3-Phosphonobutanoic acid CAS 4422-66-6
| CAS No. | 4422-66-6 |
| Molecular Formula | C4H9O5P |
| Molecular Weight | 168.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-Phosphonobutanoic acid (CAS 4422-66-6), molecular formula C4H9O5P and molecular weight 168.09 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Phosphonobutanoic acid (C4H9O5P) is characterized by a carbohydrate-derived structure, a phosphate ester group. 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.
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 | C4H9O5P |
| Molecular Weight | 168.09 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 |
Recommended Standards
- 3,5-Bis(difluoromethyl)-1H-pyrazole (CAS 77614-79-0)
- 4-Phosphonobutyric acid (CAS 4378-43-2)
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- Butyric phosphoric anhydride (CAS 4378-06-7)
- 4-(1-amino-2-methylpropan-2-yl)oxan-4-ol (CAS 1538916-21-0)
- 1-(Cyclopentanecarbonyl)piperidine-3-sulfonamide (CAS 1308359-49-0)
- 2,4-Dibromothiazole-5-methanol (CAS 170232-68-5)
- 2-Acetylnicotinonitrile (CAS 1211523-06-6)
- N-(5-Amino-2-methoxyphenyl)-4-(isopentyloxy)-benzamide (CAS 1020055-71-3)
- 4-(Neopentyloxy)pyridin-3-amine (CAS 1447961-62-7)
- 2-(Allylthio)-3-ethylthieno[3,2-d]pyrimidin-4(3H)-one (CAS 338401-80-2)
- 4-Amino-3-(2-fluorophenyl)isothiazole-5-carboxylic acid (CAS 1487221-74-8)
- Ethyl 2-((((2R,3S,5R)-5-(5-((E)-2-bromovinyl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3-hydroxytetrahydrofuran-2-yl)methoxy)(hydroxy)phosphoryl)acetate (CAS 115365-28-1)
- Semaglutide impurity 92 (CAS CATO-C4X-222692)
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