1H-Thieno[3,4-d]pyrimidine-2,4-dione CAS 6251-30-5
| CAS No. | 6251-30-5 |
| Molecular Formula | C6H4N2O2S |
| Molecular Weight | 168.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1H-Thieno[3,4-d]pyrimidine-2,4-dione (CAS 6251-30-5), molecular formula C6H4N2O2S and molecular weight 168.17 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 1H-Thieno[3,4-d]pyrimidine-2,4-dione is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 168.17 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), 1H-Thieno[3,4-d]pyrimidine-2,4-dione meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H4N2O2S |
| Molecular Weight | 168.17 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related H Standards
- 1H-thieno[3,2-c]pyrazole-5-carboxylic acid (CAS 1313726-01-0)
- Thieno[3,2-b]furan-5-carboxylic acid (CAS 1334148-11-6)
- Thieno[2,3-b]pyrazine-2,3(1H,4H)-dione (CAS 149587-32-6)
- Thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione (CAS 16233-51-5)
- 3H-Thieno[2,3-d]imidazole-5-carboxylic acid (CAS 193066-59-0)
- Thieno[2,3-b]furan-5-carboxylic acid (CAS 934246-40-9)
- Thieno[2,3-d]pyrimidine-4-thiol (CAS 14080-55-8)
- thieno[3,2-d]pyrimidine-4-thiol (CAS 16229-24-6)
Recommended Standards
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- 2-(2-Nitrophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one (CAS 71977-22-5)
- 4-Amino-2-bromobenzonitrile (CAS 53312-82-6)
- 3-Bromo-4-methylbiphenyl (CAS 855255-82-2)
- (1S,4s)-1-(bromomethyl)-4-methylcyclohexane (CAS 78507-33-2)
- (R)-6-Bromo-3-methyl-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one (CAS 2379795-13-6)
- [Ac-Gly1]Terlipressin (CAS CATO-C4X-219316)
- 4-((Methylamino)methyl)isothiazol-3(2H)-one (CAS 111781-99-8)
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