Molekula
Allopurinol
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
Allopurinol is a xanthine oxidase inhibitor used to treat gout and hyperuricemia. It reduces uric acid production in the body. Available as a white to off-white powder, it has a CAS number of 315-30-0, molecular formula C5H4N4O, and molecular weight of 136.11 g/mol. Store at 2 to 8 °C. Hazard classification includes Signal Word: Danger. Molekula supplies Allopurinol 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 — £26.40 per pack ex VAT · £31.68 inc. VAT
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100 g — £55.90 per pack ex VAT · £67.08 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 Crystalline Powder |
| Assay/Purity | 98% - 102% |
| Grade | USP33 Grade |
| Impurity A | ≤0.2% |
| Impurity B | ≤0.2% |
| Impurity C | ≤0.2% |
| Impurity D | ≤0.2% |
| Loss on Drying | ≤ 0.5% |
| Identification (IR) | IR |
| Impurity F | ≤0.2% |
| Limit of hydrazine | ≤10ppm |
| Impurity E | ≤0.2% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Fluffy white to off-white powder |
| Odour | Slight |
| Melting Point | 350 °C |
| Water Solubility | 569 mg/L at 25 °C |
| pKa | pKa = 10.2 (at 25℃) |
| log P (octanol/water) | -0.55 |
Source: PubChem CID 135401907 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 12010591 |
| CAS Number | 315-30-0 |
| IUPAC Name | 1,5-dihydropyrazolo[5,4-d]pyrimidin-4-one |
| EC Number | 206-250-9 |
| Molecular Formula | C5H4N4O |
| Molecular Weight | 136.11 |
| Exact Mass | 136.0385 |
| SMILES | C1=NNC2=C1C(=O)NC=N2 |
| InChIKey | OFCNXPDARWKPPY-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H4N4O/c10-5-3-1-8-9-4(3)6-2-7-5/h1-2H,(H2,6,7,8,9,10) |
| PubChem CID | 135401907 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.59.9500 |
| Tariff Code | 2933599590 |
Safety & GHS
-
Toxic
GHS06
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H317 May cause an allergic skin reaction
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
- USH01 May form combustible dust concentrations in air
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, 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
- 1H-Pyrazolo[3,4-d]pyrimidin-4-ol
- Allopur
- Bloxanth
- Ketobun-A
- Suspendol
- Takanarumin
- Urbol
- Uriprim
- Xanturat
- Zyloric
Frequently asked questions
What is allopurinol used for?
Allopurinol is used to treat gout and certain types of kidney stones by reducing uric acid production.
What is the chemical formula and molecular weight of allopurinol?
The formula is C5H4N4O with a molecular weight of 136.11 g/mol.
How should allopurinol be stored?
Allopurinol should be stored at 2 to 8 °C and protected from light and moisture.
What grade of allopurinol does Molekula supply?
Molekula supplies allopurinol in research grade, suitable for laboratory use.
Can Molekula supply allopurinol in bulk quantities?
Yes, Molekula can supply allopurinol in bulk quantities—please contact us for pricing and availability.
What documentation comes with an order of allopurinol?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) upon request.
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.