Where are good sources for medium quantities (10-1000kg) of chemicals, particularly salts?
For quantities <10kg, I know of lots of options from lab suppliers (Sigma Aldrich, Alfa Aesar, etc). These companies generally charge a premium for quality that make bulk purchases unreasonably expensive.
For quantities >1000kg, I know of industrial sources (Univar, BASF, etc) and it seems they have local resellers in most markets. These companies typically have minimum orders of $1000 or so.
I am in the US.
What keywords should I be searching to find a local or online vendor of in between quantities?