Isopropyl Phosphonic Acid CAS 4721-37-3
| CAS No. | 4721-37-3 |
| Molecular Formula | C3H9O3P |
| Molecular Weight | 124.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Isopropyl Phosphonic Acid (CAS 4721-37-3) is a high-purity analytical reference standard with the molecular formula C3H9O3P and a molecular weight of 124.08 g/mol.
The molecular framework of Isopropyl Phosphonic Acid (C3H9O3P) is characterized by a phosphonate group, a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development.
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 | C3H9O3P |
| Molecular Weight | 124.08 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | -0.5 |
| CAS Registry Year (est.) | 1958 |
Related Isopropyl Standards
- 2-Isopropyl-5-methylfuran (CAS 10504-05-9)
- 1-Isopropyl-4-methyl-1H-pyrazole (CAS 130098-90-7)
- 132558-01-1 5-Isopropyl-3-methyl-1H-pyrazole hydrochloride MFCD26959398 (CAS 132558-01-1)
- 1-Isopropyl-4-methyl-1H-imidazole (CAS 1413917-62-0)
- 1-Isopropyl-3-methyl-1H-pyrazole (CAS 160729-58-8)
- 4-Isopropyl-1-methyl-1H-imidazole (CAS 196304-01-5)
- 5-Isopropyl-1-methyl-1H-imidazole (CAS 196304-02-6)
- 1-Isopropyl-5-methyl-1H-imidazole (CAS 89290-98-2)
Recommended Standards
- 4,4,4-trifluorobut-2-enal (CAS 406-88-2)
- CAS 202468-39-1 (CAS 202468-39-1)
- 1,1,1-Trifluorobut-3-yn-2-ol (CAS 1592412-29-7)
- 2767-80-8 Y6TG7WF7OQ Tris(hydroxymethyl)phosphine Methanol, phosphinidynetri- (7CI,8CI) Methanol, phosphinidynetris- Phosphinidynetrimethanol Methanol, 1,1',1''-phosphinidynetris- EINECS 220-445-6 Phosphinidynetrismethanol Trimethylolphosphine Tris(methanol)phosphine UNII-Y6TG7WF7OQ (CAS 2767-80-8)
- 1-(Difluoromethyl)-3-methyl-1H-pyrazol-4-amine (CAS 1201935-88-7)
- 1-(2-Fluorophenyl)-N-methyl-4-nitro-1H-pyrazol-5-amine (CAS 318238-11-8)
- 5-Ethoxy-2-phenyloxazole-4-carbonyl chloride (CAS 54644-14-3)
- 3-Benzenesulfonamido-3-[4-(propan-2-yl)phenyl]propanoic acid (CAS 861207-56-9)
- 4-Chloro-6-(difluoromethyl)-5-(trifluoromethyl)nicotinonitrile (CAS 1807025-77-9)
- N-(1-methoxypropan-2-yl)pentan-2-amine (CAS 1019629-55-0)
- (R)-Ethyl 3-phenoxybutanoate (CAS 1403475-07-9)
- 1-Benzyl-4-phenylamino-4-(hydroxymethyl)piperidine (CAS 61086-04-2)
- 2-(3,5-Dioxothiomorpholino)pent-4-ynoic acid (CAS 1566158-53-9)
- Semaglutide impurity 250 (CAS CATO-C4X-2226250)
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