AKA “4-diamine sulfate, 4-phenylenediamine sulfate, Fourrine SO, 4-Benzenediamine, sulfate, Fourrine 81, Renal SO, 4-diammonium sulphate”
Synthetic
Ingredient Facts
2-chloro-p-phenylenediamine sulfate
AKA: 4-diamine sulfate, 4-phenylenediamine sulfate, Fourrine SO, 4-Benzenediamine, Fourrine 81, Renal SO, 4-diammonium sulphate
Synthetic · Hair Dyeing · EWG: 4
Synthetic
Synthetic
Clean
A color-depositing ingredient that helps hair dyes bond to strands, creating rich, long-lasting color in hair coloring products.
Solubility less than 1 mg/mL at 70 °F (NTP, 1992)
Formula
C6H9ClN2O4S
Mol. Weight
240.67
CAS #
6219-71-2, 61702-44-1
Form
Powder
State
2-chloro-p-phenylenediamine sulfate appears as light gray or lavender powder. (NTP, 1992)
See origin →
Functions
Hair Dyeing
Colors Hair
Traditional Use
A sulfate salt of a synthetic hair dye precursor developed for improved solubility in aqueous formulations. The salt form was created to enhance stability and color development in permanent hair dyes.