Chem Service Inc., established in 1962, is the largest independent supplier, providing companies and educational institutions of analytical reference materials and the original source of small quantities of organic chemicals. Chem Service provides companies and educational institutions with certified analytical reference standards and chemicals in small quantities to these labs worldwide.Chem Service, Inc. produces high purity chemicals for use as reference materials and for other laboratory purposes. More than 95% of our Standards Grade materials have a certified purity of 98.0% or greater and do not require purity corrections when preparing solutions for use with EPA, USTM, UST, and numerous other international methods.