CAS 64-18-6 appears in our catalog under these names: Formic acid, ACS, 88+% , Formic acid, ACS, 96+% , Formic acid, 97% , Formic acid, 85% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 500ml, *4x500ml, 2L, 500g, *4x500g, 2kg, 10000g, 2500g.