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Tetrachloroethylene - CAS # 127-18-4. Information provided on Tetrachloroethylene (127-18-4) is for reference only and is subject to change. There is no warranty of accuracy or completeness of any information contained herein.
Chemical Abstract Service (CAS) Numbers Information The CAS Number is one of the fields of information in the Tier2 Submit software programâs Chemicals in Inventory module. It is a number assigned to a specific chemical or chemical compound when it becomes registered with the Chemical Abstract Service (CAS), a division of the American Chemical Society. The CAS Number is used in Tier Two reporting because it is: â¢ a unique numeric identifier, â¢ it designates only one substance, and â¢ it serves as a link to a wealth of information about a specific chemical substance. CAS Number Format: A CAS Registry Number is a numeric identifier that can contain up to 9 digits,