Molekula
2-Thiouracil
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
2-Thiouracil is a heterocyclic organic compound used in pharmaceutical research and as an intermediate in the synthesis of nucleoside analogs. It also serves as a chemical intermediate in the manufacture of iothiouracil sodium and is used in veterinary medicines. It appears as a white to pale yellow crystalline powder. CAS: 141-90-2, Molecular Formula: C4H4N2OS, Molecular Weight: 128.15 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies 2-Thiouracil 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
In stock — same-day dispatch
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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100 g — £37.30 per pack ex VAT · £44.76 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 off-white powder |
| Heavy metals | ≤ 25ppm |
| Identification | Conforms to reference |
| Loss on Drying | ≤ 0.5% |
| Assay | ≥ 99.0% |
| Residue on Ignition | ≤ 0.5% |
| Any other individual impurity | ≤ 0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Odour | Odorless |
Source: PubChem CID 1269845 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 44036154 |
| CAS Number | 141-90-2 |
| IUPAC Name | 2-sulfanylidene-1H-pyrimidin-4-one |
| EC Number | 205-508-8 |
| Molecular Formula | C4H4N2OS |
| Molecular Weight | 128.15 |
| Exact Mass | 128.0044 |
| SMILES | C1=CNC(=S)NC1=O |
| InChIKey | ZEMGGZBWXRYJHK-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H4N2OS/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8) |
| PubChem CID | 1269845 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29335995 |
| Tariff Code | 2933599590 |
Safety & GHS
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Serious Health Hazard
GHS08
Hazard statements
- H303 May be harmful if swallowed
- H351 Suspected of causing cancer
- H401 Toxic to aquatic life
Precautionary statements
- P201 Obtain special instructions before use
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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.
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
- 2-Mercapto-4-hydroxypyrimidine
- 2-Mercapto-4-pyrimidone
- 2-thioxo-2,3-dihydropyrimidin-4(1H)-one
- 4(1H)-Pyrimidinone, 2,3-dihydro-2-thioxo-
- 6-Thiouracil
- Antagothyroid
- Antagothyroil
- Deracil
- Nobilen
- Thiouracil
Frequently asked questions
What is 2-Thiouracil used for?
2-Thiouracil is primarily used as a chemical intermediate in the synthesis of pharmaceuticals and agrochemicals, and as a reagent in organic synthesis.
What is the chemical formula and molecular weight of 2-Thiouracil?
The chemical formula is C4H4N2OS and the molecular weight is 128.15 g/mol.
How should 2-Thiouracil be stored?
2-Thiouracil should be stored at ambient temperature, protected from moisture and light.
What grade of 2-Thiouracil is available?
Molekula supplies 2-Thiouracil in research grade.
Can Molekula supply 2-Thiouracil in bulk?
Yes, Molekula can supply 2-Thiouracil in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a 2-Thiouracil order?
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.