PF-06658607 is an alkynylated irreversible Brutons tyrosine kinase (BTK) inhibitor that covalently reacts with active site cysteines in the ATP-binding pocket. PF-06658607 can be used to detect "off "-targets for covalent kinase inhibitors in cancer cells. The alkyne moiety allows for azide-based detection probe via copper-catalyzed click chemistry.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.