Molekula
Thymine (5-Methyluracil)
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
Thymine (5-Methyluracil) is a pyrimidine nucleobase essential in DNA synthesis, widely used in molecular biology, pharmaceuticals, and biochemistry research. It serves as a building block for nucleotides and is used as a model compound in studies of UV-induced DNA photodamage, such as thymine dimer formation. Catalogue details: CAS 65-71-4, molecular formula C5H6N2O2, molecular weight 126.11 g/mol. Store at ambient conditions. Signal word: Warning. Molekula supplies Thymine 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
Specifications available on request — see Documents below or contact our sales team.
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 316 °C |
| Vapour Pressure | 0.00000133 mmHg |
Source: PubChem CID 1135 (DrugBank, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 31681796 |
| CAS Number | 65-71-4 |
| IUPAC Name | 5-methyl-1H-pyrimidine-2,4-dione |
| EC Number | 200-616-1 |
| Molecular Formula | C5H6N2O2 |
| Molecular Weight | 126.11 |
| Exact Mass | 126.0429 |
| SMILES | CC1=CNC(=O)NC1=O |
| InChIKey | RWQNBRDOKXIBIV-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H6N2O2/c1-3-2-6-5(9)7-4(3)8/h2H,1H3,(H2,6,7,8,9) |
| PubChem CID | 1135 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29335995 |
| Tariff Code | 2933599590 |
Safety & GHS
Hazard statements
- H303 May be harmful if swallowed
Precautionary statements
- 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
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.
Synonyms
- 2,4-Dihydroxy-5-methylpyrimidine
- 2,4(1H,3H)-Pyrimidinedione, 5-methyl-
- 5-Methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione
- 5-methyl-1H-pyrimidine-2,4-dione
- 5-methyl-2,4(1H,3H)-pyrimidinedione
- 5-methyluracil
- Thymin
- Thymin (purine base)
- thymine
- Thymine anhydrate
Frequently asked questions
What is thymine (5-methyluracil) commonly used for?
Thymine is primarily used as a nucleobase in DNA, in biochemical research, and as a building block for synthesizing nucleotides and oligonucleotides.
What is the chemical formula and molecular weight of thymine?
The chemical formula is C₅H₆N₂O₂, and the molecular weight is 126.11 g/mol.
How should thymine be stored?
Store thymine at ambient temperature in a dry, well-ventilated area, away from incompatible substances.
What purity grades of thymine does Molekula supply?
Molekula supplies thymine in analytical and biochemical research grades, typically ≥99% purity.
Can Molekula supply thymine in bulk quantities?
Yes, Molekula can supply thymine in bulk quantities—please contact us for custom packaging and pricing.
What documentation comes with a thymine 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.