Amines are widely used, and the earliest development of the dye industry is based on aniline. Some amines are necessary for life-sustaining activities, but some are very harmful to health. Many amine compounds have carcinogenic effects, especially aromatic amines such as naphthylamine and benzidine. The following is a brief introduction of fatty amines and aromatic amines and their differences.
Fatty amines refer to a large group of organic amine compounds with carbon chain length ranging from C8 to C22. Like ordinary amines, it can be divided into four categories: primary amines, secondary amines, tertiary amines and polyamines, and primary amines, secondary amines and tertiary amines depend on the number of hydrogen atoms substituted by alkyl groups in the ammonia. Fatty amines are organic derivatives of ammonia. C8-10 short-chain aliphatic amines have a certain degree of solubility in water, while long-chain aliphatic amines are generally insoluble in water, liquid or solid at room temperature, and are alkaline. As an organic base, it can irritate and corrode the skin and mucous membranes.
Aromatic amines refer to amines with aromatic substituents, namely -NH2, -NH- or nitrogen-containing groups, connected to an aromatic hydrocarbon, which usually contains one or more benzene rings in its structure. Aniline is the simplest example of this compound. The reactivity of aromatic amine molecules is relatively high. Aromatic amines are usually liquids with high boiling points or solids with low melting points, with special odors and great toxicity. Aromatic amines are liquids with high boiling points or solids with low melting points. They have a special smell and are very toxic. For example, aniline may be inhaled, eaten, or absorbed through the skin to cause poisoning. If ingested in an amount of 0.25 ml, it will cause severe poisoning.
(1) As mentioned above, the physical and chemical properties are different.
(2) Different uses.
Fatty amines have the following functions: primary amines can be used as corrosion inhibitors, lubricants, mold release agents, oil additives, pigment processing additives, thickeners, waterproof additives, wax emulsions, etc.; it can also be used to produce cations and non ionic surfactants and amphoteric surfactants.
Aromatic amines are very toxic. Naphthylamine and benzidine are substances that cause malignant tumors. Generally, aromatic amines are used as intermediates in organic synthesis.