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Specifications
| Grade | USP |
| Appearance | White or off-white crystalline powder |
| Assay (T on dried basis) | 98% ~ 101% |
| Purity (HPLC) | 99% min |
| Water | 0.5% max |
| Identification | A IR B Dissolve 50 mg in 5 ml of acetone and dilute with water to 10 ml. Add 1 drop of 2 N sulfuric acid, then add 4 drops of silver nitrate TS: no opalescence is observed immediately (absence of chloride ion). Warm the solution on a steam bath, opalescence develops (presence of ionizable chlorine). |
| Solubility | Color: colorless or faint brown Turbidity: clear Method: 100 mg/ml in ethanol |
| Melting point | 65-69 °C |
| Residual solvent | Ethyl acetate: 5000 ppm max Isopropanol: 5000 ppm max Toluene: 890 ppm max N-hexane: 290 ppm max |
Applications
Chlorambucil (CAS 305-03-3) is a well-established chemotherapeutic drug belonging to the nitrogen mustard class of alkylating agents. Its main application is in the treatment of certain cancers, particularly hematologic malignancies such as chronic lymphocytic leukemia (CLL), Hodgkin's lymphoma, non-Hodgkin's lymphoma, and Waldenström's macroglobulinemia. It works by binding covalently to DNA, forming cross-links that prevent replication and transcription, ultimately leading to cell death. Chlorambucil is usually administered orally in tablet form, which provides convenient dosing compared to many other chemotherapeutic drugs that require intravenous administration. Due to its effectiveness and relatively predictable pharmacological profile, it remains a treatment option, especially for patients who cannot tolerate more aggressive chemotherapy regimens.
Benefits
The benefits of Chlorambucil are tied to its therapeutic effectiveness and clinical manageability. It has a long history of successful use in controlling blood-related cancers, often leading to significant disease remission or symptom improvement. As an oral chemotherapy, it provides greater convenience for patients and reduces the need for frequent hospital visits. Chlorambucil is generally well tolerated at carefully managed doses, making it a suitable option for elderly patients or those with comorbidities who may not withstand intensive chemotherapy. It also serves as a bridging therapy, helping to stabilize disease progression while preparing patients for advanced treatments such as bone marrow or stem cell transplantation. Its predictable absorption and activity allow clinicians to tailor treatment regimens effectively, balancing efficacy with side-effect management.
Conclusion
In conclusion, Chlorambucil remains an important chemotherapeutic drug in the treatment of hematologic cancers. Its oral availability, established track record, and manageable side-effect profile make it a valuable option for patients requiring effective yet less aggressive therapy. By contributing to disease control, improving patient quality of life, and serving as a complementary or bridging treatment, Chlorambucil continues to hold relevance in modern oncology when applied responsibly under medical supervision.
