6-Mercaptopyridine-3-carboxylic acid
6-Mercaptopyridine-3-carboxylic acid (CAS: 92823-43-3, Formula: C6H5NO2S) is a heterocyclic organic compound with a molecular weight of 155.17 g/mol. This compound serves as a valuable building block in chemical synthesis, particularly within the realm of heterocyclic chemistry. Its structure, featuring both a thiol and a carboxylic acid group on a pyridine ring, lends itself to diverse synthetic transformations for the development of complex molecules.
- IUPAC
- 6-Mercaptonicotinic acid

Organic Synthesis Intermediate
This compound functions as a versatile intermediate in the synthesis of various organic molecules. The presence of both a mercapto group and a carboxylic acid group allows for multiple reaction pathways.
Heterocyclic Chemistry
As a substituted pyridine derivative, it is employed in the construction of more complex heterocyclic systems. These structures are often found in pharmaceuticals and agrochemicals.
Research and Development
Used in research laboratories for exploring novel synthetic routes and developing new chemical entities. Its unique functional groups make it a target for derivatization studies.
| Molecular weight | 155.17 |
|---|---|
| Empirical formula | C6H5NO2S |
| Assay | 90% |
| Melting point | 260-262 °C (dec.)(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 |
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 6-Mercaptopyridine-3-carboxylic acid used for?
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6-Mercaptopyridine-3-carboxylic acid is primarily used as a building block in organic synthesis, particularly for creating complex heterocyclic structures in research and development settings.
What are the CAS number and molecular formula for this compound?
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The CAS number is 92823-43-3, and the molecular formula is C6H5NO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 6-Mercaptopyridine-3-carboxylic acid with an assay of 90%. We do not represent this product as USP, BP, or EP grade.
How should 6-Mercaptopyridine-3-carboxylic acid be handled?
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Handle with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust. This compound is classified as a Warning with hazards H315, H319, and H335, indicating it may cause skin irritation, serious eye irritation, and respiratory irritation.
Is 6-Mercaptopyridine-3-carboxylic acid available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 6-Mercaptopyridine-3-carboxylic acid.
How can I request a quote or sample?
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Please contact our sales team through the website or via direct inquiry to request a quotation or a product sample.
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