Gefitinib (ZD1839) Sigma (SML1657)? Try a better option.

A Depth-Data-Driven Comparison: Critical Reasons Leading Labs are Switching from Sigma to Selleck’s Gefitinib (ZD1839).

Gefitinib (ZD1839) Selleck VS Sigma

Gefitinib (ZD1839)	Selleck(S1025)	Sigma(SML1657)
Free Aliquoting Service		N/A
Price	100mg, USD 197.0	10mg, USD 119.00
Purity	99.99%	98%
Citations	752	66
Technical Support	95.37% response rate within 2 hours	Unknown
Knowledge	Gefitinib (ZD1839) Mechanism of Action: EGFR Inhibition in Non-Small Cell Lung Cancer Cells Research Gefitinib (ZD1839) Working Concentration \| Cell Culture \| Treatment Gefitinib (ZD1839) Solubility in DMSO Gefitinib (ZD1839) Storage & Stability Gefitinib (ZD1839) Combination Database Gefitinib (ZD1839) Molecular Weight \| Chemical Structure \| Stock Solution Gefitinib (ZD1839) IC50 for Cell-based and Cell-free Assays Gefitinib (ZD1839) SDS｜MSDS	Unknown

Sigma is sourced from their official website（1/20/2026）