Olopatadine Impurity 29 CAS 156-38-7
| CAS No. | 156-38-7 |
| Molecular Formula | C8H8O3 |
| Molecular Weight | 152.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Olopatadine Impurity 29 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.
Olopatadine Impurity 29 (CAS 156-38-7) is a certified pharmaceutical impurity reference standard with the molecular formula C8H8O3 and a molecular weight of 152.15 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Olopatadine Impurity 29 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 152.15 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C8H8O3 |
| Molecular Weight | 152.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Olopatadine Standards
- Olopatadine Impurity 45 (CAS 834-25-3)
- Olopatadine Impurity 46 (CAS 23560-66-9)
- Olopatadine impurity 147 (CAS CATO-C4X-1135147)
- Olopatadine Impurity 35 (CAS 89019-82-9)
- Olopatadine Impurity 30 (CAS 728-97-2)
- Olopatadine lmpurity 57 (CAS CATO-C4X-171857)
- Olopatadine Impurity 12 (CAS 66801-40-9)
- Olopatadine USP Related Compound C (CAS 55453-87-7)
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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