The pyrimidine derivatives 4-methyl-5-phenylpyrimidineand 4-benzylpyrimidine are chemical modifications of pyrimidine. These substances occur as amphetamine synthesis impurities. Other pyrimidine derivatives play a role as antibiotics and in other drugs.
Nothing is known about the effect of these substances.
Nothing is known about the risks associated with the consumption of 4-methyl-5-phenylpyrimidine and 4-benzylpyrimidine. However, the substances may exhibit acute or long-term toxic effects.
Each synthesis impurity represents an unknown health risk: the properties hazardous to health have never been scientifically studied and are therefore difficult to estimate. The more different synthesis impurities are contained in a sample, the greater the probability that an impurity with a high adverse health effect is among them. Even a small amount of such an impurity can be harmful. In addition, synthetic impurities are an indication of improper manufacturing/purification. It is also important to add that regular use of amphetamine with synthetic impurities poses a higher health risk than one-time use.