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disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate

Basic information Safety Supplier Related

disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate Basic information

Product Name:
disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
Synonyms:
  • disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
  • orange B
  • 4,5-Dihydro-5-oxo-4-[[4-(sodiooxysulfonyl)-1-naphthyl]azo]-1-[4-(sodiooxysulfonyl)phenyl]-1H-pyrazole-3-carboxylic acid ethyl
  • 4,5-Dihydro-5-oxo-4-[[4-(sodiooxysulfonyl)-1-naphtyl]azo]-1-[4-(sodiooxysulfonyl)phenyl]-1H-pyrazole-3-carboxylic acid ethyl ester
  • C.I.19235
  • C.I.Acid Orange 137
  • Sodium (E)-4-[[3-(Ethoxycarbonyl)-5-oxo-1-(4-sulfonatophenyl)-4,5-dihydro-4-pyrazolyl]diazenyl]naphthalene-1-sulfonate
  • Orange 137
CAS:
15139-76-1
MF:
C22H19N4NaO9S2
MW:
570.52
EINECS:
239-201-5
Mol File:
15139-76-1.mol
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disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate Chemical Properties

color 
Dull orange crystals
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Safety Information

Hazardous Substances Data
15139-76-1(Hazardous Substances Data)
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disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate Usage And Synthesis

Uses

In coloring sausage and frankfurter casings.

Preparation

Phenylhydrazine-4-sulfonic acid?and 2-Hydroxymaleic acid?ethyl ester derivatives of the sodium reaction, and partly hydrolysis, lost a ethyl, finally and diazo of 4-Aminonaphthalene-1-sulfonic acid matches.

Safety Profile

: When heated to decomposition emits toxic fumes of SOx.

Properties and Applications

dark orange. The strong sulfuric acid for purple, diluted into red; In strong hydrochloric acid for red; In 10% of sodium hydroxide solution for yellow orange, yellow light is palm diluted.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO
AATCC

disodium 3-ethyl 4,5-dihydro-5-oxo-4-[(4-sulphonato-1-naphthyl)azo]-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylateSupplier

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