The next toxic hydrocarbon-derivative family is the amines. Amines are toxic irritants, in addition to being flammable. They are considered slightly polar when compared to nonpolar materials. The amine functional group is represented by a single nitrogen surrounded by two or fewer hydrogen atoms. The general formulas for the amines are 〖"R-NH" 〗_2, "R" _2 "NH" , and "R" _3 "N". is the nitrogen that identifies the amine, not the number of hydrogen atoms attached to the nitrogen. The amines are covered in detail in from “Hydrocarbon derivatives” section in Chapter 5. The degree of toxins varies from compound to compound. Many of them are strong irritants. TLV values in the low double digits from 5 to 10 ppm in air. Lt is important to obtain further information when dealing with amines. Look the materials up in reference books and MSDSs to determine the toxic characteristics of a given amine compound.