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1.1 This guide covers sustainability factors for product manufacturers to consider when comparing alternative chemicals or ingredients across the life cycle of a product. Such an analysis could be used in product development, answering customer inquiries, or replying to regulatory requests, among others.

1.2 This guide integrates many of the principles of green chemistry and green engineering in evaluating the factors across the social (including human health), economic, and ecological attributes in the use of a particular material and potential alternatives in a particular product.

1.3 This guide provides an outline for the contents of a report of the results of the analysis, including an executive summary, detailed report, and retrospective.

1.4 This guide does not provide guidance on how to perform chemical risk assessment, alternatives assessment, life-cycle assessment, or economic analysis, or how the alternatives decision-making framework will be completed.

1.5 This guide does not suggest in what order the social, ecological, or economic attributes of sustainability should be evaluated or which one is most important. This is a decision of the company performing the decision-making evaluation.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

4.1 This guide outlines sustainability factors for manufacturers to consider when comparing alternative chemicals or ingredients across the life cycle of a product.

4.2 Methods exist for the evaluation of chemical hazards for product-chemical pairs. These methods are referenced in several regulatory, non-regulatory, and green building schemes and should be conducted as part of an analysis of this type.

4.3 Similarly, many tools exist for measuring economic viability, such as value-models and cost analysis. There are also many tools and techniques for measuring social acceptance of products such as sales trends, voice of the customer and many other types of surveys.

4.4 This guide acknowledges the need for determining a baseline for comparing the performance (environmental, economic, and social) of an existing product-chemical pair in a product with the possible/potential alternatives. As such, when using this guide, companies shall use the same study boundaries for the original baseline case and for all alternative options under assessment. Further, when feasible, the same assessment tools should also be used for all options being analyzed.

4.5 Sustainability is a very holistic and encompassing concept. As such, many factors cross all three attributes of sustainability. While factors may be assigned one way in this guide, it is recognized the user has discretion to assign them to whatever attribute(s) they deem appropriate when performing this analysis. However, the user should consistently categorize among all analyses for the purpose of easy comparison.

4.6 This guide is structured such that the impacts of each life cycle stage (that is, raw material acquisition, raw material transport, manufacturing, use, and end of life) are considered in their entirety for each attribute of sustainability (that is, social, economic, and ecological). Users of this guide also may wish to take an alternative approach by considering the impacts associated with all three attributes of sustainability (for example, social, economic, and ecological) for each life cycle stage before moving on to the next life cycle stage. This alternate approach may provide a different perspective regarding identifying areas of high impact within each life cycle stage.