His work in Cardiff focused particularly on the action of phenoxyacetic acid, a herbicide.

It is formed by the action of chromic acid on ammonium hydroxide with subsequent crystallisation.

Superphosphate is a fertilizer produced by the action of concentrated sulphuric acid on powdered phosphate rock.

Triple superphosphate is a fertilizer produced by the action of concentrated phosphoric acid on ground phosphate rock.

It is made in great quantities in the soda process, by the action of sulphuric acid on common salt.

It is produced by the action of sulphuric acid on fluorite, and is usually collected as a solution in water.

It is generally accepted that this is achieved through the action of lactic acid primarily .

Menthol is easily dehydrated to give mainly 3-menthene, by the action of 2% sulfuric acid.

It can be prepared by the action of hydroiodic acid on ammonia.

When combined with rifampicin, the action of fusidic acid is additive or synergistic.