4,4-Dihydroxy-1H-pyrazol-5(4H)-one CAS 373604-51-4
| CAS No. | 373604-51-4 |
| Molecular Formula | C3H4N2O3 |
| Molecular Weight | 116.08 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.
CATO supplies 4,4-Dihydroxy-1H-pyrazol-5(4H)-one (CAS 373604-51-4), a certified reference material (molecular formula C3H4N2O3, MW 116.08 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 4,4-Dihydroxy-1H-pyrazol-5(4H)-one is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 116.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures 4,4-Dihydroxy-1H-pyrazol-5(4H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C3H4N2O3 |
| Molecular Weight | 116.08 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Related Dihydroxy Standards
- 3,4-Dihydroxy-3-cyclobutene-1,2-dione (CAS 2892-51-5)
- N,2-Dihydroxy-2-methylpropanimidamide (CAS 15485-97-9)
- 4,6-Dihydroxy-2-methylpyrimidine (CAS 40497-30-1)
- 4,6-Dihydroxy-5-methylpyrimidine (CAS 63447-38-1)
- 5,6-Dihydroxy-4(3H)-pyrimidinone (CAS 98020-41-8)
- 3,4-Dihydroxy-1-methyl-1H-pyrrol-2(5H)-one (CAS 156861-94-8)
- 2,3-Dihydroxy-2,3-dimethylbutanenitrile (CAS 26429-38-9)
- 2,4-Dihydroxy-6-methylpyridine (CAS 3749-51-7)
Recommended Standards
- 1,2,4,5-Tetrazinane-3,6-dione (CAS 624-40-8)
- 4-Amino-1,2,4-triazolidine-3,5-dione (CAS 21531-96-4)
- N,N'-carbonyldiformamide (CAS 188596-19-2)
- 4-Methoxy-1,2,5-oxadiazol-3(2H)-one (CAS 372172-56-0)
- Tert-butyl ((4-bromobicyclo[2.2.2]Octan-1-yl)methyl)carbamate (CAS 916210-29-2)
- Irigenin (CAS 548-76-5)
- (E)-N-(o-Tolyl)-3-(3-(trifluoromethyl)phenyl)acrylamide (CAS 1164539-05-2)
- 6-benzyl-3-methyl-2-thioxo-2,3,5,6,7,8-hexahydropyrido[4,3-d]pyrimidin-4(1H)-one (CAS 159660-86-3)
- tert-butyl 6-hydroxy-1,1-dioxo-1,4-thiazepane-4-carboxylate (CAS 140217-83-0)
- Di-tert-butyl propane-1,1-diyldicarbamate (CAS 1496636-53-3)
- 1-(1-(2-Methoxyethyl)-1H-indol-3-yl)-3-(o-tolyl)urea (CAS 922874-67-7)
- 6-Bromo-7-methoxy-3,4-dihydroisoquinolin-1(2H)-one (CAS 1181691-33-7)
- 1,3-Dibenzyloxybenzene (CAS 3769-42-4)
- Semaglutide impurity 257 (CAS CATO-C4X-2226257)
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