Fast Red Violet LB Salt ≥90% (dye content), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY
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Synonyms: 5-Chloro-4-benzamido-2-methylbenzenediazonium chloride hemi(zinc chloride) salt

M-Clarity™ quality level = MQ100

F3381-100MG F3381-1G F3381-250MG F3381-500MG F3381-5G
F3381-100MGEA 27.7 GBP
F3381-100MG F3381-1G F3381-250MG F3381-500MG F3381-5G
Fast Red Violet LB Salt ≥90% (dye content), Sigma-Aldrich®
Fast Red Violet LB Salt

Fast Red Violet LB Salt has been used for the detection of tartrate-resistant acid phosphatase (TRAP) in tissue sections.


Fast Red Violet LB Salt, also known as 4′-amino-2′-chloro-5′-methylbenzanilide. It is a lipophilic amine with an aromatic system of moderate size and a hydrophilic diazonium cation. The diazonium salt is available commercially as a zinc chloride double salt. It comprises ≥90% dye content.

Formula: C₁₄H₁₁Cl₂N₃O
MW: 376,31 g/mol
Storage Temperature: Room Temperature
MDL Number: MFCD00011892
CAS Number: 32348-81-5
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Specification Test Results

Appearance (Form) Powder
Infrared spectrum Conforms to Structure
Carbon Content 40.2 - 49.1%
Nitrogen Content 10.1 - 12.3%
Dye Content ≥90%
Solubility (Turbidity), 1 mg/ml, Water Clear to Slightly Hazy
Solubility (Colour) Very Faint Yellow to Yellow

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