assay(分析纯度):99。5% specific gravity(25c/25c)比重:1。2607min colour(颜色):apha10max fatiy acids —esters(0。5n naoh)脂肪酸酯:1。0ml max ash灰份:0。01max chlorides氮化物:10ppm max sulphates硫酸盐:20ppm max chlorinated compounds氮化化合物:ppm max arsenic砷含量:1。5ppm max heavy metals重金属含量:5。0ppm max