3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester
3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester (CAS 68181-17-9), molecular formula C12H12N2O4S2, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis 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
- N-Succinimidyl 3-(2-pyridyldithio)propionate,SPDP

| Molecular weight | 312.36 |
|---|---|
| Empirical formula | C12H12N2O4S2 |
| Assay | ≥95% |
| Form | powder |
| Solubility | acetone: soluble50 mg/mLDMF: soluble |
| Storage temperature | −20°C |
| Application | A heterobifunctional cross-linking reagent with amine and sulfhydryl reactivity. Typically, coupled initially to molecules containing primary amines by amide bonds buffered at pH 7.5 (6.5-8.5). Second coupling specific for molecules containing free sulfhydryl by thiol-disulfide exchange buffered at pH 8.0 (7.5-8.5). Alternately, this reagent may be used as a protected thiolating reagent following initial coupling and reduction of linker. Useful for preparation of enzyme immunoconjugates and hapten carrier molecule conjugates. Incorporates 4 atom linker. |
| Melting point | 84-86 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester?
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3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester (CAS 68181-17-9), molecular formula C12H12N2O4S2, is a high-purity chemical supplied by Tech Serve Solutions for chemical synthesis applications, to USP, BP and EP standards.
What grades of 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester 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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester?
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3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester has CAS number 68181-17-9 and molecular formula C12H12N2O4S2. Full specifications appear in the table above and in the Certificate of Analysis.
What is the typical minimum order quantity and lead time for 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester?
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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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester 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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester be stored?
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Store 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester 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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester used for?
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3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester is used in chemical synthesis 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 3-(2-Pyridyldithio)propionic acid N-hydroxysuccinimide ester?
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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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