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CROCEIN SCARLET 7B

Basic information Safety Supplier Related

CROCEIN SCARLET 7B Basic information

Product Name:
CROCEIN SCARLET 7B
Synonyms:
  • CROCEIN SCARLET 7B
  • CI 27165
  • CI NO 27165
  • ACID RED 71
  • ACID ORANGE 12
  • CROCEIN SCARLET 7B C.I. NO. 27165
  • 1-Naphthalenesulfonic acid, 7-hydroxy-8-2-methyl-4-(2-methyl-4-sulfophenyl)azophenylazo-, disodium salt
  • C.I. ACID RED 71)
CAS:
6226-76-2
MF:
C24H18N4Na2O7S2
MW:
584.53
EINECS:
612-981-8
Mol File:
6226-76-2.mol
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CROCEIN SCARLET 7B Chemical Properties

Melting point:
181-188℃
form 
Powder
Colour Index 
27165
Water Solubility 
Soluble in water
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Safety Information

Safety Statements 
22-24/25
WGK Germany 
3
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CROCEIN SCARLET 7B Usage And Synthesis

Uses

Crocein Scarlet 7B is used in Crowle’s reagent. The reagent is needed for observing latent fingerprints, particularly bloody prints. Dyes and metabolites.

Preparation

2′,3-Dimethyl-4-amino-4′-sulfoazobenzene?diazo, and 7-Hydroxynaphthalene-1-sulfonic acid coupling.

Properties and Applications

red. Soluble in water for product red, soluble in ethanol for red orange. The strong sulfuric acid for blue, pink is diluted. In water solution to join strong hydrochloric acid for product red; Add thick sodium hydroxide solution for shallow red sauce.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 5-6 2-3 2-3 2 1 2-3

CROCEIN SCARLET 7BSupplier

Tianjin heowns Biochemical Technology Co., Ltd.
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400 638 7771
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sales@heowns.com
Spectrum Chemical Manufacturing Corp.
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021-021-021-67601398-809-809-809 15221380277
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marketing_china@spectrumchemical.com
Alfa Chemistry
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1-516-6625404
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support@alfa-chemistry.com
Shanghai YuanYe Biotechnology Co., Ltd.
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18021002903
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3008007409@qq.com
Tianjin heowns Biochemical Technology Co., Ltd.
Tel
400-6387771-6037 18920794737
Email
sales@heowns.com