[CLOSED PR] DMSO - Chem that causes injection on touch with chems

[Flaborized]

Don't like this at all, would make instant application of Very Strong chems very easy for non-antags, can imagine 'fun' things like neurotoxin and phlog being poured on wizards or lings or what-have-you. Chemistry needs careful consideration wrt balance and this PR does not Have Careful Consideration imo