The web version of the Handbook of Chemistry and Physics contains all of the documents and tables present in the printed edition in a fully searchable and interactive web application.
The Handbook web application is divided into two main modules:
 Document 
 Mode - Search and browse the Handbook documents and tables. 
  View interactive tables 
 and generate graphs, export table data, etc.
 Chemistry 
 Mode - All chemical compounds and their associated physical 
 properties from the >700 document tables in the Handbook collated into 
 a single searchable database.  Search 
 for a compound by name, formula, property or structure, view all available 
 physical properties, its structure etc. in a chemical 
 entry and export data.
The Handbook is built using a responsive layout. This means that the position of menus and layout of tables will change depending on the screen size of the device you are using.
About the help documentation: