Patent ID: 8302813

Claim:
A connecting device for pre-insuring proper connection of chemicals, comprising: a bottle closure having a dip tube passage and a first key code pattern on a top end; a rupturable film disposed on the dip tube passage of the bottle closure; a connector having an upper member and a lower member for coupling with the bottle closure, wherein the upper member comprises a dispensing outlet and the upper surface and a second key code pattern configured to mate with the first key code pattern on the bottom surface, wherein the lower member is pivotally coupled to the upper member; a dip tube passing through the connector and connecting to the dispensing outlet; and a pre-check member having a puncturing structure for puncturing through the rupturable film, wherein the pre-check member has a key code pattern configured substantially identical to the second key code pattern to mate with the first key code pattern, wherein the puncturing structure of the pre-check member punctures through the rupturable film when the key code pattern thereon mates with the first key code pattern.