Direct Black 51
Used in cosmetic products as hair dyeing. Disodium 5-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate (CI 27720)
EU Cosmetics Regulation (EC) No 1223/2009, Annex II/1266.
ban substances that deplete the ozone layer
The chemical behind this ingredient
Structure, properties, safety data and price information live on the chemical page.
![Disodium 5-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate chemical structure, C27H17N5Na2O7S, CAS 3442-21-5](/s/DSCVOQXQGTYXMV-UHFFFAOYSA-L.svg)
IUPAC name: disodium, 6-amino-3-[[4-[(3-carboxy-4-hydroxyphenyl)diazenyl]naphthalen-1-yl]diazenyl]-4-oxidonaphthalene-2-sulfonate
- 2D structure and identifiers
- Measured and computed properties
- GHS safety summary
- Suppliers, prices and trade data
Direct Black 51 suppliers
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Frequently asked questions
What is Direct Black 51 used for in cosmetics?
Direct Black 51 is used in cosmetic products as hair dyeing. Disodium 5-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate (CI 27720)
Is Direct Black 51 restricted in cosmetics in the EU?
Direct Black 51 is listed in the annexes of EU Cosmetics Regulation (EC) No 1223/2009: Annex II/1266 (prohibited in eu cosmetics). ban substances that deplete the ozone layer Always check the full annex entry for the conditions of use.
What is the CAS number of Direct Black 51?
Direct Black 51 is listed with CAS number 3442-21-5 and EC number 222-351-0.
Where can I buy Direct Black 51?
Post a buy request for Disodium 5-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate with the grade, quantity and destination you need, and matching suppliers will send you quotes.