BORAX EXTRA PURE , LABORATORY CHEMICALS

BORAX( DI-sodium Tetraborate )
Certificate of Analysis
Buffer Substance

NA₂B₄O₇, 10H₂O	M.W. 381.37
Assay	99.5- 102.5%

Maximum Limits of Impurities:
Insoluble matter	0.003%
Boric Oxide(B₂O₃)	0.2%
Sodium Oxide (Na₂O)	0.2%
Carbonate(CO₃)	0.05%
Chloride (CI)	0.0005%
Phosphate(PO₄)	0.001%
Sulphate(SO₄)	0.0025%
Arsenic(As)	0.0002%
Calcium(Ca)	0.002%
Copper(Cu)	0.0005%
Iron(Fe)	0.0005%
Lead(Pb)	0.0005%
Magnesium(Mg)	0.002%

CAS No: 1303-96-4