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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.
Code Access Security (CAS) Definition - What does Code Access Security (CAS) mean? Code access security (CAS) is a security mechanism by which the common language runtime (CLR) of the .NET framework can restrict the managed code to execute operations with a limited set of permissions. CAS enforces security policies in the .NET framework by preventing unauthorized access to protected resources and operations.