The home of SwiftCraftyMonkey Formulating Inc.! Join Susan as she obsesses about cosmetic chemistry and other things (some possibly related to monkeys). Often strange, occasionally useful, and always worth a stop as a point of interest on your journey through the Intertron.
What does parts per million (ppm) mean? Let’s say we have a new butter and we see that it has 100 milligrams of Vitamin E in 1 kilogram. This means we have 100 parts Vitamin E per million. 1 milligram is 1/1000 of a gram 1 kilogram is 1000 grams Therefore 1 milligram is 1/1,000,000…