There are two kinds of mothballs on the market at present: natural mothballs and synthetic mothballs. Among them, natural camphor ball is an aromatic organic compound extracted from camphor tree branches and leaves, which is non-toxic, while synthetic camphor ball contains toxic substances such as naphthalene or p-dichlorobenzene. If they are put in too much, they will be harmful to human body. On the surface, it is difficult to tell whether mothballs are natural or harmless. It is suggested to put them in a healthy order, which is generally 10.

Natural mothballs are smooth, colorless or white crystals with fragrant smell, which will float in water. Natural mothballs, also known as smelly beads, are used to prevent insects, moths and mildew. They were originally aromatic organic compounds extracted from camphor tree branches and leaves. It is also used in pharmaceuticals, spices and so on. Used as a cardiotonic in medicine. Synthetic mothballs are organic compounds. Most camphor balls containing naphthalene are white, irritating and soaked in water. Pure camphor has better color and purity than naphthalene sanitary ball, and it will not leave yellow spots when sprinkled directly on the fabric. However, the resources of pure camphor are limited, and camphor is more used in medicine, plastics and perfume industries.