Ammonium Bisulfite
molecular structure · PubChem
AKA: 10192-30-0, Ammonium hydrogen sulfite, Ammonium acid sulfite, Ammonium monosulfite, Monoammonium sulfite, Ammonium hydrosulfite, Sulfurous acid, Monoammonium salt, Ammonium sulfite, Hydrogen
Synthetic
Preservative
Not Clean
Ammonium bisulfite is colorless crystals which are soluble in water. It is noncombustible. It is corrosive to aluminum. It is a strong irritant to skin and mucous membranes. It is toxic by skin absorption.
Solubility In water: 267 g/100 ml @ 10 °C, 620 G/100 ml @ 60 °C
Formula
H5NO3S
Mol. Weight
99.11
CAS #
10192-30-0
Form
Powder
State
Ammonium bisulfite is colorless crystals which are soluble in water. It is noncombustible. It is corrosive to aluminum. It is a strong irritant to skin and mucous membranes. It is toxic by skin absorp
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
Developed as a preservative and antioxidant in the 19th century for use in food and cosmetics. Used to prevent oxidation and microbial growth in cosmetic formulations.
EWG
4
CIR
Safe as used
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
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR