Reagent

The pharmacist ordered a specific reagent for a prescription.

The dentist used a reagent to detect any cavities in the patient's teeth.

The chemist synthesized a reagent to help identify the presence of a particular compound.

The doctor prescribed a reagent to diagnose the patient's urinary tract infection.

The textile chemist used a reagent to test the colorfastness of the fabric.

The environmentalist used a reagent to measure the pH level of the water in the lake.

The scientist used a reagent to measure the pH level of the solution.

The laboratory technician carefully measured the reagent before adding it to the sample.