Basing of MACs for the certain derivatives of carboxylic acids in the air of working area with the help of mathematic patterns

Reports of MACs for carboxylic acid derivatives as sodium methoxyacetate (SMOA), methyl chloropropinate (MCP) and acetoacetic ether (AAE) were presented. SMOA showed low toxicity, no cumulation and specific action,#MCP demonstrated moderate toxicity, low cumulation no specific action in concentrations close to Limac. AAE presented toxicity low in oral usage and moderate when inhaled, low cumulation, no irradiation and sensitization. Tentative safe level of injury and MAC estimated for the afore-said substances together with toxicity parameters compared with the substances studied before allowed the authors to set the MAC of SMOA-10, MCP-2, AAE-10 mg/m3.