1.   Although the twins are chemically identical, each one is not the mirror image of the other.

2.   Avonex and Rebif are chemically identical.

3.   But an appeals court sided with the FDA, saying that the drugs do not have to be chemically identical, only identical in terms of their clinical effects.

4.   Crack, the cheaper, smokable form of cocaine is chemically nearly identical to the powder form, usually snorted.

5.   Forensic geologists have solved murder cases by tracing dirt found at a crime scene to a specific place where chemically identical components are found.

6.   Like many drugs, the vaccine existed in two versions, or isomers, chemically identical but with mirror-image molecular structures.

7.   Separating those forms of uranium from each other would be difficult, because they are chemically identical.

8.   Plavix is chemically almost identical to ticlopidine.

9.   But the shea nuts pose a threat to the cocoa market as the butter they produce is chemically almost identical to cocoa.