Chlorpyrifos-Oxon CAS 5598-15-2
| CAS No. | 5598-15-2 |
| Molecular Formula | C9H11Cl3NO4P |
| Molecular Weight | 334.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Chlorpyrifos-Oxon (CAS 5598-15-2) is a high-purity analytical reference standard with the molecular formula C9H11Cl3NO4P and a molecular weight of 334.52 g/mol.
Structurally, Chlorpyrifos-Oxon (C9H11Cl3NO4P) contains an amide group, a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.5, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 334.52 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C9H11Cl3NO4P |
| Molecular Weight | 334.52 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chlorpyrifos Standards
- Chlorpyrifos-oxon-d10 (CAS 1794779-85-3)
- Chlorpyrifos-Methyl (CAS 5598-13-0)
- Chlorpyrifos (CAS 2921-88-2)
- Chlorpyrifos (diethyl-D10) (CAS 285138-81-0)
- Chlorpyrifos-Methyl-Oxon (CAS 5598-52-7)
- Chlorpyrifos Impurity 6 (CAS 4486-44-6)
- Chlorpyrifos Impurity 1 (CAS 167100-86-9)
- Chlorpyrifos quality control sample from acetone (CAS CATO-CQCM102215)
Recommended Standards
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- 2-Amino-6-(tert-butyl)-N-cyclohexyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxamide (CAS 438234-59-4)
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- Semaglutide Impurity 128 (CAS 2490269-78-6)
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