This document specifies the terms and definitions, grades and markings, general requirements, technical requirements, test methods, inspection rules, packaging, marking, storage and transportation of citrate gypsum. This document applies to citric acid gypsum by-product in the process of producing citric acid using biomass as raw material, using microbial fermentation technology and calcium salt precipitation method. For organic acid gypsum such as lactic acid gypsum and malic acid gypsum, please refer to this document.