The aim of this article is to show the main aspects of quantitative structure activity relationship (QSAR) modeling for regulatory purposes. We try to answer the question; what makes QSAR models suitable for regulatory uses. The article focuses on directions in QSAR modeling in European Union (EU) and Russia. Difficulties in validation models have been discussed.

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The chemical risk assessment is essesntial part of new chemical legislation registration, evaluation, and authorization of chemicals (REACH). The article presents a review of chemical legislation policies in the European Union (EU) and in Russia, and changes in chemicals regulations to meet the requirement of REACH. The risk assessment paradigm, toxicological parameters, safe limits and classification criteria used by different agencies and authorities in different countries are reported. Our investigation also focuses on comparison of chemical risk assessment criteria used in OECD member countries and in Russia. Tendencies in harmonization in accordance with the globally harmonized system of classification and labeling of chemicals (GHS) are discussed.

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