Fluorouracil EP Impurity E CAS 1820-81-1
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 1820-81-1 |
| Molecular Formula | C4H3ClN2O2 |
| Molecular Weight | 146.53 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Fluorouracil EP Impurity E (CAS 1820-81-1) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C4H3ClN2O2. Molecular weight: 146.53 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C4H3ClN2O2 |
| Molecular Weight | 146.53 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Fluorouracil Standards
- Fluorouracil Impurity 26 (CAS 62836-98-0)
- Fluorouracil Impurity 12 (CAS 155-16-8)
- Fluorouracil Impurity 11 (Mixture of Diastereomers) (CAS 37103-91-6)
- Fluorouracil Impurity 3 (CAS 4840-69-1)
- Fluorouracil Impurity 10 (CAS 1480-96-2)
- Fluorouracil EP Impurity D (CAS 6623-81-0)
- Fluorouracil Impurity 22 (CAS CATO-C4X-164922)
- Fluorouracil Impurity 30 (CAS CATO-C4X-164930)
Recommended Standards
- Alogliptin Impurity 57 (CAS 4270-27-3)
- 2-Amino-4-hydroxy-6-chloro-s-triazine (CAS 38862-29-2)
- Ceritinib Impurity 77 (CAS CATO-C4X-104877)
- Calcitriol Impurity 60 (CAS CATO-C4X-151060)
- Etelcalcetide Impurity 22 X TFA Salt (CAS CATO-C4X-324722)
- N-(3-bromophenyl)-4-((2-chlorothiazol-5-yl)methoxy)benzenesulfonamide (CAS 339105-51-0)
- N-(2-Methyl-4,5-dihydrothiazolo[4,5-h]quinazolin-8-yl)benzamide (CAS 827598-52-7)
- Ethyl 2,4-dioxo-6-phenylhex-5-enoate (CAS 1027-41-4)
- Cis-9-hexadecenyl acetate (CAS 34010-20-3)
- Semaglutide impurity 250 (CAS CATO-C4X-2226250)
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