4-Methoxy-m-Phenylenediamine Sulfate

AKA “4-DIAMINOANISOLE SULFATE, Pelagol Grey, Durafur Brown MN, Furro SLA, Ursol SLA, Pelagol Grey SLA, Nako TSA, BASF Ursol SLA”

Synthetic

Ingredient Facts

4-methoxy-m-phenylenediamine sulfate

AKA: 4-DIAMINOANISOLE SULFATE, Pelagol Grey, Durafur Brown MN, Furro SLA, Ursol SLA, Pelagol Grey SLA, Nako TSA, BASF Ursol SLA

Synthetic · Colorant · EWG: 4

Synthetic

Colorant

Synthetic

Clean

A synthetic colorant used in permanent hair dyes to create lasting brown and brunette shades.

Solubility 10 to 50 mg/mL at 65.3 °F (NTP, 1992)

Formula

C7H12N2O5S

Mol. Weight

236.25

CAS #

39156-41-7

Form

Powder

State

2,4-diaminoanisole sulfate appears as off-white to violet or dark brown powder. Emits toxic fumes of nitrogen oxides and sulfur oxides when heated to decomposition.

See origin →

Functions

Colorant

Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.

Traditional Use

A synthetic hair dye intermediate developed in the 20th century. The sulfate salt form was engineered for improved solubility and stability in permanent hair color products.