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N-Phenyl-p-Phenylenediamine Sulfate
AKA “4698-29-7, p-Aminodiphenylamine sulfate, 1, 4-Benzenediamine, N1-phenyl-, sulfate (2:1), RODOL GRAY BS, COLOREX 4ADS, M53XF75F63, N-Phenyl-1, 4-benzenediamine sulfate, N-phenyl-, DTXSID20884102”
Ingredient
Ingredient Facts
N-phenyl-p-phenylenediamine sulfate
AKA: 4698-29-7, P-Aminodiphenylamine sulfate, 1, 4-Benzenediamine, N1-phenyl-, Sulfate (2:1), RODOL GRAY BS, COLOREX 4ADS, M53XF75F63, N-Phenyl-1, 4-benzenediamine sulfate, DTXSID20884102
Ingredient · Hair Dyeing · EWG: 6
Synthetic
Not Clean
bis(N-Phenylbenzene-p-diamine) sulphate (CI 76085)
Formula
C24H26N4O4S
Mol. Weight
466.60
CAS #
4698-29-7
Form
Powder
See origin →
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.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
Allergen Warning
⚠️ PPD (Hair Dye)
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
Final Report on the Safety Assessment of N-Phenyl-p-Phenylenediamine, N-Phenyl-p-Phenylenediamine Hydrochloride, and N-Phenyl-p-Phenylenediamine Sulfate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
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N-Phenyl-p-Phenylenediamine
European Commission
EU Cosmetic Ingredient Database (CosIng)
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N-Phenyl-p-Phenylenediamine HCl
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
N-Phenyl-p-Phenylenediamine Sulfate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
N-Phenyl-p-Phenylenediamine
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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N-Phenyl-p-Phenylenediamine Sulfate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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Studies on the skin uptake and efflux kinetics of N-phenyl-p-phenylenediamine: an aromatic amine intermediate.
Khanna SK, Tewari P, Joshi A, Singh GB
International journal of cosmetic science, 1987
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR