The Chemical Alternative Assessment (CAA) is the process of identifying concerned chemical substances and selecting their safe alternatives. To advance towards sustainable green chemistry and establish a "safe and sustainable chemistry environment", the Chemicals Administration, Ministry of Environment has employed technological and strategic approaches to explore safe alternatives for chemical substances.

1.S²AS（Safer Alternative Screening System - Green & Safer Alternatives Navigator。）

Based on the principles of green chemistry, the Administration will: establish operating procedures for searching, assessing, and screening safe alternatives for high-risk chemical substances; complete the establishment of a framework for a systematic database; utilize technology such as artificial intelligence and deep learning to quantify risk characteristics; integrate databases and data from documents; adhere to the hazard and risk assessment principles outlined in GreenScreen; establish operations for hazard assessment and scoring, and; develop criteria for risk level assessment. In the future, this will serve business entities in selecting chemical substances and safe alternatives for chemical substances.