In fact, it is a purified substance of naphthalene. According to the purity of naphthalene, it can be divided into industrial naphthalene and refined naphthalene. The purity of industrial naphthalene is relatively low, generally around 96%. When industrial naphthalene is further purified to obtain naphthalene products containing over 98.45% naphthalene and with a crystallization point not less than 79.3C, we call it refined naphthalene. So can refined naphthalene only be used to make camphor balls? Let's give a brief introduction.
Refined naphthalene is a white and easily volatile crystal, which is an important polycyclic aromatic hydrocarbon in industry. Therefore, it also has aromatic properties and a mild and non irritating aromatic odor. On the contrary, the crude naphthalene separated from coal tar has a foul smell of coal tar. Refined naphthalene is insoluble in water, but it is easily soluble in some organic solvents, such as anhydrous ethanol, ether, benzene, etc. The stability of refined naphthalene is also relatively stable, with a melting point of 80.1 ℃ and a boiling point of 217.9C. These physical and chemical properties make its use relatively broad.
Refined naphthalene is mainly used as an intermediate in the production of dyes, especially in the production of camphor balls. Of course, in addition to making camphor balls, it is also an important raw material for leather production. It can also be used as a wood protectant, etc. Refined naphthalene is also often used in the pharmaceutical field, such as in the production of 1-naphthol, 2-naphthol, and methylnaphthylamine. So, as we mentioned earlier, can refined naphthalene only be used to make camphor balls? The answer is no.
Of course, many uses of refined naphthalene still need to be developed. Because refined naphthalene is extracted from petroleum and belongs to the low toxicity category, we should also pay attention to respiratory protection and wear filtered gas masks when using refined naphthalene.