Oleum Calcotharinum

Salts solvents and liquid preparations · A Chymical Dictionary

At a Glance

The word. A vitriol oil distinguished by its red colour.

In the book. Colcothar is calcined vitriol or the residue of oil of vitriol; Sal Calcotharinum is a salt made from Colcothar.

A place to read. The historical definition below, 1650 dictionary, unnumbered definition page 36; facsimile PDF page 364.

Historical Definition

Oleum Calcotharinum is red oil of vitriol.

Meaning

The material-name and colour provide the equivalent. The definition does not state a procedure, a source of vitriol or the composition of the resulting oil.

Use in the Book

Colcothar is calcined vitriol or the residue of oil of vitriol; Sal Calcotharinum is a salt made from Colcothar. These related names should be followed through their particular products—oil, residue and salt—rather than treated as interchangeable merely because their forms resemble one another.

Places to Read

Colcothar. Vitriol named through calcination or through the residue of its oil.

Sal Calcotharinum. A salt derived from vitriolic colcothar.

Historical source: 1650 dictionary, unnumbered definition page 36; facsimile PDF page 364 — Facsimile

Sources. A Chymical Dictionary 1650, 1650 dictionary, facsimile PDF page 364, Oleum Calcotharinum

See also. Colcothar; Sal Calcotharinum