2-(2-Phenylhydrazono)malonic acid CAS 40885-82-3
| CAS No. | 40885-82-3 |
| Molecular Formula | C9H8N2O4 |
| Molecular Weight | 208.17 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.
2-(2-Phenylhydrazono)malonic acid (CAS 40885-82-3) is a high-purity analytical reference standard with the molecular formula C9H8N2O4 and a molecular weight of 208.17 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 2-(2-Phenylhydrazono)malonic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.17 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).
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 | C9H8N2O4 |
| Molecular Weight | 208.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 2-((3-Oxo-1,3-dihydroisobenzofuran-1-yl)oxy)acetic acid (CAS 61133-41-3)
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- 2-((3-Methyl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)oxy)acetic acid (CAS 842972-52-5)
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- 2-Aminobenzoxazole-6-carbaldehyde (CAS 1806340-60-2)
- ((3-(Acetylamino)phenyl)oxy)acetic acid (CAS 6339-04-4)
- 2-Hydroxy-2-methylpropanimidamide (CAS 28100-88-1)
- (3,4-Difluorophenyl)(4-fluorobenzyl)sulfane (CAS 1443320-89-5)
- 3,4-Dimethylisatoic anhydride (CAS 67943-96-8)
- 3-(2-Ethoxyphenyl)-3-oxopropanal (CAS 1019024-34-0)
- Bortezomib Impurity 31 (CAS 1608986-16-8)
- Methyl 2,5,6-trimethoxynicotinate (CAS 1414864-16-6)
- 3-Methyl-1-[5-(trifluoromethyl)pyridin-2-yl]piperazine (CAS 866785-24-2)
- [Nva12]-Tirzepatide (CAS CATO-C4X-324042)
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