普通硫化碱质量指标
序号 指标名称                           指标
01 1500PPM硫化碱  
02 硫化钠/Na2S(%)                      60.0Min
03 碳酸钠/Na2CO3(%)                 5.0Max
04 水不溶物/Water Insoluble(%)   0.4max
05 铁/Fe(%)                                0.15max
 
低铁硫化碱质量指标 
序号   指标名称                           指标
01    150PPM                             低铁硫化碱 
02    硫化钠/Na2S(%)                 60.0Min
03 碳酸钠/Na2CO3(%)                2.0Max
04 水不溶物/Water Insoluble(%)  0.2max
05 铁/Fe(%)                               0.015max
06 80PPM/50PPM低铁硫化碱 
07 硫化钠/Na2S(%)                    60.0Min
08 碳酸钠/Na2CO3(%)                2.0Max
09 水不溶物/Water Insoluble(%)  0.2max
10 铁/Fe(%) 0.008max                0.005max 
11 30PPM/20PPM低铁硫化碱   
12 硫化钠/Na2S(%)                    60.0
13 碳酸钠/Na2CO3(%)               2.0Max
14 水不溶物/Water Insoluble(%) 0.05max/0.03max
15 铁/Fe(%)                       0.003max 0.002max 

序号 检测项目                 分析纯（二级）            化学纯（三级）
1 含量（Na2S.9H2O）%           98                            96
2 澄清度试验                             合格                        合格
3 水不溶物，%                        ≤   0.002                ≤0.0005
4 铵盐（NH4）%                     ≤0.002                  ≤0.006
5 碘氧化物（以Na2SO4.5H2O）计% ≤0.5              ≤1.0