Patsnap (Patents) 
Patsnap provides access to over 50 million patents from across the world including USA, Europe, WIPO, China, Korea, Japan and Norway. Patsnap only allows 3 concurrent users. Users may register for accounts using the “User registration for customers” button.

Authoritative source for identifying a chemical substance and its related chemical structures, chemical names, regulatory information, and properties, including CAS Registry Numbers®, reaction schemes, step-by-step experimental procedures, detailed conditions, and product yields. 
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Singapore Standards
Recognised documents established by consensus. Standards are published documents setting out specifications and procedures for the design, use or performance of materials, products, processes, services and systems.