ETHYL ORANGE Chemical Properties

Melting point:

>300°C

solubility 

Very soluble in water; very slightly soluble in ethanol

pka

4.34(at 25℃)

form 

Powder

color 

Orange

PH Range

Red (3.4) to yellow (4.8)

λmax

474nm

BRN 

3821641

Major Application

Lithographic plate preparation, holographic storage, hybrid materials, inks, surface probes, diagnostic agents for diseases related with amyloid accumulation

CAS DataBase Reference

62758-12-7(CAS DataBase Reference)

EPA Substance Registry System

Benzenesulfonic acid, 4-[[4-(diethylamino)phenyl]azo]-, sodium salt (62758-12-7)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36-24/25

WGK Germany 

3

TSCA 

Yes

HS Code 

29270000

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

ETHYL ORANGE Usage And Synthesis

Chemical Properties

orange crystalline powder

Uses

Indicator: pH 3.0 (red) to pH 4.5 (yellow)

Purification Methods

Recrystallise it twice from water. [Beilstein 16 IV 511.]

ETHYL ORANGE(62758-12-7)Related Product Information

• Benzenesulfonic acid
• Ethyl Orange, indicator grade, pure,Ethyl orange Benzenesulfonic acid, 4-[(4-diethylamino)phenylazo]-, potassium salt
• ETHYL ORANGE
• Methyl Orange
• N-ETHYL-4-AMINOAZOBENZENE
• N,N-Diethyl-1,4-phenylenediamine
• 4'-Aminoazobenzene-4-sulphonic acid
• Solvent Yellow 2
• Solvent Yellow 56
• 4-ETHYLMETHYLAMINOAZOBENZENE