Stains for developing TLC plates
Useful tips and tricks for organic synthesis: MedChem Tips and Tricks
Synthetic procedures for common organic reactions: commonorganicchemistry.com/index.htm
Experimental procedures explained: http://learningcentre.usyd.edu.au/wrise/chemistry/procedure/proc_sequence.html
Chemistry Reference resolver chemsearch.kovsky.net/
Periodic table www.rsc.org/periodic-table/
Activation of MnO2: Manganese Dioxide - Activation of Manganese Dioxide by Azeotropic Removal of Water