Direct Red 81
Direct Red 81 (CAS 2610-11-9), molecular formula C29H19N5Na2O8S2, is a high-purity chemical supplied by Tech Serve Solutions for cell biology applications, to pharmacopoeia specification (USP, BP, EP). Every batch is tested and ships with a Certificate of Analysis; MSDS and technical data sheets are available on request. Tech Serve Solutions has supplied laboratory reagents, fine chemicals and pharmaceutical intermediates worldwide since 1998.
- IUPAC
- DR 81,Disodium 7-benzamido-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate
| Molecular weight | 675.60 |
|---|---|
| Empirical formula | C29H19N5Na2O8S2 |
| Melting point | 240 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| 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 | 28160 |
|---|---|
| Absorption | λmax 397 nmλmax 508 nm (2nd) |
Documentation
Supplied to USP, BP and EP standards. Every batch ships with a Certificate of Analysis (assay, identity, purity); MSDS 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 Direct Red 81?
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Direct Red 81 (CAS 2610-11-9), molecular formula C29H19N5Na2O8S2, is a high-purity chemical supplied by Tech Serve Solutions for cell biology applications, to USP, BP and EP standards.
What grades of Direct Red 81 does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Direct Red 81 in USP, BP, EP and reagent/AR grades. Custom specifications for nutraceutical or specialty pharmaceutical applications are available — contact our technical sales team.
What is the CAS number and molecular formula of Direct Red 81?
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Direct Red 81 has CAS number 2610-11-9 and molecular formula C29H19N5Na2O8S2. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for Direct Red 81?
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Sample quantities are available for technical evaluation; bulk MOQ depends on grade and packaging. In-stock material typically ships in 7–10 working days; custom-spec orders take 3–4 weeks. Tech Serve Solutions ships worldwide with full export documentation.
Do you provide a Certificate of Analysis (CoA) with each shipment?
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Yes. Every batch of Direct Red 81 ships with a Certificate of Analysis covering assay, identity and purity tests, plus pharmacopoeia conformance where applicable. MSDS and TDS documents are available on request before order placement.
How should Direct Red 81 be stored?
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Store Direct Red 81 in its original sealed container in a cool, dry place away from direct sunlight and incompatible materials, in line with the storage guidance on the Safety Data Sheet. Reseal between dispensings.
What is Direct Red 81 used for?
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Direct Red 81 is used in cell biology applications across pharmaceutical, research and industrial settings. Our technical team can advise on suitability for your specific process.
How do I request a quote for Direct Red 81?
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Request a quote with your required grade, quantity and destination via https://www.techservesolutions.in/contact or email info@techservesolutions.in. We respond with specifications, a Certificate of Analysis and pricing.
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