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caustic soda in paper making
caustic soda in paper making

caustic soda in paper making

Product Attributes :

Description: caustic soda in paper making

Appearance: flakes, pearls; white


CAS No.: 1310-73-2

H.S. code: 281511

EINECS No.: 209-553-4

PACKAGE :25kg bag;1.0tons or 1.1tons jumbo bag for flakes; 1.0 or 1.2 tons for pearls; customized package.

caustic soda in paper making

1. Properties

Caustic soda is a strong corrosive alkali, generally in the form of flakes and pearls, easily soluble in water (exothermic when dissolved in water) and forms

Alkaline solution, otherwise deliquescence, easy to absorb water vapor (deliquescence) and carbon dioxide (deterioration) in the air.

2. Specifications:

Industrial grade GB209-2006


Flake 96%

Flake 98%

Flake 99%


96% Min.

98% Min.

99% Min.


1% Max.

0.8% Max.

0.5% Max.


2% Max.

0.05% Max.

0.03% Max.


0.01% Max.

0.008% Max.

0.001% Max








Caustic soda in paper making: 

Caustic soda plays a vital role in the paper industry. Caustic soda is a strongly alkaline compound whose main component is sodium hydroxide (NaOH). It is used to deink and bleach wood pulp or waste paper during paper production.

Specifically, caustic soda can ionize impurities in wood pulp and waste paper, pigments, and lysine on the surface of cellulose, making it easier to separate from water. In this way, the purpose of deinking and bleaching can be achieved. At the same time, caustic soda can also soften cellulose, which is beneficial to the dispersion and suspension of cellulose, thereby improving the quality of paper.

In addition, caustic soda can also adjust the pH value in the papermaking process to ensure the smooth progress of the whole process. Therefore, caustic soda plays an irreplaceable role in the paper industry.

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