Dimethyl 2,6-dimethylterephthalate CAS 18958-18-4
| CAS No. | 18958-18-4 |
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Dimethyl 2,6-dimethylterephthalate 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.
Dimethyl 2,6-dimethylterephthalate (CAS 18958-18-4), molecular formula C12H14O4 and molecular weight 222.24 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Dimethyl 2,6-dimethylterephthalate (C12H14O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 222.24 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1962 |
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Recommended Standards
- (R)-3,8-Dihydroxy-6-(hydroxymethyl)-7-methyl-3,4-dihydronaphthalen-1(2H)-one (CAS 1883551-65-2)
- (S)-2-methyl-1-(6-nitropyridin-3-yl)piperazine (CAS 1895867-66-9)
- 2-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)butanoic acid (CAS 18775-55-8)
- 2-(3-(Benzyloxy)oxetan-3-yl)acetic acid (CAS 1897551-06-2)
- (3S)-1-acetylpiperidine-3-carboxylic acid (CAS 111479-21-1)
- (5-(Pyrrolidin-1-ylsulfonyl)thiophen-3-yl)methanol (CAS 1477717-13-7)
- 6-Chloro-1-(6-chloropyridin-3-yl)hexan-1-one (CAS 914203-40-0)
- ((2R,3S,4R,5R)-5-(6-Amino-8-bromo-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate (CAS 23567-96-6)
- 5-Bromo-3-fluoro-1-methylpyridin-2(1H)-one (CAS 1352152-46-5)
- Terlipressin Acetate Salt (CAS 14636-12-5（free base）)
- Methyl 2-amino-4-p-tolylpyrimidine-5-carboxylate (CAS 1133115-58-8)
- 3-[2-(4-methoxypyrrolidin-2-yl)-1H-imidazol-4-yl]pyridine trihydrochloride (CAS 1423029-03-1)
- N-[2-Nitro-2-(phenylsulfonyl)vinyl]-4-phenoxyaniline (CAS 321434-01-9)
- Semaglutide impurity 55 (CAS CATO-C4X-222655)
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