Ferrocyanide is the name of the anion [Fe(CN)], it is the commercial interest as a precursor to the pigment with what idealized chemical formula?
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Ferrocyanide Ferrocyanide is the name of the anion [Fe(CN)]. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula KFe(CN). [Fe(CN)] is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment. Although many salts of cyanide are highly toxic, ferro- and ferricyanides are less toxic because they tend not to release free cyanide. It is of commercial interest as a precursor to the pigment Prussian blue and, as its potassium salt, an anticaking agent.
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Prussian blue Prussian blue is a dark blue pigment with the idealized chemical formula Fe7(CN)18 . To better understand the binding situation in this complex compound the formula can also be written as Fe4[Fe(CN)6]3 · "x"H2O . Another name for the color is Berlin blue or, in painting, Parisian or Paris blue. Turnbull's blue is the same substance, but is made from different reagents, and its slightly different color stems from different impurities.
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Xenon dioxide Xenon dioxide, or xenon(IV) oxide, is a compound of xenon and oxygen with formula XeO, which was synthesized in 2011. It is synthesized at 0 °C by hydrolysis of xenon tetrafluoride (with 2.00 mol/L HSO).
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Copper hydride Copper hydride is a pyrophoric, inorganic compound with the chemical formula (CuH)"n" (also written as [CuH]"n" or CuH). It is an odourless, metastable, red solid, rarely isolated as a pure composition, that decomposes to the elements. Copper hydride is mainly produced as a reducing agent in organic synthesis and as a precursor to extremely reactive catalysts.
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Potassium ferricyanide Potassium ferricyanide is the chemical compound with the formula K[Fe(CN)]. This bright red salt contains the octahedrally coordinated [Fe(CN)] ion. It is soluble in water and its solution shows some green-yellow fluorescence. It was discovered in 1822 by Leopold Gmelin, and was initially used in the production of ultramarine dyes.
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N-Propyl chloride "n"-Propyl chloride (also 1-propyl chloride or 1-chloropropane) is a colorless, flammable chemical compound. It has the chemical formula CHCl and is prepared by reacting "n"-propyl alcohol with phosphorus trichloride in the presence of a zinc chloride catalyst.
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Barium peroxide Barium peroxide is the inorganic compound with the formula BaO. This white solid (gray when impure) is one of the most common inorganic peroxides, and it was the first peroxide compound discovered. Being an oxidizer and giving a vivid green colour upon ignition (as do all barium compounds), it finds some use in fireworks; historically, it was also used as a precursor for hydrogen peroxide.
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Cobalt blue Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with alumina at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAlO. Cobalt blue is lighter and less intense than the (iron-cyanide based) pigment Prussian blue. It is extremely stable and has historically been used as a coloring agent in ceramics (especially Chinese porcelain), jewelry, and paint. Transparent glasses are tinted with the silica-based cobalt pigment smalt.
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Fuchsine Fuchsine (sometimes spelled fuchsin) or rosaniline hydrochloride is a magenta dye with chemical formula CHN·HCl. There are other similar chemical formulations of products sold as fuchsine, and several dozen other synonyms of this molecule.
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Cyclopropenone Cyclopropenone is an organic compound with molecular formula CHO consisting of a cyclopropene carbon framework with a ketone functional group. It is a colorless, volatile liquid that boils near room temperature. The chemical properties of the compound are dominated by the strong polarization of the carbonyl group, which gives a partial positive charge with aromatic stabilization on the ring and a partial negative charge on oxygen. It is an aromatic compound.
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Titanium tetrachloride Titanium tetrachloride is the inorganic compound with the formula TiCl. It is an important intermediate in the production of titanium metal and the pigment titanium dioxide. TiCl is an unusual example of a metal halide that is highly volatile. Upon contact with humid air, it forms spectacular opaque clouds of titanium dioxide (TiO) and hydrogen chloride (HCl). It is sometimes referred to as "tickle" due to the phonetic resemblance of its molecular formula (TiCl) to the word.
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1,5-Cyclooctadiene 1,5-Cyclooctadiene is the organic compound with the chemical formula CH. Generally abbreviated COD, this diene is a useful precursor to other organic compounds and serves as a ligand in organometallic chemistry. It is a colorless liquid with a strong odor. 1,5-Cyclooctadiene can be prepared by dimerization of butadiene in the presence of a nickel catalyst, a coproduct being vinylcyclohexene. Approximately 10,000 tons were produced in 2005.
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Fluoronium Fluoronium (systematically named fluoranium, and μ-fluorido-dihydrogen(1+)) is an inorganic cation with the chemical formula H2F+ (also written [H2F]+ ). It contributes no colour to fluoronium salts. It is a very strong acid, and dilute fluoronium solutions are corrosive and can attack the skin. It can be formed by protonation or self-ionic dissociation of hydrogen fluoride:
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Sinopia Sinopia (also known as sinoper, named after the Turkish city Sinop) is a dark reddish-brown natural earth pigment, whose reddish colour comes from hematite, a dehydrated form of iron oxide. It was widely used in Classical Antiquity and the Middle Ages for painting, and during the Renaissance it was often used on the rough initial layer of plaster for the underdrawing for a fresco. The word came to be used both for the pigment and for the preparatory drawing itself, which may be revealed when a fresco is stripped from its wall for transfer.
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Bice Bice, from the French "bis", originally meaning dark-coloured, is a green or blue pigment. In French the terms "vert bis" and "azur bis" mean dark green and dark blue respectively. Bice pigments were generally prepared from basic copper carbonates, but sometimes ultramarine or other pigments were used.
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Crocoite Crocoite is a mineral consisting of lead chromate, PbCrO, and crystallizing in the monoclinic crystal system. It is identical in composition with the artificial product chrome yellow used as a paint pigment.
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Iron(II) sulfate Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range of salts with the formula FeSO·"x"HO. These compounds exist most commonly as the heptahydrate ("x" = 7) but are known for several values of "x". The hydrated form is used medically to treat iron deficiency, and also for industrial applications. Known since ancient times as copperas and as green vitriol, the blue-green heptahydrate is the most common form of this material. All the iron(II) sulfates dissolve in water to give the same aquo complex [Fe(HO)], which has octahedral molecular geometry and is paramagnetic. The name copperas dates from times when the copper(II) sulfate was known as blue copperas, and perhaps in analogy, iron(II) and zinc sulfate were known respectively as green and white copperas.
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Cadmium cyanide Cadmium cyanide is an inorganic compound with the formula Cd(CN). It is a white crystalline compound that is used in electroplating. It is very toxic, along with other cadmium and cyanide compounds.
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Naphthionic acid Naphthionic acid is an organic compound with the formula CH(SOH)(NH). It is one of several aminonaphthalenesulfonic acids, derivatives of naphthalene containing both amine and sulfonic acid functional groups. It is a white solid, although commercial samples can appear gray. It is used in the synthesis of azo dyes such as Rocceline (a. k. a. Solid Red A), during which the amino group of the acid (in the form of a salt) is diazotated and then coupled with, in the case mentioned, β-naphthol. It is prepared by treating 1-aminonaphthalene with sulfuric acid.
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Manganese violet Manganese violet is the inorganic compound called ammonium manganese(III) pyrophosphate. The formula indicates that pyrophosphate (P2O74- ), ammonium (NH4+ ), and manganese(III) make up this solid. It is prepared by heating a mixture of Mn2O3 , diammonium phosphate and phosphoric acid. This material is a popular inorganic pigment.
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Hafnium tetrachloride Hafnium(IV) chloride is the inorganic compound with the formula HfCl. This colourless solid is the precursor to most hafnium organometallic compounds. It has a variety of highly specialized applications, mainly in materials science and as a catalyst.
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Ethylenediamine Ethylenediamine (abbreviated as en when a ligand) is the organic compound with the formula CH(NH). This colorless liquid with an ammonia-like odor is a strongly basic amine. It is a widely used building block in chemical synthesis, with approximately 500,000 tonnes produced in 1998. Ethylenediamine readily reacts with moisture in humid air to produce a corrosive, toxic and irritating mist, to which even short exposures can cause serious damage to health (see safety).