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The CAS Registry Number is similar to a telephone number and has no significance in terms of the chemical nature or hazards of the material. The CAS Registry Number can be used to locate additional information on the material, for example, when searching in books or chemical data bases.
What is CAS REGISTRY? CAS REGISTRYSM is the most authoritative collection of disclosed chemical substance information, containing more than 129 million organic and inorganic substances and 67 million sequences (view current numbers).