Since the beginning of our collaboration in the early 1980s, CIL and Cerilliant have dedicated their programs to providing the highest quality environmental standards available anywhere in the world. Each standard provided by CIL and Cerilliant passes the most extensive series of tests, checks, and analyses designed to guarantee chemical and isomeric purity, identity, isotope enrichment and absolute concentration. A complete certificate of analysis and technical data package accompanies every standard product.