4-Hydrazinyl-4-oxobutanoic acid CAS 4604-20-0
| CAS No. | 4604-20-0 |
| Molecular Formula | C23H28N2OS |
| Molecular Weight | N/A |
| 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.
4-Hydrazinyl-4-oxobutanoic acid (CAS 4604-20-0), molecular formula C23H28N2OSCH4O3S and molecular weight 476.65 g/mol, is a CATO reference standard with documented purity and traceability.
4-Hydrazinyl-4-oxobutanoic acid (C23H28N2OSCH4O3S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C23H28N2OS CH4O3S |
| Molecular Weight | 476.65 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
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Recommended Standards
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- 5466-54-6 Disodium dimercaptomaleonitrile sodium (Z)-1,2-dicyanoethene-1,2-bis(thiolate) (CAS 5466-54-6)
- 5-(1-Chloroethyl)-3-(4h-1,2,4-triazol-3-yl)-1,2,4-oxadiazole (CAS 1038358-79-0)
- N'-(2-Methoxybenzylidene)-3-(3-nitrophenyl)-1H-pyrazole-5-carbohydrazide (CAS 302918-47-4)
- 3-(1H-Benzo[d]imidazol-1-yl)butanoic acid hydrochloride (CAS 35321-25-6)
- 3-Amino-3,5,5-trimethyldihydrofuran-2(3H)-one hydrochloride (CAS 108682-65-1)
- Endo-Gly29-Tirzepatide (CAS CATO-CPTD788685)
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