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Methylsulfonylmethane (MSM)
INCI: Methylsulfonylmethane or dimethyl sulfone
What is it?
MSM (also called dimethyl sulfone) is a sulfur-containing compound made entirely synthetically, by oxidizing DMSO (dimethyl sulfoxide) with hydrogen peroxide and then purifying the result. It occurs naturally in trace amounts in things like milk, but at levels far too low to be a practical source, so every commercia...
How is it used?
Add it to the water phase. Trade sources describe it as heat-stable and not fussy about pH, but stability-test your specific formula rather than assuming total inertness, since this isn't backed by a dedicated primary stability study.
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