Fosfomycin Impurity 28 CAS CATO-C4X-131628
| CAS No. | CATO-C4X-131628 |
| Molecular Formula | C16H30NaO14P |
| Molecular Weight | 500.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Fosfomycin Impurity 28 is closely related to a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Fosfomycin Impurity 28 (CAS CATO-C4X-131628), a pharmacopoeial impurity reference standard (molecular formula C16H30NaO14P, MW 500.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Fosfomycin Impurity 28 (C16H30NaO14P) contains a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 500.36 g/mol, it falls into the moderately-high-molecular-weight range.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C16H30NaO14P |
| Molecular Weight | 500.36 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
Related Fosfomycin Standards
- Fosfomycin Impurity 25 (CAS CATO-C4X-131625)
- Fosfomycin Impurity 70 (CAS CATO-C4X-131670)
- Fosfomycin Impurity 26 (CAS CATO-C4X-131626)
- Fosfomycin Impurity 27 (CAS CATO-C4X-131627)
- Fosfomycin Trometamol EP Impurity F (CAS CATO-C4X-131630)
- Fosfomycin Trometamol EP Impurity D (CAS 1262243-12-8)
- Fosfomycin Impurity 58 (CAS CATO-C4X-131658)
- Fosfomycin Impurity 24 (CAS 1416734-33-2)
Recommended Standards
- N-(4-chloro-3-nitrophenyl)-2-((5-(4-chlorophenyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 443739-90-0)
- Ethyl 6-methyl-7-oxo-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-6,7-dihydro-1H-pyrrolo[2,3-c]pyridine-2-carboxylate (CAS 1628864-26-5)
- Lifitegrast Impurity 68 (CAS CATO-C4X-240968)
- 5-(4-Bromophenyl)-4-(4-ethoxybenzoyl)-3-hydroxy-1-(5-methyl-1,3,4-thiadiazol-2-yl)-1H-pyrrol-2(5H)-one (CAS 371220-53-0)
- Abiraterone Impurity 43 (CAS CATO-C4X-107043)
- Aripiprazole Impurity 28 (CAS 1359829-23-4)
- Canagliflozin Impurity 68 (CAS CATO-C4X-112368)
- S-Venlafaxine-di-p-toluoyl-L-tartrate Salt (CAS 272788-02-0)
- 4-Hydroxyfuran-2(3H)-one (CAS 436162-45-7)
- 2-Ethylbenzene-1-sulfonyl chloride (CAS 34586-43-1)
- 2-[(4-methylphenyl)thio]ethanamine hydrochloride (CAS 24194-10-3)
- Linagliptin Impurity 159 (CAS CATO-C4X-1101159)
- Dotinurad impurity 105 (CAS CATO-C4X-2494105)
- Hexapeptide-11 (CAS 161258-30-6)
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