3-Hydroxymethyl-5-methylisoxazole CAS 35166-33-7
| CAS No. | 35166-33-7 |
| Molecular Formula | C5H7NO2 |
| Molecular Weight | 113.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Hydroxymethyl-5-methylisoxazole (CAS 35166-33-7), molecular formula C5H7NO2 and molecular weight 113.11 g/mol, is a CATO reference standard with documented purity and traceability.
3-Hydroxymethyl-5-methylisoxazole (C5H7NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), 3-Hydroxymethyl-5-methylisoxazole 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 | C5H7NO2 |
| Molecular Weight | 113.11 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 1 |
Related Hydroxymethyl Standards
- 3-(hydroxymethyl)oxetane-3-carbonitrile (CAS 1374657-44-9)
- 3-Hydroxymethyl-2-methyl-1,2,4-triazole (CAS 91616-36-3)
- 4-(Hydroxymethyl)-1-methylpyrazole (CAS 112029-98-8)
- 3-(Hydroxymethyl)azetidine-3-carbonitrile (CAS 1554429-44-5)
- 2-(Hydroxymethyl)cyclopent-2-en-1-one (CAS 68882-71-3)
- 3-(Hydroxymethyl)-2-methylfuran (CAS 5554-99-4)
- 5-(Hydroxymethyl)-1-methylpyrazole (CAS 84547-61-5)
- 2-(hydroxymethyl)-2H-furan-5-one (CAS 10374-60-4)
Recommended Standards
- 3-Cyano-2-methylpropanoic acid (CAS 39621-27-7)
- 3-isocyanatooxolane (CAS 850876-21-0)
- 3,4-Dimethyl-5-isoxazolol (CAS 29279-99-0)
- 3-methoxy-1,2-dihydropyrrol-5-one (CAS 69778-83-2)
- (3-(1,3-Dioxolan-2-yl)phenyl)(3-methoxyphenyl)methanone (CAS 898778-89-7)
- (R)-1-(3-Chloroisothiazol-4-yl)ethan-1-ol (CAS 2643340-79-6)
- ((2S,5R)-5-(6-Amino-2-(trifluoromethyl)-9H-purin-9-yl)tetrahydrofuran-2-yl)methanol (CAS 122970-33-6)
- n-(2-Chlorobenzyl)-1-methoxypropan-2-amine (CAS 1019578-17-6)
- N-(2-(2-Fluorophenoxy)-4,6-dimethylpyrimidin-5-yl)acetamide (CAS 1798459-31-0)
- (S)-N-(1,4-Dihydroxybutan-2-yl)benzamide (CAS 296766-73-9)
- 2-((4,6-Bis(phenylamino)-1,3,5-triazin-2-yl)amino)acetic acid (CAS 62751-85-3)
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- Ethyl 2-(2-((3-cyano-4-phenyl-6-(p-tolyl)pyridin-2-yl)thio)acetamido)-4,5-dimethylthiophene-3-carboxylate (CAS 332053-33-5)
- Cholecystokinin Octapeptide (1-5) (desulfated) (CAS 121880-96-4)
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