Every peptide (including crude) is shipped with HPLC and MS. A bonus that CPC provides with its QC package is a recommended solubility test on each peptide. This solubility test utilizes solvents that are applicable for your experiment (water is the first choice), and can be customized according to the customer’s specifications. The test will save you time and effort in trying to determine the solubility and will also save peptide because you won’t need to use a small sample for testing if you do not have the ability to lyophilize the peptide.
