This customisable document offers information on the hazards associated with chemicals commonly used in D&T departments, and can also be used as a stocklist.
CLEAPSS strongly recommends that any D&T teacher or technician with limited or no experience of  these chemicals should consult with their science colleagues.

The removal of scale from hard water from sinks, taps, toilet bowls, washbasins, baths, kettles and steam irons. All use some form of acid as the active ingredient.

Etching zinc or copper plates for intaglio printing using dilute nitric acid.

The corrosion resistance of iron and steel can be improved by treatment with sulfuric and phosphoric acids. Other metals are also affected through the introduction of chemicals.