The Specification of Citric Acid
ITEMS |
SPECIFICATION |
RESULTS |
Characteristics |
Colorless or white crystal |
Colorless or white crystal |
Identification Test |
Pass the test |
Pass the test |
Clarity&Colour Of Solution |
20% water solution clarity |
20% water solution clarity |
Assay |
≥99.50% |
99.82% |
Moisture |
7.5~9.0% |
8.57% |
Sulphated Ash |
≤0.1% |
0.04% |
Sulphate |
≤150ppm |
<150ppm |
Oxalate |
≤350ppm |
<80ppm |
Calcium |
≤200ppm |
<50ppm |
Heavy Metals |
≤10ppm |
<5ppm |
Iron |
≤50ppm |
<10ppm |
Chloride |
≤50ppm |
<30ppm |
Barium |
Pass the test |
Pass the test |
Readily Carbonbnised Substance |
Standard colour |
Less than Standard colour |