Oil companies decide which substance to use to meet the law's requirements.

Question seven, which substance used to be known as Brimstone?

"Colour is his very medium, whatever the substance he uses."

Well, let's suppose for a moment that you want to separate two liquid substances using distillation process.

Cetus makes large quantities of the substance using genetic engineering.

A sticky substance used by batters to improve their grip on the bat.

Therapeutic medications are approved substances used to maintain the health and welfare of horses.

Cleaning agent, a substance used to remove dirt, stains, etc.

I don't know what substance to use.

The syrup she took to be laudanum, a common and equally addictive substance used by prostitutes on the way down.