Dimethyl 2,5-dihydrothiophene-3,4-dicarboxylate CAS 20946-32-1
| CAS No. | 20946-32-1 |
| Molecular Formula | C8H10O4S |
| Molecular Weight | 202.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Dimethyl 2,5-dihydrothiophene-3,4-dicarboxylate (CAS 20946-32-1), a certified reference material (molecular formula C8H10O4S, MW 202.23 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Dimethyl 2,5-dihydrothiophene-3,4-dicarboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 202.23 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Dimethyl 2,5-dihydrothiophene-3,4-dicarboxylate 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 | C8H10O4S |
| Molecular Weight | 202.23 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Sulfur Atoms | 1 |
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Recommended Standards
- Dihydro-1-(2-methoxyethyl)-2-thioxo-4,6(1H,5H)-pyrimidinedione (CAS 560995-25-7)
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- Benzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one (CAS 36822-08-9)
- Ethyl 3-amino-5-(methylthio)-4H-1,2,4-triazole-4-carboxylate (CAS 79742-02-2)
- 5-Amino-3-methyl-1-phenylpyrazole-4-thiol (CAS 96497-49-3)
- 5-(Pyridin-3-yl)pyrimidine (CAS 73082-69-6)
- 2-Octene (CAS 111-67-1)
- 2-Chloro-1,2,3,4-tetrahydronaphthalen-1-one (CAS 17215-80-4)
- Pyrrolidine, 2-methyl-5-phenyl- (CAS 1357391-22-0)
- (4-Cyclopentylthiophen-2-yl)boronic acid (CAS 2225179-88-2)
- N-benzyl-2-bromo-N-methylprop-2-en-1-amine (CAS 111831-90-4)
- Ethyl 2-(4-ethynylphenyl)acetate (CAS 87356-23-8)
- 7-ethyl-3-(1,2,3,6-tetrahydropyridin-4-yl)-1H-indole (CAS 460354-13-6)
- Semaglutide impurity 211 (CAS CATO-C4X-2226211)
Why CATO?
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