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Acid Yellow 25

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Acid Yellow 25 / CAS : 6359-85-9

Appearance Soluble in water. Slightly soluble in ethanol and acetone. The aqueous solution is yellow, and the color does not change when sodium hydroxide is added; It becomes turbid in cold. It is yellow in concentrated sulfuric acid and produces fluorescent yellow precipitation after dilution. UN 0
HS 32041200 DG Class 0
Synonyms Belacid Yellow R; Optamine Yellow R; Novamina Yellow R; C.I. 18835; Oxanal Yellow R; C.I. ACID Yellow 25; Midlon Yellow R; Fast Yellow Mr; Lanaperl Yellow R; Supramine Yellow R; Supracid Yellow R; Acidyellower; C.I.Acidyellow25; 1H-Pyrazole,5-Oxo-4,5-Dihydro-3-Methyl-4-[[3-[(Phenylamino)Sulfonyl]-4-Methylphenyl]Azo]-1-(4-Sulfophenyl)-,Sodiumsalt; Sodium,4-[3-Methyl-4-[[4-Methyl-3-(Phenylsulfamoyl)Phenyl]Diazenyl]-5-Oxo-4H-Pyrazol-1-Yl]Benzenesulfonate; Benzenesulfonic Acid, 4-4,5-Dihydro-3-Methyl-4-4-Methyl-3-(Phenylamino)Sulfonylphenylazo-5-Oxo-1H-Pyrazol-1-Yl-, Monosodium Salt; Acid Fast Yellow Er; Covanyl Yellow Rn
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TT in Adv &
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Properties

Summary

Formula
C23H20N5NaO6S2
Molecular Mass
549.55500
Exact Mass
549.07500
PSA
177.52000
Logp
5.31010
IUPAC
sodium;4-[3-methyl-4-[[4-methyl-3-(phenylsulfamoyl)phenyl]diazenyl]-5-oxo-4H-pyrazol-1-yl]benzenesulfonate
SMILES
CC1=C(C=C(C=C1)N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)[O-])C)S(=O)(=O)NC4=CC=CC=C4.[Na+]

Attribute classification

Matter Classification
organic
Category
Dyestuffs and Pigments > Acid Dyes

Chemical and Physical Properties

Density
1.5 g/cm3
Appearance
Soluble in water. Slightly soluble in ethanol and acetone. The aqueous solution is yellow, and the color does not change when sodium hydroxide is added; It becomes turbid in cold. It is yellow in concentrated sulfuric acid and produces fluorescent yellow precipitation after dilution.

Export information

HS Code
32041200
Export Rebate
0%
UN No.
0
DG-Class
0

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