Fluorescent Brightener 220 is a sulfonated stilbene-based compound used as a fluorescent whitening agent, primarily applied to textiles to enhance brightness and reduce yellowing. Its structure includes multiple sulfonate groups and alcohol-containing side chains, contributing to its water solubility and affinity for cellulosic fibers.
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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Fluorescent Brightener 353
fluorescent brightener for textiles
2,6-Naphthalenedisulfonic acid disodium salt
Dye intermediate
Acid red 88
Acid dye for textile coloring
2,7-Naphthalenedisulfonic acid, 4-(acetylamino)-5-hydroxy-, disodium salt
Naphthalene sulfonate dye intermediate
6-hydroxy-2-naphthoic acid
Precursor to azo dyes and pigments
Fluorescent brightener 85
fluorescent whitening agent
Fluorescent Brightener 113
fluorescent whitening agent
The international HS code for Fluorescent Brightener 220 (CAS 16470-24-9) is 3204.20.
3204.20
3204 20 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
tetrasodium;5-[[4-[bis(2-hydroxyethyl)amino]-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-2-[(E)-2-[4-[[4-[bis(2-hydroxyethyl)amino]-6-(4-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]ethenyl]benzenesulfonate
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C1=CC(=CC=C1NC2=NC(=NC(=N2)N(CCO)CCO)NC3=CC(=C(C=C3)/C=C/C4=C(C=C(C=C4)NC5=NC(=NC(=N5)NC6=CC=C(C=C6)S(=O)(=O)[O-])N(CCO)CCO)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]
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