Patsnap (Patents) 
Patsnap provides access to over 50 million patents from across the world including USA, Europe, WIPO, China, Korea, Japan and Norway.

SciFindern
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. 
New users have register here first before logging in to SciFindern.

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.