Hudson Technologies Inc. operates as a refrigerant services company in the United States and internationally. It sells reclaimed and virgin refrigerants, and industrial gases; provides refrigerant management services, such as reclamation of refrigerants and laboratory testing, as well as re-usable cylinder refurbishment and hydrostatic testing services. The company also offers RefrigerantSide services, including system decontamination to remove moisture, oils, and other contaminants, as well as refrigerant recovery and reclamation services; predictive and diagnostic services that are intended to predict potential problems in air conditioning and refrigeration systems under the Chiller Chemistry, Fluid Chemistry, and Chill Smart names; and SmartEnergy OPS service, a Web-based real time continuous monitoring service for measuring, modifying, and enhancing the efficiency of energy systems comprising air conditioning and refrigeration systems. In addition, it participates in the generation of carbon offset projects. The company serves commercial, industrial, and governmental customers, as well as refrigerant wholesalers, distributors, contractors, and refrigeration equipment manufacturers; and customers in petrochemical, pharmaceutical, industrial power, manufacturing, commercial facility and property management, and maritime industries. Hudson Technologies, Inc. was founded in 1991 and is headquartered in Pearl River, New York.