Police said 20 people were affected by the spill. Plano officials told WFAA that a container filled with either muriatic or hydrochloric acid was leaking, and that employees called Plano Fire-Rescue.

Wear safety goggles and latex gloves to protect the eyes and hands from the strong acid and base used in this demonstration. Keep the containers of concentrated hydrochloric acid and aqueous ammonia ...

Muriatic acid, a diluted form of hydrochloric acid ... Fill a large plastic container with water and slowly add the acid. Make sure the drain is dry before pouring the acid to avoid reactions ...