Agent Name

Zinc hydrosulfite

CAS Number

7779-86-4

Formula

H2-O4-S2.Zn

Major Category

Metals

Synonyms

DITHIONOUS ACID, ZINC SALT (1:1); ZINCATE(4-), TETRAKIS(MONOTHIOSULFATO(2-))DI-; ZINC DITHIONITE; [HSDB]

Category

Hydrosulfites

Description

White powder; [CAMEO]

Sources/Uses

Used to bleach wood pulp, textiles, and other natural materials; [CAMEO]

Comments

Reacts with water to form hydrogen sulfide and sulfur dioxide; [ERG 2016] An irritant to the skin, eyes, and respiratory tract; Reacts with water to form sulfur dioxide; [CAMEO] See "Zinc."

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]

MAK

0.1 mg/m3(respirable fraction), 2 mg/m3 (inhalable fraction) for Zn inorg. cmpnds

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

Human Health Effects from Hazardous Substances Data Bank:

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

Industrial Processes with risk of exposure: