murphyDisperse Black 9
AKA: 12222-69-4, 2'-((p-((p-Aminophenyl)azo)phenyl)imino)diethanol, COLOREX DBL9, LOWADENE BLACK 9, Ethanol
Synthetic
Not Clean
2,2'-[[4-[(4-aminophenyl)azo]phenyl]imino]bisethanol (CI 111301)
Formula
C16H20N4O2
Mol. Weight
300.36
CAS #
20721-50-0
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
Functions
Hair Dyeing
Improves Elasticity
Antimicrobial
Colors hair
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
Not a Sensitizer
2 studies / 2 not sensitizing (CIR 184)
Not Phototoxic
Animal test found no phototoxicity in the CIR safety assessment (CIR 184)
Mixed Eye Irritation Results
5 studies / 1 irritating / 1 mixed / 3 not irritating (CIR 184)
Mixed Skin Irritation Results
5 studies / 1 mixed / 4 not irritating / reactions minimal (CIR 184)
Concentration Guide
0%50%100%
Reg. limit 3%
EU regulatory limit: 3%. 0, (of the mixture in the ratio 1:1 of 2,2' -[4-(4-aminopheny-lazo)pheny-limino]diethanol and lignosulfate) Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 263.
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR