You know what it looks like… but what is it called?
TAKE THE QUIZGlauber's salt
noun
Glau·ber's salt
ˈglau̇-bər(z)-
: a colorless crystalline sulfate of sodium Na2SO4·10H2O used especially in dyeing, as a cathartic, and in solar energy systems
—sometimes used in plural
called also Glauber salt
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Merriam-Webster unabridged
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