N-Phenyl-p-Phenylenediamine Sulfate

N-Phenyl-p-Phenylenediamine Sulfate molecular structure
molecular structure · PubChem
AKA: 4698-29-7, P-Aminodiphenylamine sulfate, 1, 4-Benzenediamine, Sulfate (2:1), RODOL GRAY BS, COLOREX 4ADS, N-Phenyl-1, 4-benzenediamine sulfate
Allergen Warning
⚠️ PPD (Hair Dye)
Synthetic
Not Clean
bis(N-Phenylbenzene-p-diamine) sulphate (CI 76085)
Formula
C24H26N4O4S
Mol. Weight
466.60
CAS #
4698-29-7
Form
Powder
Functions
Hair Dyeing
Boosts Collagen
Fights Acne
Colors hair
Traditional Use
Sulfate salt of a synthetic hair dye precursor created for cosmetic use in the 20th century. Functions as an oxidative dye intermediate in permanent hair color products.
EWG
6
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR