Abstract: A web based purchasing system and method for chemical purchases in industrial quantities. An exchange platform allows sellers to post chemicals for sale. Sellers may choose criteria defining the geographical area of sale for their goods, and the like. Purchasers seeking goods search the exchange for chemicals that they need, while being able to input various criteria associated with their purchase, such as quantity, purity, and the like. In an alternative example financial service that are desirable to facilitate a sale or transfer of chemicals is also provided on the exchange.