Sodium hydrosulfite
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 2016]
Biomedical References
Exposure Assessment
TIH
Yes
Dangerous When Wet
Yes
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
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: