Ingredient profile
Direct Black 51
Raters disagreehair dyeingCAS 3442-21-5
At least one of our safety lists speaks to this ingredient. Also written as DIRECT BLACK 51.
Raters don't agree. Here's where each one stands
Safe
Greenlens Precautionary Screen
Independent
Caution
Greenlens Ingredient Scan
Independent
Greenlens Tolerance Screen
Independent
Concern
—
Where each list lands
Funding shown- Caution
Greenlens Ingredient Scan
Independent
Listed in Annex II (ref 1266) only when used in a hair dye product. In other product types this use does not apply, so the listing is recorded as a restriction rather than a ban. (EU Cosmetics Regulation Annex II (prohibited))
- Safe
Greenlens Precautionary Screen
Independent
No listed hazard trait recognized for this ingredient.
- Caution
Also screened — not on these lists
- Health Canada Ingredient Hotlist
- California Proposition 65
- US NTP Report on Carcinogens
- IARC Monographs
- ANSES Endocrine Disruptors
- EU Microplastics Restriction
- EU Harmonised Classification (CLP Annex VI)
Where regulators stand
Shown side by side, never combinedEach jurisdiction is reported on its own terms, from its own official lists. Where they disagree, that disagreement is the finding. Absence from a list is never a safety claim.
European Union
RestrictedAllowed only under stated conditions or limits.
- European Commission · EU Cosmetics Regulation Annex II (prohibited)Listed in Annex II (ref 1266) only when used in a hair dye product. In other product types this use does not apply, so the listing is recorded as a restriction rather than a ban.
Canada
No listing foundNot on the lists we hold for this jurisdiction. That is an absence of a listing, not a safety finding.
Checked: Health Canada Cosmetic Ingredient Hotlist.
California
No listing foundNot on the lists we hold for this jurisdiction. That is an absence of a listing, not a safety finding.
Notes
- EU-restricted (with limits)
