citric acid

1.CITRIC ACID Quality Standard of Citric-Acid Anhydrous Item Unit Enterprise standard BP2008 USP31 FCC6 E330 GB 19872007 Appearance colorless crystal or white crystalline powder Identification Conforming with the test Clarity (405nm light transmission) % ≥98.0 Confor-ming with the test Confor-ming with the test Confor-ming with the test Confor-ming with the test ≥96.0 Assay % 99.5-100.5 99.5-100.5 99.5-100.5 99.5-100.5 ≥99.5 99.5-100.5 Moisture % ≤0.15 ≤1.0 ≤1.0 ≤0.5 ≤0.5 ≤0.5 RCS (1g+10ml) ≤1.40B·U Not beyond the standard Not beyond the standard Not beyond the standard Not beyond the standard ≤1.0 (Not beyond the standard) Calcium salt ppm ≤10≤200 Iron salt ppm ≤1≤5 Chlorides ppm ≤5≤50 Sulphates ppm ≤20 ≤150 ≤150≤100 Oxalates ppm ≤20 ≤360 ≤360 ≤100 ≤100 ≤100 Heavy metal ppm ≤1 ≤10 ≤10 ≤5 Lead ppm ≤0.5≤0.5 ≤1 ≤0.5 Arsenic ppm ≤0.2≤1 ≤1 Aluminium ppm ≤0.2 ≤0.2 ≤0.2Mercury ppm ≤0.1≤1 Sulphate ash % ≤0.03 ≤0.1 ≤0.1 ≤0.05 ≤0.05 ≤0.05 Insol. in water Meet the specificationMeet the specification Bacterial endotoxin IU/mg ≤0.5 ≤0.5Tridodecylamine ppm ≤0.1≤0.1Whiteness % ≥82Granularity upon clients' requests