A containment and transfer device for use with highly active or sensitive compounds, comprising a sleeve or a bag with one or more flexible walls, a first sanitary clamp, an endcap, a second sanitary clamp and a compression clamp. The sleeve or bag has a first end for connection to a container, and a second end for (a) connection to a storage or mixing vessel at the discharge location, or (b) connection to an endcap for transportation. The flexible walls surround and define an internal passageway in that permits compounds in the first end of the sleeve or bag to pass into the second end of the sleeve or bag. The compression clamp compresses the flexible walls of the sleeve or bag together to produce a barrier across the internal passageway, preventing the highly active or sensitive compound from flowing into the second end of the sleeve or bag during packing, transporting and discharging the device.
