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Properties: colorless transparent crystals or white crystalline powder. Odourless, taste salty. Specific gravity 1.73. 380 ℃ when losing all the water of crystallization.
Boiling point: 1575 ℃ Melting point: 880 ℃. Soluble in water, glycerin, slightly soluble in alcohol. In weak alkaline solution. Borax is in the air can be slowly weathering. When molten into colorless vitreous material.