[Concerning the article by A.I. Khalepo, A.I, Korbakova, I.V. Sanotskiĭ, I.P. Ulanova, "Hygienic aspects of the regulation of occupational chemicals"].

The authors suggest changing a definition "Maximal allowed concentration of chemical hazard in the air of workplace", that was previously included into the Russian State Standard. Moreover, they support to rename maximal single MACs into the average shift ones. For calculation of maximal single MACs, the authors suggest 3-5 times increase of the average shift ones. According to the authors, an idea is to legalize acceptable risk for the workers' health due to chemical hazards in concentrations equal to the MACs and, actually, to increase the former MACs 3-5 times. Those suggestions seem groundless and divergent with the principles of national hygiene, so are met with disagreement. Such radical changes in hygienic regulation should proceed after consultation with wide hygienic community, occupational pathologists and trade unions.