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Webster 1913 Edition

Hydrofluoric

Hyˊdro-flu-or′ic

,
Adj.
[
Hydro-
, 2 +
fluoric
.]
(Chem.)
Pertaining to, or containing, hydrogen and fluorine; fluohydric;
as,
hydrofluoric
acid
.
Hydrofluoric acid
(Chem.)
,
a colorless, mobile, volatile liquid,
HF
, very corrosive in its action, and having a strong, pungent, suffocating odor. It is produced by the action of sulphuric acid on fluorite, and is usually collected as a solution in water. It attacks all silicates, as glass or porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc, or gutta-percha.

Webster 1828 Edition

Hydrofluoric

HYDROFLUOR'IC

,
Adj.
[Gr. water.] Consisting of fluorin and hydrogen. The hydrofluoric acid is obtained by distilling a mixture of one part of the purest fluor spar in fine powder, with two of sulphuric acid.

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