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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.
North American (NA) Numbers are identical to UN numbers. If a material does not have a UN number, it may be assigned an NA number; these are usually 4-digit numbers starting with 8 or 9 such as 9037 (or ideally, NA9037), the NA number for hexachloroethane. UN/NA numbers are required for the shipment of hazardous materials.