1-(3,6-Dihydroxy-2-methoxyphenyl)ethanone CAS 33539-20-7
| CAS No. | 33539-20-7 |
| Molecular Formula | C9H10O4 |
| Molecular Weight | 182.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(3,6-Dihydroxy-2-methoxyphenyl)ethanone (CAS 33539-20-7), molecular formula C9H10O4 and molecular weight 182.17 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, 1-(3,6-Dihydroxy-2-methoxyphenyl)ethanone is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 182.17 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 | C9H10O4 |
| Molecular Weight | 182.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
Related Dihydroxy Standards
- 2,2-Dihydroxy-1-(3-methoxyphenyl)ethanone (CAS 1201806-19-0)
- 2,2-Dihydroxy-1-(4-methoxyphenyl)ethan-1-one (CAS 16208-17-6)
- Methyl 2,6-dihydroxy-4-methylbenzoate (CAS 16846-10-9)
- 1-(2,4-Dihydroxy-3-methoxyphenyl)ethanone (CAS 62615-26-3)
- 1-(2,5-Dihydroxy-4-methoxyphenyl)ethanone (CAS 22089-12-9)
- 1-(3,4-Dihydroxy-2-methoxyphenyl)ethanone (CAS 27829-93-2)
- 1-(3,4-Dihydroxy-5-methoxyphenyl)ethan-1-one (CAS 3934-89-2)
- 2,3-Dihydroxy-3-phenylpropanoic acid (CAS 5695-95-4)
Recommended Standards
- 1-(3,5-Difluorophenyl)but-3-en-2-one (CAS 889955-36-6)
- 1-(Difluoromethyl)-2-methyl-1h-1,3-benzodiazole (CAS 84941-16-2)
- 1,1'-(1,2-Phenylene)bis(prop-2-yn-1-one) (CAS 54160-73-5)
- 1,1-dimethyl 2-ethynylcyclopropane-1,1-dicarboxylate (CAS 813458-58-1)
- 1,4-Dihydroxy-2-(hydroxymethyl)anthracene-9,10-dione (CAS 22296-59-9)
- 2-Phenyl-4-(((1-(m-tolyl)-1H-tetrazol-5-yl)thio)methyl)thiazole (CAS 782457-22-1)
- 2-Propenoic acid, 3-[3,4-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]phenyl]-, (2E) (CAS 203118-32-5)
- 3-Amino-2-(naphthalen-2-yl)propanoic acid (CAS 1017788-20-3)
- 6,7-Dimethoxy-3,4-dihydronaphthalen-1(2H)-one (CAS 13575-75-2)
- 5-Methyloctan-2-one (CAS 58654-67-4)
- 2-((2,3-Difluorobenzyl)oxy)cyclohexanamine (CAS 1956379-34-2)
- 4-Fluoro-2-methyl-1H-pyrrolo[3,2-c]pyridine (CAS 1190314-71-6)
- (R)-8-(trifluoromethoxy)chroman-4-amine (CAS 1144502-12-4)
- Semaglutide impurity 271 (CAS CATO-C4X-2226271)
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