Agent Name

Potassium hydrosulfite

Alternative Name

Potassium dithionite

CAS Number

14293-73-3

Formula

H2-O4-S2.2K

Major Category

Metals

Synonyms

Potassium dithionite or potassium hydrosulfite; [ChemIDplus] Potassium hydrosulphite; [ERG] Dipotassium dithionite; [CAMEO] Dithionous acid, dipotassium salt; [HSDB] UN1929

Category

Hydrosulfites

Description

Light yellow solid; [CAMEO]

Sources/Uses

Used to make dyes and other chemicals; [CAMEO]

Comments

Highly flammable; A strong reducing agent that reacts with water and air; [CAMEO] See "Sodium hydrosulfite."

Exposure Assessment
TIH

Yes

Dangerous When Wet

Yes - A material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material, per hour; [ERG 2004]

Explanatory Notes

Not TIH in land-based spills, but TiH substance released when spilled in water; [ERG 2016]

Adverse Effects
Toxic Pneumonitis

Yes

Other Poison

Chemical Asphyxiant

Links to Other NLM Databases
Health Studies

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Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

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