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Searching the CAS Registry Number Field

A CAS Registry Number® is a unique numeric identifier assigned to a chemical substance in the CAS Registry database.

Enter one or more numbers connected with Boolean operators (AND, OR, NOT). Enter complete numbers or partial numbers using wildcards (* $ ?).

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CAS Registry Search Examples

• 14797-55-8 searches for nitrate.

• 9027-23-0 searches for ribulose-biphosphate carboxylase.

• 10102-43-9 searches for nitric oxide.

• 458-37-7 AND 10102-43-9 searches for nitric oxide and curcumin where both are present.

• 458-37-7 OR 10102-43-9 searches for records containing either or both numbers

• 458-37-7 NOT 10102-43-9 searches for records that contain 458-37-7 but not 10102-43-9.

• 458* searches for records that begin with the number 458 such as 458-24-2 and 458-37-7.

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Did You Know ...

In CABI, a Registry Number is automatically assigned to this field if the record has been indexed with a chemical term from the Descriptors field, which has an associated Registry Number.