5,6-Dimethyl-2-thiouracil
Also known as: 2-Mercapto-5,6-dimethylpyrimidin-4(3H)-one, 2-Mercapto-5,6-dimethylpyrimidine-4-ol, 5,6-Dimethyl-4-hydroxy-2-thiopyrimidine, 5,6-Dimethyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one, 5,6-dimethyl-2-sulfanylidene-1H-pyrimidin-4-one, 5,6-dimethyl-2-thio-uracil, 5,6-dimethyl-2-thioxo-1H-pyrimidin-4-one
5,6-Dimethyl-2-thiouracil (CAS 28456-54-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H8N2OS and a molecular weight of 156.20600 g/mol. Key properties include a melting point of 284-288ºC(lit.), a boiling point of 347.3ºC at 760mmHg, a density of 1.29g/cm3 and a flash point of 163.9ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 28456-54-4
- Jingsj CID
- J-1992664-8
- Molecular Formula
- C6H8N2OS
- Molecular Weight
- 156.20600 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 284-288ºC(lit.) |
|---|---|
| Boiling Point | 347.3ºC at 760mmHg |
| Density | 1.29g/cm3 |
| Flash Point | 163.9ºC |
| Exact Mass | 156.03600 |
| PSA | 84.81000 |
| LogP | 1.08770 |
| Vapor Pressure | 2.7E-05mmHg at 25°C |
| Refractive Index | 1.61 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933599090 |
|---|---|
| Summary | 2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 5,6-Dimethyl-2-thiouracil?
The CAS number of 5,6-Dimethyl-2-thiouracil is 28456-54-4.
What are the molecular formula and molecular weight of 5,6-Dimethyl-2-thiouracil?
5,6-Dimethyl-2-thiouracil has molecular formula C6H8N2OS and molecular weight 156.20600 g/mol.
Is 5,6-Dimethyl-2-thiouracil hazardous?
5,6-Dimethyl-2-thiouracil has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 5,6-Dimethyl-2-thiouracil?
For 5,6-Dimethyl-2-thiouracil, Upstream Products: Ethyl 2-methylacetoacetate, methyl 2-methylacetoacetate; Downstream Products: 4-Chloro-5,6-dimethylpyrimidine, 5,6-Dimethylpyrimidin-4(3H)-one, 5,6-dimethyluracil.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5,6-Dimethyl-2-thiouracil (CAS 28456-54-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1992664-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.