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
(AND, OR, NOT). Enter complete numbers or partial numbers using
wildcards (* $ ?).
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.
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.