Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers

IUPAC Name

tetrasodium;5-amino-3-[[4-[4-[(8-amino-1-hydroxy-3,6-disulfonatonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate

InChIKey

OLSOUGWNONTDCK-UHFFFAOYSA-J

SMILES

COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C(C=C4C=C3S(=O)(=O)[O-])S(=O)(=O)[O-])N)O)OC)N=NC5=C(C6=C(C=C(C=C6C=C5S(=O)(=O)[O-])S(=O)(=O)[O-])N)O.[Na+].[Na+].[Na+].[Na+]

Synonyms (76)

Airedale Blue D
Aizen Direct Sky Blue 5B
Aizen Direct Sky Blue 5BH
Amanil Sky Blue
Atlantic Sky Blue A
Atul Direct Sky Blue
Azine Sky Blue 5B
Belamine Sky Blue A
Benzanil Sky Blue
Benzo Sky Blue A-CF
Benzo Sky Blue S
CI Direct Blue 15
Cartalsol Blue 2GF
Cartasol Blue 2GF
Chicago blue 4B
Chloramine Sky Blue 4B
Chloramine Sky Blue A
Chrome Leather Pure Blue
Cresotine Pure Blue
DIRECT BLUE 15
Diacotton Sky Blue 5B
Diamine Blue 6B
Diamine Sky Blue
Diamine Sky Blue CI
Diaphtamine Pure Blue
Diazol Pure Blue 4B
Diphenyl Brilliant Blue
Diphenyl Sky Blue 6B
Direct Blue 10G
Direct Blue HH
Direct Pure Blue
Direct Pure Blue M
Direct Pure Blue N
Direct Sky Blue
Direct Sky Blue 5B
Direct Sky Blue A
Enianil Pure Blue AN
Fenamin Sky Blue
Hispamin Sky Blue 3B
Kayafect Blue Y
Kayaku Direct SKH Blue 5B
Kayaku Direct Sky Blue 5B
Mitsui Direct Sky Blue 5B
Modr Prima 15
Modr Prima 15 [Czech]
NCI C61290
Naphtamine Blue 10G
Niagara Blue 4B
Niagara Sky Blue
Nippon Direct Sky Blue
Nippon Sky Blue
Nitsui Direct Sky Blue 5B
Nitto Direct Sky Blue 5B
Oxamine Sky Blue 5B
Paper Blue S
Phenamine Sky Blue A
Pontacyl Sky Blue 4BX
Pontamine Sky Blue 5BX
Pontamine sky blue 5B
Shikiso Direct Sky Blue 5B
Sky Blue 4B
Sky Blue 5B
Tertrodirect Blue F
Vondacel Blue HH