There are many types of raw materials and they are widely used. There are as many as 5-7 million kinds of chemicals in the world, and more than 100,000 kinds are sold and circulated on the market, and more than 1,000 new chemicals come out every year, and 150-200 kinds of them are co
nsidered to be carcinogenic. Things.
Chemical raw materials can generally be divided into two categories: organic chemical raw materials and inorganic chemical raw materials.
