Doxycycline EP Impurity A CAS 3219-99-6
Purity >90%In StockPharmacopoeial Impurity Standards
| CAS No. | 3219-99-6 |
| Molecular Formula | C22H24N2O8 |
| Molecular Weight | 444.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Doxycycline EP Impurity A (CAS 3219-99-6) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C22H24N2O8. Molecular weight: 444.43 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C22H24N2O8 |
| Molecular Weight | 444.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >90% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Doxycycline Standards
- Doxycycline EP Impurity C (CAS 6543-77-7)
- Doxycycline EP Impurity D (CAS 97583-08-9)
- Doxycycline Impurity 8 (CAS CATO-C4X-19318)
- Doxycycline (CAS 564-25-0)
- Doxycycline Impurity 21 (CAS CATO-C4X-193121)
- Doxycycline EP Impurity F (CAS 122861-53-4)
- Doxycycline EP Impurity B (CAS CATO-C4X-19312)
- Doxycycline-d3 (CAS 2747918-45-0)
Recommended Standards
- Thalidomide-O-PEG3-propargyl (CAS 2098799-76-7)
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- Methyl 4-O-[4-6-O-benzylidene)-β-D-galactopyranosyl] β-D-glucopyranoside (CAS 56865-31-7)
- Bisoprolol Impurity 72 (CAS 2999705-55-2)
- Semaglutide Impurity 2 (CAS CATO-C4X-22262)
- 2-(2-(4-(Tert-butyl)phenyl)-5-methyloxazol-4-yl)acetic acid (CAS 1017181-51-9)
- Methyl 4-(oxazol-2-yl)benzoate (CAS 421553-40-4)
- Levodopa Impurity 12 (CAS 25520-73-4)
- 5-Oxo-N-(pyridin-2-ylmethyl)-1,4-thiazepane-3-carboxamide (CAS 1396631-59-6)
- Pancreatic Polypeptide (1-17)-(Ala31,Aib32)-Neuropeptide Y (18-36) (human) trifluoroacetate salt (CAS 313988-70-4)
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 13829788188 / jacky.chen@cato-chem.com