chlorophyll a is a chemical compound registered under CAS number 22309-13-3, with the molecular formula C55H72 Mg N4 O5 and a molecular weight of about 893.48 g/mol. It is also known as 3-Phorbinepropanoic acid,9-ethenyl-14-ethyl-21-(met. DeWeiChem supplies chlorophyll a for laboratory research and bulk production; product code 1088163. Send an inquiry for purity, packaging, price and lead time.