Lapatinib Ditosylate Monohydrate CAS 388082-78-8 Purity >99.0% (HPLC)
Chemical Name | Lapatinib Ditosylate Monohydrate |
Synonyms | N-[3-chloro-4-[(3-fluorophenyl)methoxy]phenyl]-6-[5-[(2-methylsulfonylethylamino)methyl]furan-2-yl]quinazolin-4-amine |
CAS Number | 388082-78-8 |
Stock Status | In Stock |
Molecular Formula | C29H26ClFN4O4S·2(C7H8O3S)·H2O |
Molecular Weight | 943.48 |
COA & MSDS | Available |
Origin | Shanghai, China |
Brand | Ruifu Chemical |
Item | Specifications |
Appearance | Pale Yellow to Yellow Crystalline Powder |
Purity / Analysis Method | ≥99.0% (HPLC) |
Melting Point | 240.0~242.0℃ |
Moisture (K.F) | 1.9~2.4% |
Single Impurity | ≤0.50% |
Total Impurities | ≤1.00% |
Heavy Metals (as Pb) | ≤20ppm |
Test Standard | Enterprise Standard |
Usage | API; For the treatment of patients with breast cancer |
Package: Bottle, Aluminium foil bag, 25kg/Cardboard Drum, or according to customer's requirement
Storage Condition: Store in sealed containers at cool and dry place; Protect from light and moisture


Lapatinib Ditosylate Monohydrate (CAS: 388082-78-8) is the ditosylate salt of CAS 231277-92-2, a synthetic, orally-active quinazoline with potential antineoplastic activity. It reversibly blocks phosphorylation of the epidermal growth factor receptor (EGFR), ErbB2, and the Erk-1 and-2 and AKT kinases; it also inhibits cyclin D protein levels in human tumor cell lines and xenografts. EGFR and ErbB2 have been implicated in the growth of various tumor types. It was launched for the treatment of advanced or metastatic HER2 (ErbB2) positive breast cancer in women who have received prior therapy. The drug was discovered and developed by GlaxoSmithKline.
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