Griffin Dyeworks & Fiber Arts

Understanding Mordants and Modifiers

Sodium Hydrosulfite


Description: White crystalline water-soluble powder often confused with two other chemicals called the same name
Other Names: Sodium dithionite, sodium bithionite, sodium sulfoxylate, dithionous acid
Dye Use: Alkali mordant, reducing agent, dye discharge agent and indigo vat oxidizer largely replaced by Thiox.
Best On: Cellulose fiber
Dye Recipe: Use as directed in indigo vat recipes
Safety: Chemical hazard!
Disposal: Dilute and pour down toilet
Alternative: Rit® Color Remover, which contains a small amount of sodium dithionite
Source: Chemical supply house

CODES: c = cup; gal = gallon; lb = pound (weight); tbsp = Tablespoon; tsp = teaspoon / [AF] Anglo-French; [Ar] Arabic; [AS] Anglo-Saxon; [Dan] Danish; [Du] Dutch; [Fr] French; [Ger] German; [Gk] Greek; [It] Italian; [L] Classical Latin; [LL] Late Latin; [ME] Middle English; [ML] Modern Latin; [OE] Old English; [OF] Old French; [ON] Old Norse; [OS] Old Saxon; [Port] Portuguese; [Sp] Spanish; [Sw] Swedish / CE = Common Era; BCE = Before Common Era

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