Ammonium Sulfite
AKA “Ammonium sulphite, Diammonium sulfite, Diammonium sulfonate, Sulfurous acid, diammonium salt, ammonium salt, RefChem:112210”
Synthetic
Ingredient Facts
Ammonium sulfite
AKA: Ammonium sulphite, Diammonium sulfite, Diammonium sulfonate, Sulfurous acid, Diammonium salt, Ammonium salt, RefChem:112210
Synthetic · Preservative · EWG: 4
Synthetic
Preservative
Synthetic
Clean
A reducing agent that helps set hair waves or straightens texture while preserving product freshness.
Solubility Soluble in water, almost insoluble in alcohol, acetone.
Formula
H8N2O3S
Mol. Weight
116.14
CAS #
10196-04-0
Form
Powder
State
Ammonium sulfite is a colorless crystalline solid. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in the manufa
See origin →
Functions
Hair Waving Or Straightening
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Reducing
Preserves Formula
Reducing Agent
Antioxidant Protection
Fights Bacteria
Reduces Inflammation
Changes hair texture
Prevents microbial growth
Chemical reduction
Traditional Use
A synthetic salt developed for industrial purposes. Used in cosmetics as a preservative and reducing agent, particularly in hair treatment formulations, with no traditional use history.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Concentration Guide
0.2%
0%0%
Reg. Limit
EU regulatory limit: 0.2%. SO2) Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 9.
Regulatory Agencies
Final Report on the Safety Assessment of Sodium Sulfite, Potassium Sulfite, Ammonium Sulfite, Sodium Bisulfite, Ammonium Bisulfite, Sodium Metabisulfite, and Potassium Metabisulfite
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Ammonium Sulfite
European Commission
EU Cosmetic Ingredient Database (CosIng)
Furfuryltrimethyl ammonium salts
Health Canada
Health Canada Cosmetic Ingredient Hotlist
Identification of didecyldimethylammonium salts and salicylic acid as antimicrobial compounds in commercial fermented radish kimchi.
Li J, Chaytor JL, Findlay B, McMullen LM, Smith DC et al.
Journal of agricultural and food chemistry, 2015
Identification of didecyldimethylammonium salts and salicylic acid as antimicrobial compounds in commercial fermented radish kimchi.
Li J, Chaytor JL, Findlay B, McMullen LM, Smith DC et al.
Journal of agricultural and food chemistry, 2015
Identification of didecyldimethylammonium salts and salicylic acid as antimicrobial compounds in commercial fermented radish kimchi.
Li J, Chaytor JL, Findlay B, McMullen LM, Smith DC et al.
Journal of agricultural and food chemistry, 2015
Identification of didecyldimethylammonium salts and salicylic acid as antimicrobial compounds in commercial fermented radish kimchi.
Li J, Chaytor JL, Findlay B, McMullen LM, Smith DC et al.
Journal of agricultural and food chemistry, 2015
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR