Most types of rosins may be purchased online from ChemicalStore.com. For orders of more than 500 Lbs (or 250 kg) use the following:
Rosin Factory (Division of Chemical Store Inc.)
1059 Main Avenue
Clifton, NJ 07011
Tel: (973) 405-6249
Other rosin wholesalers may contact New Jersey Industrial Research Center, Inc. at (973)405-6249 and request a listing in this page.