Acids and Alkalis

Many household items are either acids or alkalis and are not hazardous, for example; vinegar, soap, lemon juice, toothpaste.

Some acids and alkalis are stronger and must be handled with care. The strength of an acid or alkali is measured on the ph scale. Neutral chemicals are ph 7, those measuring less than 7 are acid, whilst those measuring more than 7 (up to 14) are alkaline.