C24H13Cl2N6Na3O10S3
781.5 g/mol
Dye & PigmentDanger
Reactive Orange 4
CAS70616-90-9EC274-701-7
Category
Dye & Pigment
Compound Class
Aromatic
Primary Use
Textile reactive dye
Reactive Orange 4 is a textile reactive dye used for coloring cellulosic fibers. It features a complex azo structure with sulfonate groups that enable covalent bonding with the substrate.
Dyeing of cotton and other cellulosic fibersTextile coloration in the reactive dyeing process
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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Related Compounds
StrongStructure SimilarSimilarity 0.89
Reactive Orange 13
CAS70616-89-6
Reactive dye for textiles
ReferenceSame Category
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acid dye for textiles
ReferenceSame Category
Acid Yellow 199
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acid dye for textiles
ReferenceSame Category
Cuprate(3-), (3-((5-(hydroxy-kappaO)-4-((1-(hydroxy-kappaO)-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo-kappaN1)-2-methylphenyl)azo)-1,5-naphthalenedisulfonato(5-))-, trisodium
CAS70956-20-6
Direct dye for textile coloring
ReferenceSame Category
Fluorescent brightener 184
CAS7128-64-5
optical brightener
Safety Reference
Danger
H317May cause an allergic skin reaction
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for Reactive Orange 4 (CAS 70616-90-9) is 2933.69.
HS code (international, 6-digit)
2933.69
EU CN code (8-digit)
2933 69 80
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
trisodium;2-[[6-[(4,6-dichloro-1,3,5-triazin-2-yl)-methylamino]-1-hydroxy-3-sulfonatonaphthalen-2-yl]diazenyl]naphthalene-1,5-disulfonate
InChIKey
ARXWHYHTMGGNST-UHFFFAOYSA-K
SMILES
CN(C1=CC2=CC(=C(C(=C2C=C1)O)N=NC3=C(C4=C(C=C3)C(=CC=C4)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])C5=NC(=NC(=N5)Cl)Cl.[Na+].[Na+].[Na+]
Synonyms (6)
- C.I. Reactive Orange 4
- Reactive Orange 4
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