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CI 26100.

Avoid CAS 85-86-9 / COLORANT

CI 26100 is a synthetic azo dye primarily utilized as a red cosmetic colorant. It is known by various names including D&C Red No. 17 and Solvent Red 23, used to impart color in oil-based formulations.

colorant

Science

As an azo dye, CI 26100 can undergo reductive cleavage on the skin or within the body, potentially forming carcinogenic aromatic amines like 4-aminoazobenzene. Studies also suggest it may cause weak endocrine disruption and liver enzyme interference.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Insoluble in water but readily soluble in oils, fats, and waxes. It exhibits good thermal stability, lightfastness, and resistance to acids and alkalis, though high heat can cause color fading.

Conflicts

  • strong oxidizing agents

Safety

CIR Status
Not reviewed
Sensitization risk Unknown

Regulatory bodies like the EU, Canada, and SCCS have raised significant concerns regarding CI 26100's safety due to its potential to release carcinogenic aromatic amines and cause endocrine disruption. It is restricted in the EU, prohibited in hair dyes, and should not be used near mucous membranes.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Avoid

Due to substantial safety concerns, including the potential formation of carcinogenic compounds and widespread regulatory restrictions, CI 26100 is not recommended for use in precision skincare.


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