1.1 This practice covers a nonspecific, acute toxicity test used for detecting leachables from materials used in medical devices. 1.2 The liquids injected into the mouse are those obtained by Practice F 619 where the extraction vehicles are saline, vegetable oil, or other liquids simulating human body fluids. 1.3 Two procedures are outlined: Method A for intravenous injection and Method B for intraperitoneal injection. 1.4 This practice is one of several developed for the assessment of the biocompatibility of materials. Practice F 748 may provide guidance for the selection of appropriate methods for testing materials for a specific application.