University doesn't know, they can't keep track of what a single user is buying. It gets to the mail room and tagged to the information of the student, I have all my packages rerouted to the normal mail room so even if the distributors thought that it would go to a lab, the university mail room kept it, then all I did was grab it like any other normal package that any other normal student would get.
And the distributor just saw that I registered as a professor and was requesting to buy some for educational purposes with an email domain of the university. That's all they need to know and didn't even bother verifying, so as soon as I payed for it they sent it to my university. All 1.5kg was split into 3 bottles, each with 500g, all 3 in a normal cardboard box. Only thing differentiating it from any other package is the label which says where it's from but it doesn't say what's in it, so it really is just a normal package.
Neither party knows, they could look into it if they cared, but they don't have a reason to look so closely at random student's packages without some explicit reason. The distributor knows exactly how it can be used, but expects that current restrictions are enough to stop someone from buying it for using it for this.