As I ordered DOTAP in the specification it was written that it is a powder. When we got do tap I realized that İt is a semi-solid state. I think that it has lost its stability. Am I right?
The semi-solid state could be caused by condensation of humid a specially if the DOTAP was stored at the freezer and was opened immediately after being removed from the freezer. I can check the DOTAP "state" in our fridge. If the DOTAP was new you can always ask the provider.