Medicinal grade sodium hydroxide cas1310-73-2 use

Medicinal grade sodium hydroxide cas1310-73-2 use sodium hydroxide, chemical formula is NaOH, commonly known as caustic soda, fire alkali, caustic soda, is a strong alkali with strong corrosiveness, generally in the form of flakes or granules, easily soluble in water (dissolved in water when exothermic) and the formation of an alkaline solution, there is also deliquescence, easy to absorb water vapor in the air (declique) and carbon dioxide (metamorphosis).


NaOH is one of the chemicals in the chemical laboratory and one of
the most common chemicals.

The pure product is a colorless and transparent crystal
.

Density 2.
130 g/cm³
.

The melting point is 318.
4°C
.

Boiling point 1390 °C
.

Industrial products contain small amounts of sodium chloride and sodium carbonate, which are white opaque crystals
.

There are blocks, flakes, granules and rods, etc
.

Formula 40.
01 sodium hydroxide in water treatment can be used as an alkaline cleaning agent, soluble in ethanol and glycerin, insoluble in propanol, B at high temperature on carbon sodium also has a corrosive effect
.

It is disproportionated with halogens such as chlorine, bromine and iodine, and neutralizes with acids to form salt and water
.

【Content determination】Take 1.
5g of this product, weigh it precisely, add a new boiling and put cold water 40ml to dissolve, cool to room temperature, add 3 drops of phenolphthalein indicator solution, titrate with sulfuric acid titration solution (0.
5mol/L) until red disappears, record the volume of sulfuric acid titration solution, add 2 drops of methyl orange indicator solution, and continue to add sulfuric acid titration solution to show continuous orange-red
.

According to the volume of sulfuric acid titration solution consumed, the total base amount in the test supply amount (calculated as NaOH calculation) is calculated, and the content
of Na2CO3 in the test amount is calculated according to the volume of sulfuric acid titration solution consumed after the addition of methyl orange indicator solution.

Each 1 ml of sulfate titration solution (0.
5 mol/L) is equivalent to 40.
00 mg of NaOH or 106.
0 mg of Na2CO3
.

The total base content of this product is calculated by sodium hydroxide (NaOH), which should be 97.
0%~100.
5%; The total base content of sodium carbonate (Na2CO3) shall not exceed 2.
0%.


【Properties】This product is melted white dry particles, blocks, rods or flakes; Tough and crunchy
.

This product is easily soluble
in water.

【Identification】The identification reaction of sodium salt in the aqueous solution of this product (General 0301).