3-Methyl-5,6-dihydrothieno[2,3-d]pyrimidine-2,4(1H,3H)-dione CAS 21004-30-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 21004-30-8 |
| Molecular Formula | C7H8N2O2S |
| Molecular Weight | 184.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-Methyl-5,6-dihydrothieno[2,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 21004-30-8), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C7H8N2O2S. Molecular weight: 184.22 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C7H8N2O2S |
| Molecular Weight | 184.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 1-(2,3-Dihydrothieno[3,4-b][1,4]dioxin-5-yl)ethan-1-one (CAS 250726-91-1)
- 1-(2,3-Dihydrothieno[3,4-b][1,4]dioxin-5-yl)-N-methylmethanamine (CAS 859851-03-9)
- (2,3-Dihydrothieno[3,4-b][1,4]dioxin-5-yl)boronic acid (CAS 1116093-39-0)
- 2,3-Dihydrothieno[3,4-b][1,4]dioxine-2-carboxylic acid (CAS 955373-67-8)
- 4,6-Dihydrothieno[3,4-b]thiophene-2-carboxylic acid (CAS 7712-05-2)
- 4-Methyl-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-carbaldehyde (CAS 1254344-25-6)
- 7-Methyl-4,7-dihydrothieno[2,3-c]pyridine-6(5H)-carbaldehyde (CAS 678185-07-4)
- 1,3-Dihydrothieno[3,4-b]quinoxaline (CAS 3138-80-5)
Recommended Standards
- 3-Methyl-5,6-dihydroimidazo[2,1-b]thiazole-2-carboxylic acid (CAS 762178-13-2)
- 3-Oxo-N-(thiazol-2-yl)butanamide (CAS 705-87-3)
- 3-Acetyl-2-(methylthio)pyrimidin-4(3H)-one (CAS 283168-85-4)
- 1-(4-methylbenzenesulfonyl)azetidin-3-ol (CAS 154010-96-5)
- 1,3-Bis(2,2-dimethyl-1,3-dioxolan-4-ylmethyl)carbodiimide (CAS 159390-26-8)
- n-(2-Chloropyridin-3-yl)-2-hydroxyacetamide (CAS 879146-79-9)
- 3-(tert-Butyl)-2-hydroxy-5-nitrobenzaldehyde (CAS 72607-35-3)
- Arsenic(III) oxide (CAS 1327-53-3)
- (1R,2R)-2-(Benzyloxy)cyclohexanamine (CAS 216394-06-8)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com