The present disclosure relates to an injector containing a processor, a pump or a motor with advance for a piston, which is suitable for driving liquid out of a cartridge, a data storage device, a device for data transfer, wherein the processor is electronically connected to the data storage device, to a control unit for the pump or the motor, and to the device for data transfer; wherein the injector is suitable for being connected to a container or a cartridge for fluid transfer, which container or cartridge contains a multiplicity of doses of a parenteral solution; wherein a data storage device is fixedly connected to the container or the cartridge; wherein the device for data transfer is suitable for reading out information from the data storage device on the container or the cartridge; and wherein at least one specification in respect of the identity of the product stored in the container or in the cartridge is stored in the data storage device on the container or the cartridge. The disclosure furthermore relates to a container or a cartridge, which contains a multiplicity of doses of a parenteral solution, wherein a data storage device is fixedly connected to the container or the cartridge.