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CHROMOTROPE 2B

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CHROMOTROPE 2B Basic information

Product Name:
CHROMOTROPE 2B
Synonyms:
  • 2,7-Naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-nitrophenyl)azo-]-,disodiumsalt
  • 7-naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-nitrophenyl)azo]-disodium
  • AcidRed176(16575)
  • Chromotropicacid2B
  • C.I.Acid Red 176
  • C.I.Mordant Black 93
  • Chromotrope Red 4B
  • Sodium 2-(p-nitrophenylazo)chromotropate
CAS:
548-80-1
MF:
C16H12N3NaO10S2
MW:
493.39
EINECS:
208-959-9
Mol File:
548-80-1.mol
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CHROMOTROPE 2B Chemical Properties

Melting point:
300 °C
Colour Index 
16575
form 
Crystalline Powder
color 
Dark green to dark purple
Merck 
14,2240
BRN 
4109733
CAS DataBase Reference
548-80-1(CAS DataBase Reference)
EPA Substance Registry System
2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-nitrophenyl)azo]-, disodium salt (548-80-1)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
3
TSCA 
Yes

MSDS

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CHROMOTROPE 2B Usage And Synthesis

Chemical Properties

dark green to dark purple crystalline powder

Uses

Chromotrope 2B is a chromotropic acid azo dye and a groundwater pollutant removed from the environment via photoelectrochemical mineralization.

Uses

As a dye; as a reagent for boric acid or borates.

Preparation

4-Nitrobenzenamine diazo, and 4,5-Dihydroxynaphthalene-2,7-disulfonic acid?coupling.

Properties and Applications

blue-ray red. Soluble in water for yellow light red, not soluble in alcohol. The strong sulfuric acid for dark purple, diluted into yellow light red solution. In water solution to join hydrochloric acid solution to become yellow, add sodium hydroxide for blue-ray red.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 6-7 4 4 4-5

CHROMOTROPE 2B Preparation Products And Raw materials

Raw materials

N-Methyl-4-nitroanilineCHROMOTROPIC ACID SODIUM SALT

CHROMOTROPE 2BSupplier

J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Email
jkinfo@jkchemical.com
Alfa Aesar
Tel
400-6106006
Email
saleschina@alfa-asia.com
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Email
Sales-CN@TCIchemicals.com
Energy Chemical
Tel
021-021-58432009 400-005-6266
Email
sales8178@energy-chemical.com
Shanghai Hanhong Scientific Co.,Ltd.
Tel
021-54306202 13764082696;
Email
info@hanhongsci.com
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