Chiron has been an expert in reference materials for over 30 years and we are still leading in this field. We offer a varied, flexible and innovative range of over 10 000 reference materials, specifically designed and developed to suit the needs of individual customers. Reference materials can be for anything from complex “molecular fossils” derived from once-living organisms, to markers of disease or exposure to chemicals. Chiron is well-known for reference materials which are applied in petroleum exploration and oil spill analysis, a large range of alkylated polyaromatic compounds and PAH metabolites, pollutants found in food and the environment, and for the introduction of many new carbon 13-labelled drug standards.