CI 13015 Property

Melting point:

>300°C

storage temp. 

Room Temperature

solubility 

Solubility Soluble in water, ethanol

pka

11.5, 11.9(at 25℃)

form 

Powder

Colour Index 

14270

color 

Rust to dark brown

PH Range

Yellow (11.0) to red (12.7)

PH

11-13

Odor

Odorless

Water Solubility 

Soluble in water and alcohol

λmax

490nm

Merck 

14,9775

BRN 

4173410

Major Application

Photoresists, image forming materials, nonlinear optical (NLO) materials, etching, photography, inks, markers, lithium battery, leather dyes, polishing stainless steel, concrete, automobile radiators, textiles, cleaners, hair dyes, food storage, cosmetics, immunomodulating agents, disinfectant, antihistaminic agent, antimicrobial agent, nucleic acids

LogP

1.673 (est)

CAS DataBase Reference

547-57-9(CAS DataBase Reference)

EPA Substance Registry System

Benzenesulfonic acid, 4-[(2,4-dihydroxyphenyl)azo]-, monosodium salt (547-57-9)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38-41-37/38-22

Safety Statements 

26-36-36/37/39

WGK Germany 

1

RTECS 

DB5035000

TSCA 

Yes

HS Code 

32041200

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

CI 13015 Chemical Properties,Usage,Production

Chemical Properties

Rust to dark brown powder

Uses

Sodium (E)-4-(2, 4-Dihydroxyphenyl)diazenyl)benzenesulfonate is a food and an azo dye. Dyes and metabolites, Environmental Testing

Uses

As indicator. pH: yellow 11, orange-brown 12.7. Occasionally used as plasma stain.

Preparation

4-Aminobenzenesulfonic acid diazo, Coupled with resorcinol.

Properties and Applications

yellow orange. Soluble in water for golden brown, soluble in ethanol lemon yellow, soluble in acetone and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for yellow, diluted for lemon yellow; In nitric acid solution for yellow. Its water solution to join strong hydrochloric acid for golden brown; Add thick sodium hydroxide solution for palm orange. Used for wool, silk, cotton, vinegar, polyamide fiber and fiber dyeing. Also used in leather, biological dyeing, also used in indicator (pH 12 ~ 14).