Sodium hydroxide (NaOH), commonly known as the caustic soda, caustic soda, KeXingNa, for another name caustic soda and in Hong Kong and called elder brother, under normal temperature is a white crystal, has the strong corrosive. Soluble in water, its water solution is strongly alkaline, can make phenolphthalein red. Sodium hydroxide is a very common chemical laboratory, alkali is one of essential drugs. Its solution can be used as a final twist.
Molten white particles or strip, is often made into small flake. Easy to absorb moisture from the air and carbon dioxide. 1 g soluble in 0.9 ml cold water, 0.3 ml boiling water, 7.2 ml anhydrous alcohol, 4.2 ml methanol, soluble in glycerin. Soluble in water, alcohol or solution when mixed with acid produced intense heat. A strong alkali solution. The relative density of 2.13. Melting point 318 ℃. Boiling point 1390 ℃. Half of the lethal dose (mice, celiac 40 mg/kg). Corrosive.
storage
Sealing completely preserved. (namely can't open place. The air containing water vapor (H2O), carbon dioxide (CO2), and easy to be ChaoXie NaOH water vapor, easy and carbon dioxide reacts sodium carbonate (Na2CO3), also can go bad)
use
Widely applied to the sewage agents, basic analysis reagent preparation, analysis with standard lye, a small amount of carbon dioxide and water absorption agent, acid and sodium salt manufacturing. The manufacture of other containing hydroxyl ions reagents; In papermaking, printing, dyeing, wastewater treatment, electroplating, chemical engineering drilling were important USES; Domestic brands are: day we brand, brand, gold of exploitation of CARDS.
Molten white particles or strip, is often made into small flake. Easy to absorb moisture from the air and carbon dioxide. 1 g soluble in 0.9 ml cold water, 0.3 ml boiling water, 7.2 ml anhydrous alcohol, 4.2 ml methanol, soluble in glycerin. Soluble in water, alcohol or solution when mixed with acid produced intense heat. A strong alkali solution. The relative density of 2.13. Melting point 318 ℃. Boiling point 1390 ℃. Half of the lethal dose (mice, celiac 40 mg/kg). Corrosive.
storage
Sealing completely preserved. (namely can't open place. The air containing water vapor (H2O), carbon dioxide (CO2), and easy to be ChaoXie NaOH water vapor, easy and carbon dioxide reacts sodium carbonate (Na2CO3), also can go bad)
use
Widely applied to the sewage agents, basic analysis reagent preparation, analysis with standard lye, a small amount of carbon dioxide and water absorption agent, acid and sodium salt manufacturing. The manufacture of other containing hydroxyl ions reagents; In papermaking, printing, dyeing, wastewater treatment, electroplating, chemical engineering drilling were important USES; Domestic brands are: day we brand, brand, gold of exploitation of CARDS.