Disodium Octaborate Tetrahydrate (21%)
Formula
Boron
B2O3
Na2O
Purity
Na2B8O13.4H2O
20.5 % min.
67.5% min.
17.0% max.
99.5% min.
Impurities
Arsenic
Lead
Iron (as Fe2O3)
Sulfate (as SO3)
0.0001% max.
0.0003% max.
0.0012% max.
0.0001% max.
Disodium Octaborate Tetrahydrate (21%)
Formula
Boron
B2O3
Na2O
Purity
Na2B8O13.4H2O
20.5 % min.
67.5% min.
17.0% max.
99.5% min.
Impurities
Arsenic
Lead
Iron (as Fe2O3)
Sulfate (as SO3)
0.0001% max.
0.0003% max.
0.0012% max.
0.0001% max.