Sunitinib molecular weight?

What is sunitinib’s molecular weight?

Sunitinib (the active ingredient in sunitinib malate products such as Sutent) has a molecular weight of about 398.47 g/mol for the free base (sunitinib).

Does the salt form change the molecular weight?

Yes. Many products use sunitinib malate as the salt, so the molecular weight can be reported for the salt form instead of the free base. If you need the exact value for sunitinib malate (not just sunitinib base), tell me whether you want the molecular weight for sunitinib or sunitinib malate.

Quick check: what do you need it for?

If you’re using the value for lab calculations (e.g., preparing a solution by mg/mL or converting between molarity and mass), the distinction between base vs. malate matters. Share your intended unit conversion (mg/mL to mM, etc.) and the form you’re using, and I can compute the exact amount to weigh.