Agent Name

Sodium hydrosulfite

Alternative Name

Sodium dithionite

CAS Number

7775-14-6

Formula

H2-O4-S2.2Na

Major Category

Metals

Synonyms

Blankit; Blankit IN; Burmol; Disodium dithionite; Disodium hydrosulfite; Dithionous acid, disodium salt; Hydros; Hydrosulfite R Conc; Sodium dithionite; Sodium hydrosulphite; Sodium hyposulfite; Sodium sulfoxylate; V-Brite B; Vatrolite; UN1384; [ChemIDplus]

Category

Hydrosulfites

Description

White to grayish-white granular powder with a sulfur dioxide odor; [CHEMINFO MSDS]

Sources/Uses

Used to dye fibers and textiles, to strip dyes from fabrics, and to bleach sugar, soap, oils and wood pulp; Used as a chemical reagent and an oxygen scavenger in the production of synthetic rubber; [Hawley]

Comments

A skin and eye irritant; Reacts with acids and hot water to form oxides of sulfur; Inhalation of high concentrations may cause acute pneumonitis; [CHEMINFO MSDS] Reacts with water to form hydrogen sulfide and sulfur dioxide; [ERG 2012]

Exposure Assessment
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]

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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