Borax

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