Current bulk chemical prices are very hard to locate. Many of the price lists are designed for industry access and not specifically academic usage. Below are some suggestions on approaches to get a chemical price or at least an "estimate" that you can document in your projects.
Students, please confirm with you faculty member on if they will provide you prices, if you can use an estimate, or if you can use older data as long as the source is documented.
Several databases may contain chemical or material prices.
You are searching for the name of the chemical in various articles, newspaper, and government resources. Search for the name of the chemical AND add in other terms that limit the results for you. You may try "price", "market", "commodity", or other related terms to narrow the results.
Several journals may contain chemical or industry profiles, including chemical prices.
KSL has provided a series of books that offer price estimate data or methods of calculating price estimates for a variety of purposes, such construction, mechanical, electrical, etc.
R. S. Means provides man of these types of guides and can be viewed in the catalog. Author search for "R.S. Means Company" finds all of them.