2-(5-Methoxy-1,2-benzoxazol-3-yl)acetic acid CAS 34172-98-0
| CAS No. | 34172-98-0 |
| Molecular Formula | C10H9NO4 |
| Molecular Weight | 207.18 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.
2-(5-Methoxy-1,2-benzoxazol-3-yl)acetic acid (CAS 34172-98-0) is a high-purity analytical reference standard with the molecular formula C10H9NO4 and a molecular weight of 207.18 g/mol.
2-(5-Methoxy-1,2-benzoxazol-3-yl)acetic acid (C10H9NO4) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C10H9NO4 |
| Molecular Weight | 207.18 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.) | 1966 |
| Nitrogen Atoms | 1 |
Related Methoxy Standards
- 4-Methoxy-5-nitro-2,3-dihydro-1H-inden-1-one (CAS 1116359-18-2)
- 5-Methoxy-benzo[d]isoxazole-3-carboxylic acid methyl ester (CAS 1123169-16-3)
- 5-Methoxy-4-nitro-2,3-dihydro-1H-inden-1-one (CAS 1273655-86-9)
- 6-Methoxy-7-nitro-2,3-dihydro-1h-inden-1-one (CAS 196597-96-3)
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Recommended Standards
- 2-(5-Hydroxy-3-oxoisoindolin-1-yl)acetic acid (CAS 94512-05-7)
- 2-(6-Methoxybenzo[d]isoxazol-3-yl)acetic acid (CAS 34200-00-5)
- 2-(5,6-Dihydroxy-1H-indol-3-yl)acetic acid (CAS 67615-73-0)
- 2-(7-Methoxybenzo[d]isoxazol-3-yl)acetic acid (CAS 33026-03-8)
- 1-(4-Chloro-3-(trifluoromethyl)phenyl)-3-oxocyclobutanecarbonitrile (CAS 1432048-96-8)
- 6-Amino-1-(2-methylallyl)pyrimidine-2,4(1H,3H)-dione (CAS 366445-27-4)
- N-(4-Aminophenyl)-2-(2-methylphenoxy)acetamide (CAS 313518-46-6)
- L 759633 (CAS 174627-50-0)
- 5-(4-Chlorobenzyl)-7-methyl-2,3-dihydrobenzo[b][1,4]thiazepin-4(5H)-one (CAS 478246-68-3)
- 3-(2-Bromo-4-methoxyphenoxy)pyrrolidinehydrochloride (CAS 1220017-76-4)
- 1-Cyclopropyl-2-(thietan-3-ylamino)ethan-1-ol (CAS 1849294-88-7)
- [2-(cyclopentyloxy)-4-methoxyphenyl]methanamine (CAS 1247532-89-3)
- 1-(4-Chloro-5-methylpyrimidin-2-yl)piperidin-3-ol (CAS 1261234-70-1)
- Semaglutide Impurity 161 (x TFA Salt) (CAS CATO-C4X-2226161)
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