Borax

Wintersun code:02-010

Borax 5 mol

WCode: 02-010-1
CAS No.: 12179-04-3
Molecular Formula: Na2B4O7.5H2O
Formula Weight: 291.35

Sales Specification

Appearance: White, granular, crystalline solid
Grades: Technical Standard
Pentahydrate Borax (Na2B4O7.5H2O): 101.5%-103.5%
Anhydrous Borax (Na2B4O7): 70.8%-71.5%
Boric Oxide (B2O3): 48.5%-49.5%
Sodium Oxide (Na2O): 21.6%-22.0%
Water of Crystallization (H2O): 28.5%-29.9%
Chloride (Cl): 600ppm
Sulfate (Na2SO4): 300ppm
Iron (Fe): 15ppm

pH in Water at 20°C(68°F):

Weight 0.1%: pH 9.25
Weight 0.5%: pH 9.24
Weight 1.0%: pH 9.24
Weight 2.0%: pH 9.25
Weight 3.0%: pH 9.29
Weight 3.74%(Saturation): pH 9.30

Physical and Chemical Properties

Specific Gravity 25°C: 1.815
Specific Heat 25°C: 96.3 cal/deg-mol
Heat of Solution (Absorbed) 25°C: -13.03 Kcal/g-mol or -51.71 Btu
Heat of Formation: -1147.8 Kcal/g-mol or -4555.0 Btu

Packing

In 25KG bags; 42bags/pallet

Borax 10 mol

WCode: 02-010-2
CAS No.: 1303-96-4
Molecular Formula: Na2B4O7.10H2O
Molecular Weight: 381.37

Sales Specification

Appearance: White, granular, crystalline solid
Grades: Technical Standard
Description: The surface of the crystal is usually chalk white as a result of partial loss of water of hydration.
Decahydrate Borax (Na2B4O7*10H2O): 100%min.
Anhydrous Borax (Na2B4O7): 52.8%min.
Boric Oxide (B2O3): 36.5%min.
Sodium Oxide (Na2O): 16.3%min.
Water of Crystallization (H2O): 47.2%max.
Chloride (Cl): 200ppm max.

pH in Water at 20°C(68°F):

Weight 0.1%: pH 9.24
Weight 0.5%: pH 9.23
Weight 1.0%: pH 9.23
Weight 2.0%: pH 9.24
Weight 3.0%: pH 9.27
Weight 4.78%(Saturation): pH 9.32

Physical and Chemical Properties

Specific Gravity 25°C: 1.73
Specific Heat 25°C: 147 cal/deg-mol
Heat of Solution (Absorbed) 18°C: -2.589Kcal/g-mol or -102.59 Btu
Heat of Formation: -1503.0 Kcal/g-mol or -5964.7 Btu

Packing

In 25kg bags; 42bags/pallet