FAQs

Why does bacteriological grade agar require Gelidium or Pterocladia as a raw material instead of Gracilaria?

 Bacteriological grade agar demands absolute biological inertness, high clarity, and strict batch-to-batch consistency. Gelidium and Pterocladia (Order Gelidiales) naturally provide an optimal agarose-to-agaropectin ratio with minimal ionic impurities. Gracilaria requires aggressive alkaline processing that often leaves behind traces of minerals, alkali residues, or micro-fatty acids that can act as metabolic inhibitors for highly sensitive, fastidious clinical pathogens. Furthermore, Gelidium agar provides superior physical syneresis control and micro-diffusion capabilities, ensuring critical nutrients disperse uniformly through the solid agar gel matrix without premature syneresis (sweating).