Allocating master student schedules to fit semi-commercial research interests
First, see if you can find some existing university policy you could use as a basis for a complaint.  The other place you could look would be in some professional societies for their ethics policies.  Your university would not be bound to follow ethics recommendation made by outside bodies, but still it could be a useful reference to help you apply pressure.

If there is no university (or government) ethics policy in place, then you can lobby for one to be created.  Look at some general ethics policies and try to draw something up as a proposal.

I don't know where in your university governance structure you could submit a proposal of this sort -- that could vary from country to country or even by institution.

Once you have a proposal or a platform, you need broad support.  It's okay if you don't have a ton of people supporting it initially.  As you become more public in advocating for your university to comply with its own policy, or for it to enact a policy, people will join you.  Be ready to catch them with at minimum a google group.

Hopefully you can get some faculty to join with you in advocating for some clear limits for the chemistry students' non-academic requirements.  Hopefully they will see that the level of excellence of the institution will go down if students are spending too much time on "production", and not enough time expanding their knowledge and creativity.

Point of comparison: in the U.S., graduate teaching assistants work 20 hours a week.  Based on my experience as a TA, I would say that it would be difficult or impossible for most mere mortals to make significant progress in the graduate studies if the work hours per week were above 25.