Alfa Chemistry provides synthetic peptides with a wide range of labels, scales, purities and delivery time options to meet your research needs. We ensures that each custom peptide is triple checked for quality via both mass spectrometry(MS) and high performance liquid chromatography (HPLC) analyses after each step during peptide purification and quality control (QC) procedures. http://www.alfa-chemistry.com/services/api-research-development.html