1-methyl-2-oxidanylidene-pyridine-4-carboxylic acid 1-methyl-2-oxo-4-pyridinecarboxylic acid 33972-97-3 A822026 CAS 33972-97-3
| CAS No. | 33972-97-3 |
| Molecular Formula | C7H7NO3 |
| Molecular Weight | 153.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-methyl-2-oxidanylidene-pyridine-4-carboxylic acid 1-methyl-2-oxo-4-pyridinecarboxylic acid 33972-97-3 A822026 is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 1-methyl-2-oxidanylidene-pyridine-4-carboxylic acid 1-methyl-2-oxo-4-pyridinecarboxylic acid 33972-97-3 A822026 (CAS 33972-97-3), a certified reference material (molecular formula C7H7NO3, MW 153.14 g/mol) for analytical method development and quality control.
1-methyl-2-oxidanylidene-pyridine-4-carboxylic acid 1-methyl-2-oxo-4-pyridinecarboxylic acid 33972-97-3 A822026 (C7H7NO3) contains an amino-acid-derived structure, an amide 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 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-methyl-2-oxidanylidene-pyridine-4-carboxylic acid 1-methyl-2-oxo-4-pyridinecarboxylic acid 33972-97-3 A822026 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H7NO3 |
| Molecular Weight | 153.14 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, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
Related methyl Standards
- (4-oxidanylidene-2,3-dihydrochromen-6-yl) thiohypofluorite 20300-02-1 A814417 thiohypofluorous acid (4-oxo-3,4-dihydro-2H-1-benzopyran-6-yl) ester (CAS 20300-02-1)
- 2-oxidanylidene-1,3-dihydroimidazole-4-carboxylic acid 2-oxo-1,3-dihydroimidazole-4-carboxylic acid 39828-47-2 A824755 (CAS 39828-47-2)
- (E)-4-oxidanylidene-4-[[2,4,5-tris(chloranyl)phenyl]amino]but-2-enoic acid (E)-4-oxo-4-(2,4,5-trichloroanilino)-2-butenoic acid 31680-08-7 A820953 (CAS 31680-08-7)
- 6-oxidanylidene-1,2,3,4,5,7,8,8a-octahydronaphthalene-4a-carboxamide 6-oxo-1,2,3,4,5,7,8,8a-octahydronaphthalene-4a-carboxamide 922-65-6 A844183 (CAS 922-65-6)
- 2-(4-methyl-2-oxidanylidene-chromen-7-yl)oxyethanoate 2-[(4-methyl-2-oxo-1-benzopyran-7-yl)oxy]acetate 64700-15-8 A834859 (CAS 64700-15-8)
- 3-methyl-2-oxidanylidene-1,3-benzoxazole-6-sulfonyl chloride 3-methyl-2-oxo-1,3-benzoxazole-6-sulfonyl chloride 62522-63-8 A833824 (CAS 62522-63-8)
- 150114-69-5 2-oxidanylidene-2-(3,4,5-trimethoxyphenyl)ethanal hydrate 2-oxo-2-(3,4,5-trimethoxyphenyl)acetaldehyde hydrate A809008 (CAS 150114-69-5)
- 2-oxidanylidene-2-[3-(trifluoromethyl)phenyl]ethanal 2-oxo-2-[3-(trifluoromethyl)phenyl]acetaldehyde 38923-38-5 A824331 (CAS 38923-38-5)
Recommended Standards
- (1-Methyl-1H-pyrrol-2-yl)(oxo)acetic acid 21898-43-1 7442AD C7H7NO3 (CAS 21898-43-1)
- 3719-45-7 N(1)-Methyl-2-pyridone-5-carboxylic acid 3-Pyridinecarboxylic acid, 1,6-dihydro-1-methyl-6-oxo- NMPCA (CAS 3719-45-7)
- Phenyl N-hydroxycarbamate (CAS 38064-07-2)
- 2-(methylamino)pyrimidine-5-carboxylic acid 2-(methylamino)pyrimidine-5-carboxylicacid 5388-21-6 A18873 (CAS 5388-21-6)
- 3-Bromo-2-methoxyisonicotinaldehyde (CAS 1227605-71-1)
- (S)-2-(2-Chloroacetamido)hexanoic acid (CAS 56787-36-1)
- (R)-2-(3-Methoxypyrrolidin-1-yl)ethanamine (CAS 1354009-85-0)
- 2-((5-(4-Chlorophenyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-isopropylphenyl)acetamide (CAS 477331-54-7)
- 2,2'-((1,3,4-Thiadiazole-2,5-diyl)bis(sulfanediyl))diacetamide (CAS 73908-91-5)
- (r)-3-Amino-3-(5-chlorothiophen-2-yl)propanoic acid (CAS 1270060-15-5)
- 6-Methoxy-1,2,3,4-tetrahydronaphthalen-2-aminehydrochloride (CAS 4003-88-7)
- 6-Chloro-3-(2-cyclopropylphenoxy)pyridazin-4-ol (CAS 499223-32-4)
- 2,6-Dimethyl-1H-pyrazolo[1,5-b][1,2,4]triazol-7-amine (CAS 227610-62-0)
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