A color-depositing ingredient that helps create long-lasting hair dye shades. Works as a key component in permanent hair coloring formulas.
Solubility greater than or equal to 100 mg/mL at 74.3 °F (NTP, 1992)
Formula
C6H10Cl2N2O
Mol. Weight
197.06
CAS #
137-09-7
Form
Powder
State
Grayish-white crystals. (NTP, 1992)
See origin →
Functions
Hair Dyeing
Colors Hair
Traditional Use
A hydrochloride salt of 2,4-diaminophenol used in permanent hair dye formulations since the mid-20th century. It serves as an oxidative dye coupler for creating brown and black hair colors.