An 18th century chemical symbol for soap.
Although fatty acids are a key ingredient in soap, a distinction can be made between "soft soap", where those acids are combined with potassium, and just "soap", which includes sodium in its composition.
Symmetric, Closed shape, Monochrome, Contains both straight and curved lines, Has crossing lines.
Category: Alchemical Symbols.
More symbols in Alchemical Symbols:
Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century. Note that while notation like this was mostly standardized, sty… read more »
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"Soap (alternate)." Symbols.com. STANDS4 LLC, 2018. Web. 20 Jun 2018. <https://www.symbols.com/symbol/soap-%28alternate%29>.