Dimethyl 4-Hydroxyphthalate CAS 22479-95-4
| CAS No. | 22479-95-4 |
| Molecular Formula | C10H10O5 |
| Molecular Weight | 210.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Dimethyl 4-Hydroxyphthalate (CAS 22479-95-4), molecular formula C10H10O5 and molecular weight 210.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Dimethyl 4-Hydroxyphthalate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 210.18 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).
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.
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 | C10H10O5 |
| Molecular Weight | 210.18 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 methanol, ethanol, 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.) | 1963 |
Related Dimethyl Standards
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Recommended Standards
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- tert-Butyl 6-(aminomethyl)-3-azabicyclo[4.1.0]heptane-3-carboxylate (CAS 1334495-27-0)
- 2-[4-({[(9h-fluoren-9-yl)methoxy]carbonyl}amino)oxan-4-yl]acetic acid (CAS 946716-25-2)
- 2-(4-(Difluoromethyl)-6-fluoro-3-methylpyridin-2-yl)acetic acid (CAS 1806931-52-1)
- 3,3-Dimethyl-1-(3-(1-(4-(trifluoromethyl)phenyl)-1H-1,2,3-triazole-4-carbonyl)phenyl)azetidin-2-one (CAS 865659-07-0)
- 3-(3-Fluorobenzenesulfonyl)propan-1-ol (CAS 1020734-55-7)
- 6-(1-(2-Fluoropyridin-3-yl)-5-methyl-1H-1,2,3-triazol-4-yl)quinoline (CAS 1025802-62-3)
- Semaglutide impurity 272 (CAS CATO-C4X-2226272)
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