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Anhydrous citric acid is colorless translucent crystal or white fine powder crystal, odorless, with strong sour taste. Citric acid has obvious retarding effect on concrete, and the content in concrete is usually 0.03%~0.10%. When the dosage is 0.05%, the strength of 28d concrete is still improved, and the strength will be weakened by increasing the dosage. The addition of citric acid can slightly change the gas content of concrete and improve the frost resistance of concrete.
|
Item |
Unit |
BP |
USP |
FCC |
E330 |
GB1886.235-2016 |
ENSIGN |
|
Characters |
/ |
White Crystalline Powders,Colorless Crystals or Granules.Odorless, has a strongly acid taste. |
|||||
|
Identification |
/ |
Pass Test |
|||||
|
Color & Clarity of Solution |
/ |
Pass Test |
Pass Test |
/ |
/ |
/ |
Pass Test |
|
Assay |
% |
99.5-100.5 |
99.5-100.5 |
99.5～100.5 |
≥99.5% |
99.5-100.5 |
99.5-100.5 |
|
Water |
% |
≤1.0 |
≤1.0 |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.5 |
|
Readily Carbonisable Substances |
/ |
Not Darker than Standard |
Not Darker than Standard |
A≤0.52，T≥30% |
Not Darker than Standard |
≤1.0 |
Not Darker than Standard or A≤0.52，T≥30% |
|
Sulphated Ash |
% |
≤0.1 |
≤0.1 |
≤0.05 |
≤0.05 |
≤0.05 |
≤0.05 |
|
Sulphate |
ppm |
≤150 |
≤150 |
/ |
/ |
≤100 |
≤50 |
|
Chloride |
ppm |
/ |
/ |
/ |
/ |
≤50 |
≤5 |
|
Oxalate |
ppm |
≤360 |
≤360 |
≤100 |
≤100 |
≤100 |
≤50 |
|
Calcium |
ppm |
/ |
/ |
/ |
/ |
≤200 |
/ |
|
Aluminum |
ppm |
≤0.2 |
≤0.2 |
/ |
/ |
/ |
≤0.2 |
|
Arsenic |
ppm |
/ |
/ |
/ |
≤1 |
≤1 |
≤0.1 |
|
Lead |
ppm |
/ |
/ |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.1 |
|
Mercury |
ppm |
/ |
/ |
/ |
≤1 |
/ |
≤0.1 |
|
Heavy Metals |
ppm |
/ |
/ |
/ |
/ |
/ |
≤5 |
|
Bacterial Endotoxins |
IU/mg |
＜0.5 |
Pass Test |
/ |
/ |
/ |
＜0.5 |
|
Tridodecylamine |
mg/kg |
/ |
/ |
≤0.1 |
/ |
/ |
/ |
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