Simultaneously Hermann, a German chemical manufacturer, discovered the new metal in a specimen of zinc oxide which had been thought to contain arsenic, since it gave a yellow precipitate, in acid solution, on the addition of sulphuretted hydrogen.
If the substance does not melt but changes colour, we may have present: zinc oxide - from white to yellow, becoming white on cooling; stannic oxide - white to yellowish brown, dirty white on cooling; lead oxide - from white or yellowish-red to brownish-red, yellow on cooling; bismuth oxide - from white or pale yellow to orange-yellow or reddish-brown, pale yellow on cooling; manganese oxide - from white or yellowish white to dark brown, remaining dark brown on cooling (if it changes on cooling to a bright reddishbrown, it indicates cadmium oxide); copper oxide - from bright blue or green to black; ferrous oxide - from greyish-white to black; ferric oxide - from brownish-red to black, brownish-red on cooling; potassium chromate - yellow to dark orange, fusing at a red heat.
This is drawn off, cooled and filtered, and forms a white paint of good body, consisting of about 65% lead sulphate, 26% lead oxide, 6% zinc oxide and 3% other substances.
The distillation of 1000 lb charge lasts 5-6 hours, requires 500-600 lb coke or 30 gallons reduced oil, and yields about to% metallic zinc and I% blue powder - a mixture of finely-divided metallic zinc and zinc oxide.
The magnetic concentrates contain enough zinc to be well adapted to the manufacture of zinc oxide.
Zn(OK)2] Zinc oxide is used in the arts as a white pigment (zinc white); it has not by any means the covering power of white lead, but offers the advantages of being non-poisonous and of not becoming discoloured in sulphuretted hydrogen.
Zinc may be quantitatively estimated by precipitating as basic carbonate, which is dried and ignited to zinc oxide.
Paris) by heating zinc oxide with carbon, and was for some time considered to be identical with hydrogen.
The more important are as follows: by decomposing strongly heated sulphuric acid in the presence of a contact substance; by heating an intimate mixture of one part of sodium nitrate with two parts of zinc oxide (T.
The sulphides can be removed by " oxidizing " them into thiosulphates by means of atmospheric air, with or without the assistance of other agents, such as manganese peroxide; or by " carbonating " them with lime-kiln or other gases containing carbon dioxide; or by precipitating them with lead or zinc oxide.
It is in the Kansas natural-gas field, ships large quantities of grain, and has a large zinc oxide smelter and a large oil refinery, and various manufactures, including vitrified brick and tile, flour, lumber, chemicals, window glass, bottles, pottery and straw boards.
It is a surface micromachined piezoelectric accelerometer employing a zinc oxide (ZnO) active piezoelectric film.
zinc oxide Gold Grade These are the top grade zinc oxide tapes.
Heating a metal or paint containing zinc can cause zinc oxide fumes or dust.
Zinc oxide Gold Grade These are the top grade zinc oxide Gold Grade These are the top grade zinc oxide tapes.
Zinc and Coal Tar Paste BP containing zinc oxide 6% and coal tar 6% .
Stromeyer in a sample of zinc carbonate from which a specimen of zinc oxide was obtained, having a yellow colour, although quite free from iron; Stromeyer showing that this coloration was due to the presence of the oxide of a new metal.
The primary and secondary phosphines are produced when the alkyl iodides are heated with phosphonium iodide and zinc oxide to 150Ã‚° C. (A.
Zinc and Coal Tar Paste BP containing zinc oxide 6% and coal tar 6 %.
If she develops a diaper rash, use an ointment containing zinc oxide to help clear up her skin.
When this happens, be sure to apply a diaper cream that contains zinc oxide.
Diaper Ointment-You'll want to purchase an ointment that contains zinc oxide.
Women with sensitive skin, eczema, rosacea, and other skin concerns may find that the zinc oxide soothes their skin to a certain degree, and that mineral cosmetics in general doesn't cause as much inflammation as other forms of makeup.
Micronized titanium dioxide and zinc oxide are both common ingredients.
The minerals, zinc oxide and titanium dioxide block UVB rays, according to this New York Times article.
Some mineral makeup brands that are as seen on TV have SPF protection built-in, due to the zinc oxide and titanium content.
Physical sunscreens are really sun blockers and include titanium dioxide, red petrolatum, and zinc oxide.
Those that contain zinc oxide are especially effective.
Sunburns may be avoided by the liberal use of a sunscreen containing either an opaque active ingredient such as zinc oxide or titanium dioxide or a nonopaque active ingredient such as PABA (para-aminobenzoic acid) or benzophenone.
Belli's anti-chloasma cream is an oil-free sunscreen containing titanium dioxide and zinc oxide to block UVA and UVB rays.
Manufacturers make sunscreens with zinc oxide or titanium dioxide just for children.
Pinxav, which contains both zinc oxide and petroleum, is another ointment that works very well for treating diaper rash.
Revision combines Avobenzone and Zinc Oxide to give you broad spectrum protection.
There are two widely used forms of zinc supplements for acne: zinc gluconate and zinc oxide.