3,5-Dimethyl-1,2-cyclopentadione CAS 13494-07-0
| CAS No. | 13494-07-0 |
| Molecular Formula | C7H10O2 |
| Molecular Weight | 126.15 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.
3,5-Dimethyl-1,2-cyclopentadione (CAS 13494-07-0), molecular formula C7H10O2 and molecular weight 126.15 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 3,5-Dimethyl-1,2-cyclopentadione is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 126.15 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).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H10O2 |
| Molecular Weight | 126.15 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1960 |
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Recommended Standards
- 3-Ethyl-2-hydroxy-2-cyclopenten-1-one (CAS 21835-01-8)
- 3,4-Dimethyl-1,2-cyclopentanedione (CAS 13494-06-9)
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- Allyl Methacrylate (stabilized with MEHQ) (CAS 96-05-9)
- 5-Chloro-2-(chloromethyl)-3-methylbenzofuran (CAS 63639-68-9)
- (S)-2-Amino-N-(2-fluoro-4-methylphenyl)-3-methylbutanamide (CAS 1292593-28-2)
- 2-[(5-chloro-7-iodoquinolin-8-yl)oxy]propanoic acid hydrochloride (CAS 1181458-09-2)
- 3,4-Dichloro-5-methylaniline (CAS 51719-45-0)
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- 3-((1-(Bromomethyl)cyclopropyl)methoxy)tetrahydrofuran (CAS 1482876-63-0)
- (4-Ethoxyphenyl)hydrazine (CAS 39943-51-6)
- 1-(2-phenyl-1,3-oxazol-5-yl)ethan-1-one (CAS 191925-66-3)
- Tetrahydro-2-(tetrahydro-3-furanyl)-2H-pyran-4-ol (CAS 1341662-22-3)
- Tirzepatide Impurity 18 (CAS CATO-C4X-324018)
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