C32H20Cu2N6Na4O16S4
1091.9 g/mol
Dye & PigmentDanger
DIRECT BLUE 218
CAS28407-37-6EC249-008-8
Category
Dye & Pigment
Compound Class
Organometallic
Primary Use
Direct dye for cellulose and textiles
Direct Blue 218 is a direct dye used for coloring cellulose and textile materials. It is classified by the International Agency for Research on Cancer (IARC) as Group 2B, meaning it is possibly carcinogenic to humans based on limited evidence of carcinogenicity in humans and sufficient evidence in experimental animals.
Direct dye for celluloseDye for textiles
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 28407-37-6
Related Compounds
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Referencesame scaffold
Evans blue
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biological stain dye
Safety Reference
Danger
H350May cause cancer
H303May be harmful if swallowed
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for DIRECT BLUE 218 (CAS 28407-37-6) is 3204.14.
HS code (international, 6-digit)
3204.14
EU CN code (8-digit)
3204 14 00
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-hydroxyphenyl]-2-hydroxyphenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate;copper
InChIKey
UIECJCJNZREJPJ-UHFFFAOYSA-J
SMILES
C1=CC(=C(C=C1C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C(C=C4C=C3S(=O)(=O)[O-])S(=O)(=O)[O-])N)O)O)O)N=NC5=C(C6=C(C=C(C=C6C=C5S(=O)(=O)[O-])S(=O)(=O)[O-])N)O.[Na+].[Na+].[Na+].[Na+].[Cu].[Cu]
Synonyms (17)
- Amanil Supra Blue 9GL
- CI Direct Blue 218
- DIRECT BLUE 218
- Fastusol Blue 9GLP
- NCI C60877
- Pontamine Bond Blue B
- Pontamine Fast Blue 7GLN
- Solantine Blue 10GL