Food grade magnesium sulfate heptahydrate

Magnesium sulfate heptahydrate, also known as thiopicr, bitter salt, laxative salt, laxative salt, chemical formula MgSo4 · 7H20), is a white or colorless needle shaped or inclined columnar crystal, odorless, cool and slightly bitter. Mainly used in fertilizers, leather making, printing and dyeing, catalysts, papermaking, plastics, ceramics, pigments, matches, explosives, and fireproof materials, it can be used for printing and dyeing thin cotton cloth and silk, as a weighting agent for cotton silk and a filler for kapok products, and as a laxative in medicine.