Direct Black 38 is a synthetic azo dye historically used as a direct dye for textiles. It is a salt-like compound with multiple aromatic rings and amine groups, and technical-grade material has been identified as a potential carcinogen by scientific experts.
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CAS 1937-37-7
Direct black 19
Direct dye for textiles
Acid Black 234
acid dye for textiles
Acid Green 20
Acid dye for textiles
Direct green 1
Direct dye for cellulose fibers
Direct yellow 50
direct dye for textiles
Direct blue 71
direct dye for textiles
Direct violet 9
direct dye for textiles
Direct Green 26
direct dye for textiles
The international HS code for Direct Black 38 (CAS 1937-37-7) is 3204.14.
3204.14
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.
disodium;4-amino-3-[[4-[4-[(2,4-diaminophenyl)diazenyl]phenyl]phenyl]diazenyl]-5-hydroxy-6-phenyldiazenylnaphthalene-2,7-disulfonate
XRPLBRIHZGVJIC-UHFFFAOYSA-L
C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)C5=CC=C(C=C5)N=NC6=C(C=C(C=C6)N)N)N)O.[Na+].[Na+]