3-Methyl-5-((methylthio)methyl)isoxazole CAS 62705-67-3
| CAS No. | 62705-67-3 |
| Molecular Formula | C6H9NOS |
| Molecular Weight | 143.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methyl-5-((methylthio)methyl)isoxazole (CAS 62705-67-3), molecular formula C6H9NOS and molecular weight 143.21 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Methyl-5-((methylthio)methyl)isoxazole (C6H9NOS) is characterized by an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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-Methyl-5-((methylthio)methyl)isoxazole 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 | C6H9NOS |
| Molecular Weight | 143.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 1-Methyl-3-(Methylthio)-1H-Pyrazol-5-Amine (CAS 1537025-01-6)
- 1-Methyl-5-(Methylthio)-1H-Pyrazol-3-Amine (CAS 158355-45-4)
- 5-(Methylthio)-1,2,4-triazin-3(4H)-one (CAS 57360-30-2)
- 2-(Methylthio)-5,6-dihydropyrimidin-4(1H)-one (CAS 100185-53-3)
- (5-(Methylthio)furan-2-yl)methanol (CAS 171738-68-4)
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- 5-Methyl-2-(methylthio)-1H-imidazol-4(5H)-one (CAS 95907-23-6)
- 1-Methyl-3-(methylthio)-1H-1,2,4-triazol-5-amine (CAS 51108-35-1)
Recommended Standards
- 3,5-Dimethyl-4-isothiazolemethanol (CAS 53064-43-0)
- 3-propyl-1,2,4-thiadiazol-5-amine (CAS 32039-20-6)
- 3-(Propan-2-yl)-1,2,4-thiadiazol-5-amine (CAS 32039-21-7)
- 4-(Methoxymethyl)-2-methylthiazole (CAS 478031-96-8)
- Ethyl 3-aminobicyclo[2.2.1]Hept-5-ene-2-carboxylate hydrochloride (CAS 95630-74-3)
- Sodium 2-phenylquinazolin-4-olate (CAS 454422-23-2)
- 3-(1-(Methoxymethoxy)-1H-indazol-5-yl)propanenitrile (CAS 1417163-05-3)
- Diethylene Glycol Cyclic Phthalate (CAS 13988-26-6)
- (4aS,9aR)-4,4a,9,9a-Tetrahydroindeno[2,1-b][1,4]oxazin-3(2H)-one (CAS 913718-34-0)
- S-Indacaterol (CAS 1235445-80-3)
- Benzoylmesaconine-7-Palmitate (CAS 158584-86-2)
- Latamoxef Impurity 36 (CAS CATO-C4X-179836)
- 1-(1H-Indazol-5-yl)ethanamine (CAS 1001906-62-2)
- Biotinyl-Neuropeptide W-23 (human) (CAS 1815618-09-7)
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