Fast Red TR Salt hemi(zinc chloride) salt
Fast Red TR Salt hemi(zinc chloride) salt (CAS: 89453-69-0) is a diazonium salt intermediate with the empirical formula C7H6Cl2N2 · 0.5 ZnCl2 and a molecular weight of 257.19. It functions as a key component in colorimetric detection methods, particularly for enzyme-linked assays. This reagent is primarily utilised in biochemical research and diagnostic applications where precise colour development is required for quantitative analysis.
- IUPAC
- 4-Chloro-2-methylbenzenediazonium salt,Azoic Diazo No. 11
- Synonyms
- 4-Chloro-2-methylbenzenediazonium zinc chloride, Azoic Diazo No. 11

Enzyme Substrate for Colorimetric Assays
Fast Red TR Salt hemi(zinc chloride) salt is employed as a chromogenic substrate in assays involving enzymes such as alkaline phosphatase. It reacts to produce a coloured precipitate, enabling spectrophotometric detection and quantification.
Histochemical Staining
This compound can be used in histochemical staining techniques to localise enzyme activity within tissue samples. The resulting colour allows for visual identification of enzyme-rich areas under microscopic examination.
Biochemical Research
Its utility extends to various biochemical research applications, including the development of diagnostic kits and the study of enzyme kinetics where a reliable colourimetric indicator is needed.
| Molecular weight | 257.19 |
|---|---|
| Empirical formula | C7H6Cl2N2 · 0.5 ZnCl2 |
| Storage temperature | −20°C |
| Composition | Dye content, >90% |
Precautionary statements
- P273Avoid release to the environment
| Water hazard class (WGK, DE) | 3 |
|---|
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 37085 |
|---|---|
| Absorption | λmax 284 nm |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Fast Red TR Salt hemi(zinc chloride) salt used for?
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Fast Red TR Salt hemi(zinc chloride) salt is used as a chromogenic substrate for enzyme detection, particularly with alkaline phosphatase, in biochemical assays and histochemical staining.
What is the CAS number and formula for Fast Red TR Salt hemi(zinc chloride) salt?
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The CAS number is 89453-69-0, and the empirical formula is C7H6Cl2N2 · 0.5 ZnCl2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Fast Red TR Salt hemi(zinc chloride) salt with a dye content of >90%. This product is not represented as USP, BP, or EP grade.
What are the safety and handling precautions for this chemical?
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According to the safety data, this chemical is classified with GHS hazard statement P273 (Avoid release to the environment). Handle with appropriate personal protective equipment and follow standard laboratory safety protocols. Ensure adequate ventilation.
How is this chemical packed and shipped?
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Fast Red TR Salt hemi(zinc chloride) salt is stored at -20°C. Tech Serve Solutions is a global supplier and exporter of fine chemicals and reagents.
How can I request a quote or sample?
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To request a quote or sample, please contact the Tech Serve Solutions sales team through our website or by phone. Our team will assist you with your inquiry.
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