4-Hydroxy-2-oxobutanoic acid CAS 22136-38-5
| CAS No. | 22136-38-5 |
| Molecular Formula | C4H6O4 |
| Molecular Weight | 118.09 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.
CATO supplies 4-Hydroxy-2-oxobutanoic acid (CAS 22136-38-5), a certified reference material (molecular formula C4H6O4, MW 118.09 g/mol) for analytical method development and quality control.
4-Hydroxy-2-oxobutanoic acid (C4H6O4) contains a carbohydrate-derived structure. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H6O4 |
| Molecular Weight | 118.09 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) | 2.0 |
| CAS Registry Year (est.) | 1963 |
Related Hydroxy Standards
- 4-Hydroxy-3-oxobutanoic acid (CAS 162369-88-2)
- 3-Hydroxy-2-oxobutanoic acid (CAS 1944-42-9)
- (R)-3-Hydroxy-2-oxobutanoic acid (CAS 68862-42-0)
- N’-hydroxy-2-methoxypropanimidamide (CAS 1251430-35-9)
- 3-Hydroxy-2-(hydroxymethyl)-2-methylpropanal (CAS 18516-18-2)
- (R)-2-Hydroxy-2-methylbutanoic acid (CAS 37505-02-5)
- (S)-2-Hydroxy-2-methylbutanoic acid (CAS 37505-07-0)
- 2-Hydroxy-2-methylpropanehydrazide (CAS 42596-46-3)
Recommended Standards
- 3-(Hydroxyamino)-3-iminopropanoic acid (CAS 55654-11-0)
- ammonia (CAS 58491-62-6)
- 2H-1,2,3,4-tetrazole-5-carboxylic acid (CAS 75773-99-8)
- Ethylene diformate (CAS 629-15-2)
- 1-(3,4-Dichlorophenyl)-2-({5-[2-(3,4-dichlorophenyl)-2-oxoethoxy]naphthalen-1-yl}oxy)ethan-1-one (CAS 383148-12-7)
- 4-(Aminomethyl)-6-fluoropyridin-2-ol (CAS 1393546-86-5)
- Ethyl (4-mercaptophenyl)carbamate (CAS 73443-73-9)
- 3-((4-Chlorophenyl)amino)propanoic acid (CAS 21617-19-6)
- Diethyl 2-(4-methoxy-2-nitrophenyl)malonate (CAS 10565-15-8)
- 4,6-Dibromoquinoline-3-carbonitrile (CAS 1260835-82-2)
- 2-Oxo-2-((2-(phenylthio)phenyl)amino)ethyl 2-(methylthio)nicotinate (CAS 560124-09-6)
- 4,5-Difluoro-2-nitrocinnamic acid (CAS 1807381-48-1)
- Rivaroxaban Impurity 158 (CAS CATO-C4X-1090158)
- Semaglutide impurity 206 (CAS CATO-C4X-2226206)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com