Anhydrous



with all water removed, especially water of crystallization.
Historical Examples

Above this temperature the anhydrous salt is the stable solid phase.
The Phase Rule and Its Applications Alexander Findlay

When perfectly pure and anhydrous, it forms a white and highly crystalline mass, rapidly decomposed by air and moisture.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

By careful 188 heating it may be made to yield the anhydrous salt.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 2 Various

A salt hydrate on being heated dissociates into a lower hydrate (or anhydrous salt) and water vapour.
The Phase Rule and Its Applications Alexander Findlay

The characteristic rock is a black vitreous trachyte resembling pitchstone, but anhydrous.
The Andes and the Amazon James Orton

The numbers denote grams of sodium sulphate, calculated as anhydrous salt, dissolved by 100 grams of water.
The Phase Rule and Its Applications Alexander Findlay

By dissolving it in concentrated sulphuric acid and warming the solution, the anhydrous salt is obtained.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 Various

Similarly, the solubility curve of anhydrous sodium sulphate has been followed to temperatures below 32.5.
The Phase Rule and Its Applications Alexander Findlay

Louyet has shown that the liquid acid, obtained as above, is not (as once believed) anhydrous.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

If the double salt is anhydrous, the point S lies at infinity, and the lines ef and gh are parallel to each other.
The Phase Rule and Its Applications Alexander Findlay

adjective
containing no water, esp no water of crystallization
adj.

“containing no water,” 1819, a modern coinage from Greek an-, privative prefix (see an- (1)), + hydor “water” (see water (n.1)). Greek did have anhydros “waterless,” used of arid lands or corpses that had not been given proper funeral rites.

anhydrous an·hy·drous (ān-hī’drəs)
adj.
Without water, especially water of crystallization.
anhydrous
(ān-hī’drəs)
Not containing water, especially water of crystallization.

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