(5S,6R)-6-Ethyl-5-methyldihydro-2H-pyran-2,4(3H)-dione CAS 202072-86-4
| CAS No. | 202072-86-4 |
| Molecular Formula | C8H12O3 |
| Molecular Weight | 156.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of (5S,6R)-6-Ethyl-5-methyldihydro-2H-pyran-2,4(3H)-dione is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
(5S,6R)-6-Ethyl-5-methyldihydro-2H-pyran-2,4(3H)-dione (CAS 202072-86-4), molecular formula C8H12O3 and molecular weight 156.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, (5S,6R)-6-Ethyl-5-methyldihydro-2H-pyran-2,4(3H)-dione is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 156.18 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), (5S,6R)-6-Ethyl-5-methyldihydro-2H-pyran-2,4(3H)-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 | C8H12O3 |
| Molecular Weight | 156.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2014 |
Recommended Standards
- (5-Isobutyl-[1,2,4]oxadiazol-3-yl)-methanol (CAS 915920-18-2)
- (6R,7aS)-6-hydroxy-2-methyl-hexahydro-1H-pyrrolo[1,2-c]imidazolidin-3-one (CAS 1989638-21-2)
- (5-(Ethoxymethyl)isoxazol-3-yl)methanamine (CAS 893749-25-2)
- (9AR)-Hexahydropyrazino-[2,1-c][1,4]oxazin-4(3H)-one (CAS 930783-26-9)
- 5-[1-(3,4-Dimethylbenzoyl)pyrrolidin-2-yl]-3-(4-methoxyphenyl)-1,2,4-oxadiazole (CAS 1798454-21-3)
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- 8-Ethyl-4-(4-methylbenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid (CAS 1326811-41-9)
- 4-Chloro-5-(4-methoxyphenyl)thieno[2,3-d]pyrimidine (CAS 312584-53-5)
- 1-Chloro-2-cyclopropoxy-4-ethylbenzene (CAS 1243482-60-1)
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- Peptide Impurity 09 X TFA Salt (CAS CATO-CPTD788809)
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