Molekula
Pyridine 99.5%
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Pyridine 99.5% is a basic, heterocyclic organic compound with a distinctive aromatic odor, widely used as a solvent, intermediate in pharmaceuticals, agrochemicals, and rubber production. It also serves in chemical synthesis, dye manufacturing, and as a corrosion inhibitor. This high-purity reagent meets strict quality standards with a CAS number of 110-86-1, molecular formula C5H5N, and molecular weight of 79.10 g/mol. Store at ambient conditions in a well-ventilated area, as it carries a **Danger** signal word due to its flammability and toxicity. Molekula supplies Pyridine 99.5% 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 |
|---|---|
| Water | ≤0.1% |
| Colour | ≤10 Hazen (APHA) |
| Assay | ≥99.5% |
| Residue | ≤0.002% |
| Total Impurities (spec. and unspec.) | ≤0.05% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 17 °C |
| Transport Class | 3 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless to yellow liquid. |
| Odour | Sharp, nauseating |
| Melting Point | -42 °C |
| Boiling Point | 115 °C |
| Density | 0.98 (relative, water = 1) |
| Vapour Pressure | 2 kPa at 20 °C |
| Refractive Index | 1.50920 |
| pKa | pKa = 5.23 |
| log P (octanol/water) | 0.65 |
Source: PubChem CID 1049 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90030473 |
| CAS Number | 110-86-1 |
| IUPAC Name | pyridine |
| EC Number | 203-809-9 |
| Molecular Formula | C5H5N |
| Molecular Weight | 79.10 |
| Exact Mass | 79.0422 |
| SMILES | C1=CC=NC=C1 |
| InChIKey | JUJWROOIHBZHMG-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H5N/c1-2-4-6-5-3-1/h1-5H |
| PubChem CID | 1049 |
| UN Number | UN1282 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933310000 |
| Tariff Code | 2933310000 |
Safety & GHS
-
Flammable
GHS02
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H225 Highly flammable liquid and vapour
- H302 + H312 + H332 Harmful if swallowed, in contact with skin or if inhaled
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H351 Suspected of causing cancer
- H370 Causes damage to organs
- H372 Causes damage to organs through prolonged or repeated exposure
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P231 Handle under inert gas
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Azabenzene
- Azine
- CP 32
- FEMA No. 2966
- FEMA Number 2966
- Piridina
- Pirydyna
- Pyridin
- pyridine ion (1-), hydrogen
- RCRA waste number U196
Frequently asked questions
What is pyridine (99.5%) commonly used for?
Pyridine is primarily used as a solvent, intermediate in pharmaceutical synthesis, and in the production of pesticides, dyes, and rubber chemicals.
What is the chemical formula and molecular weight of pyridine?
The chemical formula is **C₅H₅N**, and the molecular weight is **79.10 g/mol**.
How should pyridine (99.5%) be stored?
Store in a tightly sealed container at **ambient temperature**, away from heat, sparks, and open flames.
What purity grade is available for pyridine from Molekula?
Molekula supplies pyridine at **99.5% purity** as standard.
Can Molekula supply pyridine in bulk quantities?
Yes, bulk quantities of pyridine (99.5%) are available upon request—contact us for pricing and logistics details.
What documentation comes with a pyridine order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.