Caustic soda l is a white crystal of strong corrosivity at normal temperatures. Caustic soda can dissolve in water easily, its water solution is alkali and it can make phenolphthalein red.
Sodium hydroxide is one of the most popular alkalis, and it is essential medicines in chemical laboratory.
Its solution can be used for washing liquid.
1.Standard of identity of caustic soda flakes
Item
|
Mercury process
|
Diaphragm Process
|
NaOH
|
99.0% Min
|
96.0% Min
|
Na2CO3
|
0.5% Max
|
1.2% Max
|
NaCl
|
0.03% Max
|
2.5% Max
|
Fe2O3
|
0.005% Max
|
0.008% Max
|
2.Standard of identity of caustic soda granular
Item
|
Super
|
NaOH
|
99.0% Min
|
Na2CO3
|
0.5% Max
|
NaCl
|
0.03% Max
|
Fe2O3
|
0.005% Max
|
Application:
It is used for making chemicals, the paper, soap and detergent, artificial silk and cellophane, make and oxidize aluminium, use for the silky luster of mercerized cotton fabrics of the fabrics and deal with bauxite of processing. Used for removing hydrogen sulfide and sulphide of the sulphur alcohol in the petroleum industry of refining. Use for food processing (peel the vegetables and fruit) and refined vegetable oil. Can replace some soda ash and make glass. Process regenerated glue, acid waste water treatment and overcast ion exchange resin regeneration ,etc.
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