Acid Orange 7, commonly known as Orange II, is a member of naphthalenes used as an acid dye for textiles. It is also found in consumer products for commercial, institutional, and inside-the-home applications, including hair dressing.
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.
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Acid Red 151
synthetic acid dye
Sunset yellow FCF
Food colorant
Acid blue 158
acid dye for textiles
Acid Red 183
acid dye for textiles
Tracid Brilliant Red B
acid dye for textiles
Acid Orange 56
acid dye for textiles
7-(Acetylamino)-4-hydroxy-2-naphthalenesulfonic acid
Naphthalene sulfonic acid dye intermediate
2-Amino-4-chloro-5-nitrophenol
dye intermediate
The international HS code for Orange II (CAS 633-96-5) is 3204.12.
3204.12
3204 12 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
sodium 4-[(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate
CQPFMGBJSMSXLP-UHFFFAOYSA-M
C1=CC=C2C(=C1)C=CC(=C2N=NC3=CC=C(C=C3)S(=O)(=O)[O-])O.[Na+]
Sourcing Orange II?
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