Yellow ocher oxide

Goethite is the colored component of yellow ocher a weathering product mainly of siderite, sulfidic ores, and feldspar. It occurs in workable amounts mainly in the Republic of South Africa and France. The Fe2Oa content gives an indication of the iron oxide hydroxide content of the ocher, and is ca. 20% in the French deposits and ca. 55% in the South African. 

Ocher is a weak tinting agent and is often replaced by synthetic hydrated yellow iron oxides for brighter color and better uniformity. 

Some simple oxides are brighdy or strongly colored, and have been used as pigments. This includes the common oxides of iron, hematite, which is red and black, and goethite (syn. limonite), which is yellow or brown. These compounds have also been called ocher, yellow ocher, or brown ocher. Minium and massicot... 

Antimony lead oxide (SbzPbsOs) Diantimony trilead octaoxide EINECS 236-845-9 Lead antimonate Lead antimonate(V) Naples yellow Paris yellow. An orange-yellow pigment, A mixture of this material with carbonate and chromate of lead is also sold under this name. Cadmium sulfide, CPS, and a pale yellow ocher have been identified by this term used to stain glass, crockery and porcelain. Insoluble in H2O. 

Synonyms Calcined litharge Cl 77577 Lead monooxide Lead monoxide Lead monoxide yellow Lead oxide Lead (II) oxide Lead (2+) oxide Lead (II) oxide yellow Lead protoxide Litharge Litharge pure Pigment yellow 46 Plumbous oxide Yellow lead ocher Empirical OPb Formula PbO... 

Yellow ferric oxide. See Ferric oxide Yellow lead ocher. See Lead oxide, yellow Yellow ochre. See Iron oxide yellow Yellow pine rosin. See Rosin Yellow resin. See Rosin Yellow ultramarine. See Calcium chromate Yellow wax. See Beeswax... 

Yellow 2G. See Acid yellow 17 Yellow lake T. See Pigment yellow 100 Yellow lead ocher. See Lead oxide, yellow Yellow mercuric oxide. See Mercury oxide (ic), yellow... 

Synthetic yellow ocher n. Synthetic yellow iron oxide reduced with aluminum silicate and other extender pigments. 

Yellow iron oxide n. Fe203-xH20. Pigment yellow (77492). A natural or synthetic iron oxide. It has excellent bleed resistance, chemical resistance (both acid and alkali), lightfastness, and dispersibility, as well as excellent toxicity ratings. However, these yellow oxides have only fair heat resistance since they are subject to color change bout 177°C due to loss of water of hydration. Syn ferrite yellow, ocher, monohydrate of ferric oxide, and limonite. 

Goethite is a natural yellow oxide of iron also known as yellow ocher. These pigments are forms of hydrated ferric oxide having... 

Iron Oxides. In addition to the black iron oxide, there are several natural and synthetic yellow, brown, and red oxides. As a class, they provide inexpensive but dull, lightfast, chemically resistant, and nontoxic colors. The natural products ate known as ocher, sieima, umber, hematite, and limonite. These include varying amounts of several impurities in particular, the umbers contain manganese. Their use is limited because of low chroma, low tinting strength, and poor gloss retention. 

Pigments are classified as organic or inorganic. Organic pigments are brighter, less dense, and smaller in particle size than the more widely used, more opaque, inorganic colorants. Iron oxides or ochers are available as yellow, red, black, brown, and tan. 

OCHER. Any of various colored earthy powders consisting essentially of hydrated feme oxides mixed with clay. sand. etc. Some grades arc calcined (burnt ocher). The colors are yellow, brown, or red. 

SYNS C.I. 77577 C.I. PIGMENT YELLOW 46 LEAD OXIDE LEAD(II) OXIDE LEAD OXIDE YELLOW LEAD PROTOXIDE LITHARGE Q LITHARGE YELLOW L-28 MASSICOT MASSICOTITE PLUMBOUS OXIDE YELLOW LEAD OCHER... 

Iron Oxide Pigments. The discovery of iron oxide pigments is lost in antiquity. The cave paintings of early man were made with earth colors composed of iron oxides. Even today, natural iron oxides are still in use. The yellows such as the yellow others and siennas are hydrated ferric oxides (Fe203 H20). The nonhydrated ferric oxides (Fe203) comprise the reds and browns such as the red ochers and brown umbers. The blacks are mixed ferrous and ferric oxides (Fe304 or more precisely Fe0 Fe203). 

YELLOW LEAD OCHER (1317-36-8) A strong oxidizer. Explosive reaction with 90% peroxyformic acid, rubidium acetylide. Reacts violently with strong oxidizers, boron, chlorine, fluorine, dichloromethylsilane, calcium sulfide, hydrogen peroxide, hydrogen trisulfide (ignition), hydroxylamine (ignition), lithium carbide, metal acetylides, metal powders (e.g., aluminum, molybdenum, zirconium, etc.), perchloric acid, red phosphorus, selenium oxychloride, sodium. Incompatible with aluminum carbide, barium sulfide, silicon, sulfuryl chloride. Forms impact-sensitive explosive mixtures with dichloromethylsilane. May attack, plastics, coatings, and chlorinated rubber materials such as Hypalon , Parlon , Rutile , and fluorinated rubbers such as Viton . 

Yellow and red ocher are natural, earthy forms of Iron(lll) oxide, Fe203.The colors depend on the crystal form, which can be varied by strong heating. 

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