Acid Orange 7 CAS#633-96-5

density 

1.525[at 20℃]

vapor pressure 

0Pa at 25℃

storage temp. 

Amber Vial, -20°C Freezer, Under inert atmosphere

solubility 

Very soluble in water; very slightly soluble in ethanol

pka

8.26, 11.4(at 25℃)

Colour Index 

15510

form 

Crystalline Powder

color 

Green to blue

Odor

Odorless

PH Range

Amber (7.4) to orange (8.6);Orange (10.2) to red (11.8)

Water Solubility 

116 g/L (30 ºC)

ε(extinction coefficient)

≥17000 at 480-486nm in water at 0.01g/L
≥26500 at 225-231nm in water at 0.01g/L
≥7500 at 307-313nm in water at 0.01g/L

λmax

483nm

Merck 

14,6858

BRN 

3898201

Stability:

Light Sensitive

Major Application

Organic light emitting diodes (OLEDs), nanoparticles, inks, wood preservatives, textiles, hair dyes, cosmetics, wound dressing materials, biofuel cells

Biological Applications

Cosmetics; wound dressing materials

Cosmetics Ingredients Functions

COLORANT
HAIR DYEING

InChI

1S/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,19H,(H,20,21,22);/q;+1/p-1/b18-17+;

InChIKey

CQPFMGBJSMSXLP-ZAGWXBKKSA-M

SMILES

[Na+].Oc1ccc2ccccc2c1\N=N\c3ccc(cc3)S([O-])(=O)=O

LogP

-0.95 at 20℃

CAS DataBase Reference

633-96-5(CAS DataBase Reference)

EPA Substance Registry System

C.I. Acid Orange 7, monosodium salt (633-96-5)

Safety Information

Risk Statements 

36/37/38

Safety Statements 

26-36-37/39

WGK Germany 

3

RTECS 

DB7084000

TSCA 

TSCA listed

HS Code 

32041200

Storage Class

13 - Non Combustible Solids