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Ammonium sulfate sales are divided into industrial-grade and agricultural level, coking plant production is mostly agricultural stage, its nitrogen content is up to 20.5% at most, the moisture content is more than 6%,.its color is not pure mostly ,presents yellow or red.Mostly used for chemical fertilizer industry.The caprolactam level is industrial grade.Its nitrogen content is not less than 21%, and water is less than 0.2%.The ammonium sulfate in our co***ny has already reached caprolactam level, a |