Pyridine-3,4-dicarboxylic Anhydride CAS 4664-08-8
| CAS No. | 4664-08-8 |
| Molecular Formula | C7H3NO3 |
| Molecular Weight | 149.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Pyridine-3,4-dicarboxylic Anhydride (CAS 4664-08-8), a certified reference material (molecular formula C7H3NO3, MW 149.10 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, Pyridine-3,4-dicarboxylic Anhydride is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 149.10 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).
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.
Physical & Chemical Properties
| Molecular Formula | C7H3NO3 |
| Molecular Weight | 149.10 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Pyridine Standards
- Pyridine, 2-(3-azetidinylmethyl)- (CAS 1228230-91-8)
- 130343-15-6 Pyridine, 4-(2-pyrrolidinyl)-, (-)- (9CI) (CAS 130343-15-6)
- Pyridine-2-thioacetonitrile (CAS 7521-19-9)
- pyridine-3-carbonyl chloride (CAS 10400-19-8)
- Ethyl Pyridine-2-carboxylate (CAS 2524-52-9)
- 2,6-Pyridine dimethanol (CAS 1195-59-1)
- Pyridine, 2-(1H-pyrrol-3-yl) (CAS 79560-99-9)
- Pyridine, 4-chloro-3-isocyanato- (CAS 1250977-48-0)
Recommended Standards
- Ethyl 2-cyano-2,2-difluoroacetate (CAS 219866-72-5)
- rel-(3S)-3-Hydroxy-D-aspartic acid (CAS 6532-76-9)
- D,L-threo-β-Hydroxy Aspartic Acid (CAS 4294-45-5)
- 2,3-Pyridinedicarboxylic Anhydride (CAS 699-98-9)
- tert-Butyl 2-(((1-(pyridin-2-yl)ethyl)amino)methyl)piperidine-1-carboxylate (CAS 1353972-38-9)
- 4-Chloro-2-(thiophen-3-yl)benzoic acid (CAS 1261969-28-1)
- Canertinib Dihydrochloride (CAS 289499-45-2)
- Molindone (CAS 7416-34-4)
- 3-Methylanthracene-1,8,9-triol (CAS 491-59-8)
- 2-(Pyrrolidin-2-yl)phenol hydrochloride (CAS 1894060-68-4)
- 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-3-(2,4-dimethoxypyrimidin-5-yl)urea (CAS 1448037-97-5)
- Ethyl 1-Benzylpyrazole-3-carboxylate (CAS 174907-58-5)
- Amorolfine Impurity 91 (CAS CATO-C4X-154291)
- Semaglutide impurity 56 (CAS CATO-C4X-222656)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com