Gemcitabine Impurity 4 CAS 134877-43-3
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 134877-43-3 |
| Molecular Formula | C20H18F2O8S |
| Molecular Weight | 456.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Gemcitabine Impurity 4 (CAS 134877-43-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C20H18F2O8S. Molecular weight: 456.41 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C20H18F2O8S |
| Molecular Weight | 456.41 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Gemcitabine Standards
- Gemcitabine Impurity 10 (CAS 122111-11-9)
- Gemcitabine Impurity 35 (CAS CATO-C4X-137235)
- Gemcitabine Impurity 11 (CAS 134790-39-9)
- Gemcitabine Impurity 16 (CAS CATO-C4X-137216)
- Gemcitabine Impurity 27 (CAS 1268237-46-2)
- Gemcitabine Impurity 28 (CAS 134790-40-2)
- Gemcitabine Impurity 38 (CAS CATO-C4X-137238)
- Gemcitabine Impurity 30 (CAS 143157-27-1)
Recommended Standards
- Pemetrexed impurity 45 (CAS CATO-C4X-172645)
- tetraethyl (4,4'-diamino-[1,1'-biphenyl]-3,3'-diyl)bis(phosphonate) (CAS CATO-C3D-262415)
- Pemetrexed impurity 47 (CAS CATO-C4X-172647)
- Raltitrexed Impurity 45 (CAS CATO-C4X-138645)
- Indobufen Impurity 86 (CAS 6555-36-8)
- 2-(3-Methyl-2-thioxo-2,3-dihydro-1H-imidazol-4-yl)acetic acid (CAS 1091908-73-4)
- 8-Bromo-7-(3-chloropropyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione (CAS 98408-17-4)
- H-Phe-Arg-βNA · 2 HCl (CAS 100929-99-5)
- Methyl 3-butyl-3-ethyl-2-isopropyloxirane-2-carboxylate (CAS 1505446-08-1)
- MOTS-c Peptide (CAS 1627580-64-6)
Why CATO?
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