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It is extracted by calcium carbonate taking fermentative starch as material. It is important chemical raw material applied in food, medical, chemical, leather, printing and non-toxic electroplating and atomic energy industriea.
Appearance: colorless crystal or white crystal powder
Physical index:
Molecular formula: C6H8O7•H2O
Molecular weight: 210.14
Structural formula:
Quality index
Testing item |
Unit |
Standards |
definition |
|
qualified |
features |
|
qualified |
identifying test |
|
qualified |
appearance |
|
qualified |
readily carbonizable substances |
|
qualified |
oxalic acid < |
PPM |
350 |
sulfate < |
PPM |
150 |
heavy metal < |
PPM |
10 |
moisture < |
% |
7.5-9.0 |
ash content < |
% |
0.1 |
bacterial endotoxin < |
Iu/mg |
0.5 |
aluminum < |
PPM |
0.2 |
content |
% |
99.5-101 |
Main uses: used in food and drink industries as sour agent, condiment and preservative; in chemical, cosmetic and washing industries, as antioxidant, plasticizer and detergent;
Packaging: 25kg in bag, 1000 kg in palletizing package, 500-1000kg in bags;
Storage: in dry and cool place in seal