Biochem/physiol Actions Phosphatidylcholine-specific phospholipase C (PLC) and HIV-1 inhibitor. Xanthogenate derivative with in vitro anti-tumor activity. Caution The product is readily soluble in water. However it is very labile in solution (1.5 days half-life in tissue culture medium) and is readily hydrolyzed below pH 6.0. Prepare solutions immediately before use. Discard the unused solution. For tissue culture preparations, the media should be buffered to pH 6.0-7.5. HEPES buffer must not be used as it renders this product toxic. General description For tissue culture preparations, the media should be buffered at pH 6.0 to 7.4. HEPES buffer must not be used as it renders this product toxic.