Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
2,2'-[Cyclohexylidenebis[(2-methyl-4,1-phenylene)azo]]bis[4-cyclohexylphenol] (Solvent Yellow 29; CI 21230) when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
Concern score
The concern value reflects this ingredient's chemical identity — its hazard profile from the published classifications and regulatory status below — not the safety of a product it appears in. A score near 40 is the baseline for ingredients with no specific signal (water scores 40 by design), so a mid-range value is not a safety verdict.
Concern score 100/100 (critical) · high confidence.
Regional restrictions
Prevalence of 2,2'-[(1~3~,3~3~-Dimethyl-2~3~,2~4~,2~5~,2~6~-tetrahydro-2~2~H-[1~1~,2~1~:2~1~,3~1~-terphenyl]-1~4~,3~4~-diyl)bis(diazene-2,1-diyl)]bis(4-cyclohexylphenol) in our catalog (epa_cpdat).
Brands
1
Typical roles
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
Primary documents currently linked to this ingredient record.
Structured claim signals pulled from linked ingredient research.
Published jurisdiction-level classifications and regulatory designations for this ingredient.
EU
EC
Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.
EU
EC
Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Not to be used in products applied on mucous membranes
US
EPA
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
The published evidence profile currently shaping this ingredient record.
EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.