You can perform searches by structure, by a portion of the structure (called a substructure), or by a reaction scheme in many of Penn's chemical science resources. Here are a few of the most comprehensive.
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Provides access to a comprehensive and reliable collection of scientific research information. A global network of scientists curate and aggregate the world’s scientific patent and journal content daily and make it fully discoverable. This ensures researchers have current and accurate substance, reaction, reference and commercial sourcing information available to quickly inform your critical research activities. SciFinder-n includes new predicted reaction steps in synthesis plans. These new predicted steps, produced by a CAS rules-based AI engine, will inspire new ideas for retrosynthetic routes to novel molecular entities.
Commercial availability can be tricky. It is generally most efficient to search an aggregate source that contains availability through multiple suppliers. Depending on the supplier, however, the aggregators may not include information like quantity or price. In a case like that, you will have to go to the individual suppliers' Web sites for the missing information.
Handbooks can be a quick method of finding physical properties, especially if you wish to find the same property for a number of different substances. Bear in mind that each handbook has two scopes: a scope of substances and a scope of properties, and that the two need to intersect for you to find the information you need. Not all properties covered are available for all substances!
Using DragonSearch, and using query (Chemical Properties) AND (Handbook* or Encyclopedia*) to find either print online books on chemical properties: