Vitriol, blue green

The vitriols, blue, green, and white, were especially important because it was from them that vitriolic acid was prepared. The natural vitriols, copper, iron, and zinc sulfates respectively, were so named presumably because of the glassy surfaces of their crystals (from the Latin vitreus like glass ). 

Also known as black iron oxide iron monoxide. fer as ak.sTd ferrous sulfate inorgchem FeS04-7H20 Blue-green, water-soluble, monoclinic crystals used as a mordant in dyeing wool, in the manufacture of ink, and as a disinfectant. Also known as copperas ferrisulphas green copperas green vitriol iron sulfate. fer as sal,fat ... 

Sulfates. Iron(II) sulfate heptahydrate [7782-63-0], FeS04TH O, forms blue-green monoclinic crystals that are very soluble in water and somewhat soluble in alcohols. It is known by many other names including cupperas, green vitriol, and iron vitriol. The compound is efflorescent in dry air. In moist air, the compound oxidizes to yellow-brown basic iron(III) sulfate. Aqueous solutions tend to oxidize. The rate of oxidation increases with an increase in pH, temperature, and light. The compound loses three waters of hydration to form iron(II) sulfate tetrahydrate [20908-72-0], FeS04 TH O, at... 

Vitriol A sulptvato of any of various roatals. as copper (blue vitriol) Iron (green vitriol) etc. 

Caswell No. 460 CCRIS 7331 ERA Pesticide Chemical Code 050502 Ferrous sulfate, heptahydrate Fesofbr Fesotyme Haemofort Iron protosulfate Iron sulfate heptahydrate lron(2- ) sulfate heptahydrate Iron(ll) sulfate heptahydrate Iron vitriol Ironate Irosul Melanterite mineral Presfersul Sal Martis Salt of steel Shoemaker s Black Siderotil mineral Sulfuric acid, iron(2+) salt (1 1), heptahydrate Szomolnikite mineral Tauriscite mineral. As a chemical intermediate, in electroplating, as a pesticide and medicinally as a hematinic. Registered by EPA as a herbicide (cancelled). Blue-green monoclinic crystals d n 1.897 loses H2O to form the tetrahydrate at 56.6", and the monohydrate at 65" soluble in H2O, insoluble in EtOH LDso (mus iv) n 65 mg/kg, (mus orl) = 1520 mg/kg. Generic Sigma-Aldrich Co. 

The preparation of green vitriol (ferrous sulphate) from roasted pyrites is described there are three kinds of vitriol, blue (from Cyprus or Hungary, copper sulphate), green (from Spa, etc., ferrous sulphate), and white, sold in small cakes and called in France white copperas (couperose blanche) and used as an eye-lotion (zinc vitriol or zinc sulphate) the best is green vitriol, the blue,... 

FeS04.7H20. A blue green crystalline compound r.d., 1.898, m.p., 64°C known as green vitriol or copperas. 

Ferrous Sulfate (Iron Sulfate or Green Vitriol), FeS04.7H P mw 278.03i blue-gm monocl cry sts, sp gr 1.899 at 18.8°, mp 64 —7HaO at 300° sol in w, insol in ale. Can be prepd by the action of dil. sulfuric acid on iron or by other methods. Used in lab for detn of inorg or org nitrates (See next item)... 

But the only salt6 of iron of great commercial importance are the protosulphate or green vitriol, and the double haloid salt, the ferrocyanide of iron, better known as prusdan blue. To these the Editor-will, therefore, confine his attention iu what follows but, In connection with the latter, it will be necessary to describe the preparation of another important salt, in which iron occurs as an element, the sesqttiferro-cyanide of potassium, known commercially as prumate of potassa. 

Chalcanthon (Latin chalccmthum) is evidently used by Dioscorides to designate the sulphate of copper (blue vitriol), and also to include mixtures of sulphates of copper and iron, or even the sulphate of iron itself (green vitriol). The best, he says, is blue and transparent, and obtained by evaporation to blue crystals, but also it is obtained as... 

The value of chalcanthum in coloring leather black, doubtless in conjunction with tannin, would depend upon the iron present, and as both Dioscorides and Pliny refer to variations in color of different grades of chalcanthum, it is evident that both green and blue vitriol and mixtures of the two passed under that designation. 

It will be recalled that the chalcanthum of Pliny and Dioscorides was either blue vitriol, green vitriol or apparently more commonly a mixture of the two, obtained by the weathering of wet iron or copper-pyrites. The above specifications would appear to recognize these varieties of flowers of copper. Some specimen recipes will perhaps convey a more adequate understanding of the processes employed. 

It is of interest to note the use of the word vitriol (vitriolum) as applied to the impure sulphate of iron produced by the weathering of pyrites. This substance was known, it will be recalled, to Pliny and Dioscorides, but the name for it was chalcanthum, green or blue. It is worthy of note also that the preparation of cinnabar by uniting mercury and sulphur occurs in this manuscript seemingly... 

Depicted as the index finger of the Hand and a six pointed star, is Vitriol. Today this term usually denotes the blue crystalline salt, copper sulfate or the green crystals of iron sulfate, but there are other vitriols as well. There are writings describing the use of these materials dating to at least 600 B.C.E. 

---