Molekula
Pyridine-3-sulfonic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Pyridine-3-sulfonic acid is a heterocyclic organic compound used in pharmaceutical synthesis and as a reagent in organic chemistry. It appears as a white to pale yellow crystalline solid. CAS: 636-73-7, Molecular formula: C5H5NO3S, Molecular weight: 159.16 g/mol, Storage: Ambient, Signal word: Danger. Molekula supplies Pyridine-3-sulfonic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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100 g — $147.70 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white powder |
| Melting Point | ≥340℃ |
| Water | ≤0.4% |
| Assay | ≥98% |
| Mercury (Hg) | ≤100ppm |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 67 °C |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 15933208 |
| CAS Number | 636-73-7 |
| IUPAC Name | pyridine-3-sulfonic acid |
| EC Number | 211-265-9 |
| Molecular Formula | C5H5NO3S |
| Molecular Weight | 159.16 |
| Exact Mass | 158.999 |
| SMILES | C1=CC(=CN=C1)S(=O)(=O)O |
| InChIKey | DVECLMOWYVDJRM-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H5NO3S/c7-10(8,9)5-2-1-3-6-4-5/h1-4H,(H,7,8,9) |
| PubChem CID | 69468 |
| UN Number | UN2585 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29333961 |
| Tariff Code | 2933399990 |
Safety & GHS
-
Corrosive
GHS05
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H318 Causes serious eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 3-Pyridinesulfonic acid
- 3-Pyridylsulfonic acid
- 3-Sulfopyridine
- beta-Sulfopyridine
- Ethyl 3-[(Tetrahydropyranyl)oxy]butanoate
- Pyridin-3-sulfonic acid
- Pyridine-3-sulphonic acid
- pyridine, 3-sulpho-
- VXH
Frequently asked questions
What is Pyridine-3-sulfonic acid used for?
It is primarily used as an intermediate in the synthesis of pharmaceuticals and agrochemicals.
What is the chemical formula and molecular weight of Pyridine-3-sulfonic acid?
The formula is C5H5NO3S with a molecular weight of 159.16 g/mol.
How should Pyridine-3-sulfonic acid be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade is available for Pyridine-3-sulfonic acid?
It is available in technical grade; custom purity levels may be requested.
Can Molekula supply Pyridine-3-sulfonic acid in bulk?
Yes, Molekula can supply bulk quantities—please contact sales for pricing and availability.
What documentation comes with an order of Pyridine-3-sulfonic acid?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.