Molekula
4-Hydroxypyridine (4-Pyridinol)
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
4-Hydroxypyridine (4-pyridinol) is a heterocyclic organic compound with a hydroxyl group attached to the pyridine ring, primarily used in pharmaceutical synthesis, agrochemicals, and as a precursor for various chemical derivatives. It appears as a white to off-white crystalline solid with a faint odor. Key specifications include a CAS number of 626-64-2, molecular formula C5H5NO, and a molecular weight of 95.10 g/mol. Store at ambient conditions; handle with caution as it carries a "Danger" signal word. Molekula supplies 4-Hydroxypyridine 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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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100 g — £62.30 per pack ex VAT · £74.76 inc. VAT
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 slightly yellow crystalline powder |
| Water | ≤1.00% |
| Single Impurity | ≤1.00% |
| Assay | 98.00-102.00% |
| Total Impurities | ≤1.50% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.39 mmHg |
Source: PubChem CID 12290 (Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 66558004 |
| CAS Number | 626-64-2 |
| IUPAC Name | 1H-pyridin-4-one |
| EC Number | 210-958-3 |
| Molecular Formula | C5H4N(OH) |
| Molecular Weight | 95.10 |
| Exact Mass | 95.0371 |
| SMILES | C1=CNC=CC1=O |
| InChIKey | GCNTZFIIOFTKIY-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H5NO/c7-5-1-3-6-4-2-5/h1-4H,(H,6,7) |
| PubChem CID | 12290 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.39.9200 |
| Tariff Code | 2933399999 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
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.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is 4-Hydroxypyridine (4-Pyridinol) commonly used for?
4-Hydroxypyridine is primarily used as a precursor in organic synthesis, pharmaceuticals, and agrochemicals, including as an intermediate for herbicides and APIs.
What is the chemical formula and molecular weight of 4-Hydroxypyridine?
The chemical formula is **C₅H₅NO** (or C₅H₄N(OH)), and the molecular weight is **95.10 g/mol**.
What safety classification and storage conditions apply to this product?
This product has a **Signal Word: Danger** and should be stored at **ambient temperature** in a cool, dry place, away from incompatible substances.
Does Molekula offer 4-Hydroxypyridine in bulk quantities?
Yes, Molekula supplies 4-Hydroxypyridine in bulk, with quantities tailored to your requirements—please contact us for pricing and availability.
What documentation comes with an order of 4-Hydroxypyridine?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and a **Packing List** with batch-specific details.
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.