Basic information
CAS NO
633-96-5
EINECS
211-199-0
Molecular Formula
C16H11N2O4SNa
Molecular Weight
350.3243
English Name
acid orange 7
Synonyms
C.I. 15510, C.I. Acid Orange 7, C.I. Acid Orange 7, monosodium salt, D & C Orange no. 4, Orange II sodium salt, 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate, Orange Ⅱ, Acid Orange II Lake, Pigment Orange 17 (15510:1), sodium 4-[(2E)-2-(2-oxonaphthalen-1(2H)-ylidene)hydrazino]benzenesulfonate, sodium 4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate
Physical and Chemical Properties
Melting point
164℃
Water Solubility
116 g/L (30℃)
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