Property：
Boric acid, for white powder crystallization or three inclined shaft side flake crystallization, have satiny gloss, no odor. Handle Soluble in water, alcohol, glycerin, ethers and oils, aqueous show weakly acidic.
Application:
Widely used for the glass (optical glass, acid glass, heat-resistant glass, insulating material with fiberglass) industry, can improve glass products of heat, transparent performance and improve mechanical strength, shorten dissolve melting time.
Test standard：
|
Test items |
Specification |
||
|
BP2015 |
USP35 |
CP2015 |
|
|
Appearance |
White crystal powder |
White crystal powder |
White crystal powder |
|
Assay |
99.0~100.5% |
99.5~100.5% |
≥99.5% |
|
Appearance of solution |
Conform |
Conform |
Conform |
|
Ethanol solubility |
Conform |
Conform |
Conform |
|
pH |
3.8~4.8 |
|
3.5~4.8 |
|
Conform |
|
|
|
|
Chloride |
|
|
≤0.01% |
|
Sulfate |
≤0.045% |
|
≤0.04% |
|
Loss on dry |
|
≤0.5% |
≤0.5% |
|
Phosphate |
|
|
≤0.01% |
|
Heavy metals |
≤0.0015% |
≤0.001% |
≤0.007% |
|
Calcium |
|
≤0.01% |
|
|
Magnesium |
|
≤0.01% |
|
|
Ammonium |
|
≤0.001% |
|
|
Arsenic |
|
≤0.0005% |
|
|
Iron |
|
≤0.001% |
|
Storage：
Store in a cool, dry and well ventilated place. Keep away from incompatible substances. Keep container closed.
