Catalyzes the stoichiometric dehydration of Z-phenylacetaldoxime to phenylacetonitrile. Prefers the Z-form of phenylacetaldoxime over its E-isomer. (Z)-phenylacetaldehyde oxime = H2O + phenylacetonitrile Optimum pH is 7.0. Optimum temperature is 30 degrees Celsius. Monomer.