69精品久久久久久久精品a片,人人妻人人澡人人爽人人精品,少妇荡乳情欲办公室456视频,国产精久久一区二区三区

Potassium Tetraborate

Potassium tetraborate, also known as potassium tetraborate tetrahydrate, is a white crystalline substance. Dissolved in water, slightly soluble in alcohol. The aqueous solution is alkaline. Potassium tetraborate is commonly used in the manufacture of disinfectants, can be used as a casein solvent and anti-wear additive, and can also be used as a component of welding flux and diazo developing solut