Caustic Soda Flake

Caustic Soda Flake Specification

NaOH	98% Min
Na2C03	1% Max
Cell 4	Cell 5
Hg	Nil Nil
Na2s04	2 ppm Max
Ni: Fe	5 ppm Max
NaCI	100 ppm Max
Si02	100 ppm Max
NaCI03	15 ppm Max

Certificate of Analysis
CAS No: 1310-73-2
EC No: 215-185-5

Product Description:

Caustic Soda (Sodium Hydroxide) flakes are in white color, hygroscopic, soluble in water, obtained by evaporating of liquid Caustic Soda which is produced with Membrane te chnology.

Properties of Caustic Soda

Molecular formula	NaOH
Molecular weight	40.00
Specific gravity	1.48 (45% concentration) 1.50 (50% concentration)
Melting point	9 C (45% concentration
Boiling point	136~ 137 C (45% concentration)
Vapor pressure	3.24 mmHg (20 C, 45% concentration) : NaOH
Molecular weight	40.00
Specific gravity	1.48 (45% concentration) 1.50 (50% concentration)
Melting point	9 C (45% concentration)
Boiling point	136~ 137 C (45% concentration)
Vapor pressure	3.24 mmHg (20 C, 45% concentration)

General Characteristics of Caustic Soda

Caustic soda is the most typical of the strong alkalis. Although there is no dan-
ger of it exploding or igniting, it reacts with various acids, such as hydrochloric
acid, and is neutralized and generates considerable exothermic heat of neutral-
ization.
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 mate-
rials 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

General Precautions

Install a facility that can discharge large quantities of water to flush away any
accidentally leaked or spilt caustic soda.
Although caustic soda must be handled with care so as not to leak, in case of
leakage follow the procedures in Section VI Action to be Taken in Case of
Leakage.
When solid caustic soda is being taken out of a drum, cut the seam of the
drum. Since solid caustic soda taken from a drum quickly absorbs moisture
from the atmosphere and becomes slipper y, take great care not to slip on it.
In the case of liquid caustic soda, carefully remove the cap of the drum while
standing it in the upright position, and connect a nipple pipe. Lay the drum
down with its air purging valve facing upward and loosen the valve to introduce
air into the drum, then open the valve to take out the liquid.

Effects of Caustic Soda on the Human Body

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 particu- lar, if the eyes are exposed to an alkali, since eye tissue is rapidly affected caus- ing a lo wering 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 decom- poses. 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/m’ (upper limit)

Caustic Soda Flake