Mineral, orange

Lead Oxide or Lead Tetroxide (Minium, Red Lead, Mineral Orange, Mineral Red, Plumbo, Puce, Orthoplumbate, Paris or Saturn Red). 

SYNS C.I. 77578 C.I. PIGMENT RED 105 DILEAD(II) LEAD(IV) OXIDE GOLD SATINOBRE LEAD ORTHOPLUMBATE LEAD TETRAOXIDE MINERAL ORANGE MINERAL RED MINIUM MINIUM NON-SETTING RL-95 ORANGE LEAD PARIS RED PLUMBOPLUMBIC OXIDE RED LEAD RED LEAD OXIDE SANDIX SATURN RED TRILEAD TETROXIDE... 

MINERAL ORANGE or MINERAL RED (1314-41-6) see lead oxide, red. MINERAL SPIRITS (8052-41-3) see Stoddard solvent. 

MINERAL ORANGE (1314-41-6) An oxidizer. Decomposes above 932°F/500°C, emitting oxygen. Reacts, possibly violently, with reducing agents, powdered metals aluminum, titanium, zirconium, zinc, etc., alcohols, dichloromethylsilane, hydrazine, hydrogen trisulfide, ethers, glycols, peroxyformic acid, phosphorus, selenium oxychloride, sulfur trioxide. 

Synonyms Cl 77578 Lead orthoplumbate Lead pi.lH) oxide Lead tetrox-ide Mineral orange Mineral red Minium Paris red Pigment red 105 Plumboplumbic oxide Red lead Red lead oxide Saturn red Trilead tetroxide Empirical 04Pb5 Formula 2PbO PbOj... 

Orange Mineral Lead oxide pigment which is finer and of a brighter color than red lead. Made by roasting white lead carbonate or sublimed litharge. Also known as Mineral Orange. 

Lead(II,IV) oxide Minium Mineral orange. Red lead... 

Orange mineral Orange Further processing of red/white lead... 

In 1868, within a decade of the development of the spectroscope, an orange-yeUow line was observed in the sun s chromosphere that did not exactiy coincide with the D-lines of sodium. This line was attributed to a new element which was named helium, from the Greek hellos, the sun. In 1891 an inert gas isolated from the mineral uranite showed unusual spectral lines. In 1895 a similar gas was found in cleveite, another uranium mineral. This prominent yellow spectral line was then identified as that of helium, which to that time had been thought to exist only on the sun. In 1905 it was found that natural gas from a well near Dexter, Kansas, contained nearly 2% helium (see Gas, natural). 

The first chromium compound was discovered in the Ural mountains of Russia, during the latter half of the eighteenth century. Crocoite [14654-05-8] a natural lead chromate, found immediate and popular use as a pigment because of its beautihil, permanent orange-red color. However, this mineral was very rare, and just before the end of the same century, chromite was identified as a chrome bearing mineral and became the primary source of chromium [7440 7-3] and its compounds (1) (see Chromiumand chromium alloys). 

Copper Oxides. Coppet(I) oxide [1317-39-17 is a cubic or octahedral naturally occurring mineral known as cuprite [1308-76-5]. It is ted or reddish brown in color. Commercially prepared coppet(I) oxides vary in color from yellow to orange to ted to purple as particle size increases. Usually coppet(I) oxide is prepared by pytometaHutgical methods. It is prepared by heating copper powder in air above 1030°C or by blending coppet(II) oxide with carbon and heating to 750°C in an inert atmosphere. A particularly air-stable coppet(I) oxide is produced when a stoichiometric blend of coppet(II) oxide and copper powder ate heated to 800—900°C in the absence of oxygen. Lower temperatures can be used if ammonia is added to the gas stream (27-29). 

Fig. 3. Schematic process flow diagram for an imitation cheese product having the following formulation dry ingredients, calcium caseinate (or rennet casein), 24.5 wt % tapioca flour, 3.0 wt % salt, 2.16 wt % adipic acid, 0.6 wt % vitamins and minerals, 0.1 wt % sorbic acid (mold inhibitor), 0.5 wt % fat—color blend, soybean oil hydrogenated to a Wiley melting point of 36°C, 21.3 wt % lactylated monoglycerides, 0.05 wt % red-orange coloring, 0.01 wt...

Properiies.—Methyl orange is the sodium salt of the sul-phoftic acid, and dissolves in water with a yellow colour. Tire fr acid is red, and its action as an indicator depends upon this change on the addition of mineral acid. 

Commercial elemental sulfur is usually of bright-yellow color at 20 °C [36]. Pure orthorhombic a-Ss is, however, of greenish-yellow color at 20 °C but totally colorless at 77 K while commercial sulfur often remains pale-yellow at this temperature [59]. The reasons for this different behavior are twofold. Commercial samples are never pure Ss but besides traces of organic impurities they always contain Sy in concentrations of between 0.1 and 0.5% [59]. Sulfur found as a mineral in Nature sometimes also contains Sy but in addition traces of selenium are quite often present (up to 680 ppm Se, probably as SySe molecules) [60]. These minor components influence the color of the samples at ambient and low temperatures in the sense that a more orange-type of yellow ( egg-yellow ) is recognized. 

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