Pharmaceutical excipients
Boric acid

Product name

Boric acid

Specification

Pharmaceutical grade (USP,BP,EP,CP)

Molecular formula

H3BO3

CAS

10043-35-3

H.S. CODE

2810002000

Molecular weight

62

Appearance

White crystal powder

Package

25KG Woven bags or fiber drums

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

· Organic matter

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.

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