T8902 SIGMA Thiostrepton from Streptomyces azureus ≥90% (HPLC) CAS Number: 1393-48-2 Empirical Formula (Hill Notation): C72H85N19O18S5 Molecular Weight: 1664.89 assay ≥90% (HPLC) solubility acetic acid: soluble25 mg/mL, clear to hazy, yellow to brownish-yellow storage temp. −20°C