Fast Red RC
Fast Red RC (CAS 4274-03-7) is a chemical compound supplied by Tech Serve Solutions. This red dye is primarily used as a chromogenic substrate for enzyme detection in various biochemical and diagnostic applications. It is known for its role in colorimetric assays and is available in tablet form, facilitating ease of use in laboratory settings. Its applications span across diagnostics, research, and quality control processes where enzyme activity needs to be visualized.

Chromogenic Substrate
Fast Red RC serves as a chromogenic substrate, producing a distinct colour upon enzymatic reaction. This property is invaluable for qualitative and quantitative detection of specific enzyme activities in biological samples and research assays.
Enzyme Detection Assays
It is widely employed in assays for enzymes such as alkaline phosphatase. The formation of an insoluble coloured precipitate allows for precise localization and assessment of enzyme presence and activity in techniques like Western blotting and immunohistochemistry.
Diagnostic Kits
The compound is incorporated into diagnostic kits for various biological and clinical testing procedures. Its reliable performance helps in the accurate identification of specific biomarkers through enzymatic colorimetric reactions.
| Form | tablet |
|---|

Hazard statements
- H302Harmful if swallowed
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
| Safety statements (S) | 22-24/25 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 RC used for?
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Fast Red RC is used as a chromogenic substrate for the detection of enzyme activities, particularly in biochemical assays, diagnostic kits, Western blotting, and immunohistochemistry.
What is the CAS number and formula for Fast Red RC?
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The CAS number for Fast Red RC is 4274-03-7. The chemical formula is not provided in the product data.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Fast Red RC in tablet form. The specific assay or purity is not detailed, and TSS does not represent this product as USP, BP, EP, or pharmaceutical grade.
What are the safety precautions for Fast Red RC?
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Fast Red RC is classified as harmful if swallowed (H302). When handling, it is advised to wear a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust.
How is Fast Red RC packed, shipped, and exported?
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Fast Red RC is supplied in tablet form. Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents, ensuring appropriate packaging and shipping methods are used.
How can I request a sample or quote for Fast Red RC?
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To request a sample or a quote for Fast Red RC, please contact the Tech Serve Solutions sales team through the website or via direct inquiry.
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