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castic soda |Chlorpars Co


castic soda |Chlorpars Co ,


Caustic soda

Caustic soda (excluding solutions containing not more than 5% caustic soda) is designated as a deleterious substance under Japanese laws, and is a strongly corrosive substance. Persons who handle caustic soda should learn about related laws and regulations (such as the Poisonous and

Deleterious Substance Control Law), its properties, and precautions on handling; and should observe them to ensure safety.

This leaflet compiles the information that dealers, transporters, and consumers handling caustic soda need to know as a guideline for the routine prevention of accidents.

I. Information about Caustic Soda

1. Commercial Caustic Soda

􀉾Commercial caustic soda is classified into solid types and liquid types according to its phases as well as into industrial, reagent, and Japanese

Pharmacopoeia grades according to its uses. Of the solid types of commercial caustic soda, flaked caustic soda is also a commercial product.

􀉾The types of solid caustic soda are as shown in the following table, and the qualities and testing methods are specified in JSIA (Japan Soda Industry

Association) Standards, JIS (Japanese Industrial Standards), the Japanese

Pharmacopoeia and the JSFA (Japanese Standards for Food Additives).

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.

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