Hygromycin B, Streptomyces sp., Sterile-Filtered Solution in PBS, Cell Culture-Tested^ 20ml. Liquid formulation of Hygromycin B, Streptomyces sp.(VWR # 80501-088). Sterile-filtered at 50 mg/ml active antibiotic in PBS, pH 7.2. Purity: >=90% by HPLC and TLC. RTECS WK2130000, CAS 31282-04-9. This listing is for Each