Sodium-Hydroxide0.jpg Sodium-Hydroxide0.jpg

Russian granules profit

CAS Registry Number (CASRN):

1310-73-2 ,

name:

Russian granules profit ,

formula:

NaHO ,

CAS Registry Number (CASRN):

1310-73-2 ,

SAX Number:

55X04QC32I ,

Molar mass (g/mol):

39.9971 ,

Density (g/cm3):

2.13 ,

Melting point (°C):

۳۱۸ ,

Boiling point (°C):

‎1388 ,

Acidity (pKa):

13 ,

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Caustic Soda

General Characteristics of Caustic Soda

􀉾Caustic soda is the most typical of the strong alkalis. Although there is no danger of it exploding or igniting, it reacts with various acids, such as hydrochloric acid, and is neutralized and generates considerable exothermic heat of neutralization.

􀉾It corrodes metals, such as aluminum, tin, and zinc. During this process, it generates hydrogen, which has the potential to behave as an explosive gas.

􀉾It is highly hygroscopic, and absorbs the moisture, carbon dioxide, or sulfur dioxide in the air. It is also highly deliquescent and absorbs moisture to form an aqueous solution.

􀉾When liquid caustic soda is diluted, it generates a considerable amount of heat of dilution. Since this rapidly generates strong heat and the resulting solution may spatter if the water is carelessly poured into it, care must be taken.

􀉾Caustic soda easily decomposes animal fibers. Although plant fibers are also decomposed, they have a higher resistance than animal fibers. Although materials resistant to corrosion by caustic soda include stainless steel, steel-epoxy resins, and fiber-reinforced plastics, steel and rubber-lined steel are the most frequently used.

2. Effects of Caustic Soda on the Human Body

Alkalis have a decomposing effect on proteins, which may gradually penetrate the deep tissues unless the adhered alkali is completely removed. In particular, if the eyes are exposed to an alkali, since eye tissue is rapidly affected causing a lowering or loss of vision, great care should be taken.

Even a dilute solution can affect the tissue of the skin if it repeatedly comes into contact with the skin, which may cause dermatitis or chronic eczema.

If the concentration of the solution is high, the affected tissue rapidly decomposes.

If the solution is swallowed by mistake, it causes inflammation in the mouth,

throat, esophagus, or stomach.

The inhalation of caustic soda dust or mist causes various degrees of injury in the respiratory tract. Thus, the allowable concentration of caustic soda dust or mist in the air in a working area is specified as 2 mg/m3 (upper limit).

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