Finding prices for bulk chemicals has always been a challenge. Prices for bulk chemicals (e.g., 1 metric ton) are significantly different from finding laboratory chemical prices (i.e., one cannot just multiply 1 kg price found in a catalog by 1,000 and obtain a realistic price for a metric ton). In many cases, you may not be able to find a bulk chemical price for the chemical you want. With that said, there are a few places to search for bulk chemical pricing.
Current bulk chemical prices can be estimated by adjusting older chemical prices to current levels using a Producer Price Index (PPI). The Federal Reserve Bank of St. Louis lists a number of Producer Price Indices for Chemicals and Allied Products.
Updated Price = Older Price x [(Cost Index at Newer Date) / (Cost Index at Older Date)]