Formula KH2PO4, MW 136.09, CAS 7778-77-0. White or colourless crystals, density 2.338, m.p. 252.6 degC, pH of 1% solution 4.5. Used in food industry as leavening, flavouring and chelating agent; a high-efficiency PK compound fertilizer for foliar, flushing, drip and sprinkler application. Packed in 25/50/1000 kg plastic-lined woven bags; GB25560-2010.