焦 SODIUM PYROPHOSPHATE
质量指标 | Specification | GB 1886.339-2021 | FCC VII | ||||
含量 | 无水(Na4P2O7),w/% | Content | Anhydrous(Na4P2O7),w/% | 96.5-100.5 | 95.0-100.5 | ||
十水(Na4P2O7·10H2O),w/% ≥ | Decahydrate(Na4P2O7·10H2O),w/% ≥ | 98.0 | ———— | ||||
水不溶物,w/% ≤ | Insoluble Substances,w/% ≤ | 0.2 | 0.2 | ||||
pH值(10g/L溶液) | pH value(10g/L Solution ) | 9.9-10.7 | ———— | ||||
盐,mg/kg ≤ | Orthophosphate,mg/kg ≤ | 通过试验 | ———— | ||||
(As),mg/kg ≤ | Arsenic (As),mg/kg ≤ | 3.0 | 3.0 | ||||
重金属(以Pb计),mg/kg ≤ | Heavy metal (as Pb),mg/kg ≤ | 10 | ———— | ||||
铅(Pb),mg/kg ≤ | Lead (Pb),mg/kg ≤ | 4.0 | 4.0 | ||||
氟化物(以F计),mg/kg ≤ | Fluoride (as F),mg/kg ≤ | 50.0 | 50.0 | ||||
灼烧失重,w/% | 无水物 ≤ | Loss on ignition,w/% | Anhydrous≤ | 0.5 | 0.5 | ||
十水合物 | Decahydrate | 38.0-42.0 | 38.0-42.0 |