castile soap
Noun
Meaning
A kind of fine, hard, white or mottled soap, made with olive oil and soda; also, a soap made in imitation of the above-described soap.
Source: Webster's dictionarySynonyms
Hypernyms
Examples
Castile soap is a popular example of the vegetable-only soaps derived from the oldest “white soap” of Italy.
For an all-purpose—and pleasantly aromatic—household disinfectant, add essential oils to a mixture of water, castile soap, and hydrogen peroxide.
The ideal soap is a liquid soap, such as castile soap, like Dr. Bronner’s, liquid hand soap, or liquid dishwashing soap, such as Dawn.
It’s safe and preferable, Bronner says, to use Castile soap and vinegar in sequence: Clean with Castile soap and follow that with a vinegar rinse to remove any soap film.
Despite many recipes on the internet that claim otherwise, castile soap should never be mixed with an acid like vinegar or lemon juice because the soap is a base and vinegar and lemon juice are acids that will reduce the soap into useless oils.