CTL-Cryo ABC are buffered solutions containing injection-grade water supplemented with amino acids, vitamins, inorganic salts, and human serum albumin in a proprietary composition. CTL CryoA requires the addition of 20% high grade DMSO (Cryo B) at the time of use, which is included separately within the kit (MSDS form provided). Slight changes in pH might occur resulting in fluctuation of color – however, this does not affect the media’s performance.