2-Isopropoxyethyl 4-methylbenzenesulfonate CAS 51218-98-5
| CAS No. | 51218-98-5 |
| Molecular Formula | C12H18O4S |
| Molecular Weight | 258.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Isopropoxyethyl 4-methylbenzenesulfonate (CAS 51218-98-5) is a high-purity analytical reference standard with the molecular formula C12H18O4S and a molecular weight of 258.33 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Isopropoxyethyl 4-methylbenzenesulfonate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 258.33 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 | C12H18O4S |
| Molecular Weight | 258.33 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Sulfur Atoms | 1 |
Related Isopropoxyethyl Standards
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- 1-(2-Isopropoxyethyl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (CAS 1339890-98-0)
- 1-((2-Isopropoxyethyl)sulfonyl)piperazine (CAS 1375472-27-7)
- 2-Isopropoxyethyl trifluoromethanesulfonate (CAS 1698852-59-3)
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Recommended Standards
- (4-(Tert-butyl)phenyl)(4-fluorophenyl)methanol (CAS 596812-34-9)
- 2-Propenoic acid, 2-methyl-, 1,1'-(thiodi-2,1-ethanediyl) ester, homopolymer (CAS 36787-52-7)
- (4-(Tert-butyl)phenyl)(3-fluorophenyl)methanol (CAS 844683-59-6)
- 3-Ethoxypropyl 4-methylbenzenesulfonate (CAS 91766-05-1)
- 2-Hydroxy-N-(3-(pyrrolidin-1-yl)propyl)benzamide (CAS 1209220-87-0)
- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-cyanopropanoic acid (CAS 1822420-14-3)
- 3-(Benzyloxy)-2-methyl-6-nitropyridine (CAS 2044705-03-3)
- (5-(4-Iodophenyl)isoxazol-3-yl)methanol (CAS 1695039-91-8)
- 2,6-Dichloro-4-methyl-benzoic acid (CAS 99520-05-5)
- Methyl 4-amino-1-(cyclobutylmethyl)-1h-pyrrole-2-carboxylate (CAS 1467871-04-0)
- (3-Methyl-5-(thiazol-4-yl)phenyl)boronic acid (CAS 2225173-27-1)
- 2-[2-(2-bromophenyl)ethylsulfanyl]acetyl chloride (CAS 2737317-24-5)
- 2-(2-Hydroxy-1-phenylethyl)isoindolin-1-one (CAS 199868-84-3)
- D-[γ-Glu](Side Chain)-Semaglutide (CAS CATO-C4X-2226254)
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