tetrasodium 4-amino-5-hydroxy-3,6-bis[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate [1] Reaction products of 4-amino-5-hydroxynaphthalene-2,7-disulfonic acid, coupled twice with diazotized 2-[(4-aminophenyl)sulfonyl]ethyl hydrogen sulfate, sodium salts [2] disodium 4-amino-5-hydroxy-3,6-bis{[4-(vinylsulfonyl) phenyl]diazenyl}naphthalene-2,7-disulfonate [3]
CAS 17095-24-8 · C26H21N5Na4O19S6
Hazard classDanger — Health hazard
PictogramsHealth hazard
H-statements- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H317 May cause an allergic skin reaction
Common uses (US EPA CDR)Dye
SynonymsC.I. REACTIVE BLACK 5 · RefChem:1080570 · Reactive Black 5 · Remazol black B · Diamira Black B · Sumifix Black B · Cavalite Black B · Remazol Black GF
Molecular weight991.8 g/mol
Data sourceHarmonised classification ECHA — EU CLP Annex VILegally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.
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