAS Number

8017-16-1

Major Category

Toxic Gases & Vapors

Synonyms

Condensed phosphoric acid; Phospholeum; Polyphosphoric acids; Superphosphoric acid; [ChemIDplus]

Category

Acids, Inorganic

Description

Water-white hygroscopic liquid; [Hawley] Colorless hygroscopic liquid; [HSDB]

Sources/Uses

A series of strong phosphoric acids with the equation H(2n) P(n) O(3n+1); For pyrophosphoric acid (H4P2O7), n=2; Commercial product is a mixture of these acids and sold based on percentage H3PO4; Used as dehydrating, catalytic, and sequestering agents, for metal treatment, and as laboratory reagents; [Hawley] Used as protein precipitants (for coagulation, separation, and purification), catalysts (petroleum and chemical industries), dehydrating agents (dye and pigment production), and stabilizers (skimmed sweetened condensed milk and dry milk); Also used to make phosphate esters and fertilizers; [HSDB]

Comments

Emergency treatment: "Phosphoric acid"; Concentrations of phosphoric acid >75% cause severe burns and can produce phosphine gas after reacting with metal; Ingestion of as little as 8 mL of phosphoric acid can be fatal; [HSDB] A corrosive substance that can cause injury to the skin and eyes; Mists can cause severe irritation to nose, throat, and respiratory tract; [CHEMINFO] Corrosive to skin and eyes; After inhalation, may cause acute pneumonitis; May cause injury to liver and bone; [Alfa Aesar MSDS]

Adverse Effects
Toxic Pneumonitis

Yes

Hepatotoxin

Hepatotoxin, Secondary

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: