White acid

Commercial acetaldehyde has the following typical specifications assay, 99% min color, water-white acidity, 0.5% max (acetic acid) specific gravity, 0.790 at 20°C bp, 20.8°C at 101.3 kPa (1 atm). It is shipped in steel dmms and tank cars bearing the ICC red label. In the Hquid state, it is noncorrosive to most metals however, acetaldehyde oxidizes readily, particularly in the vapor state, to acetic acid. Precautions to be observed in the handling of acetaldehyde have been pubHshed (103). 

Black with white Acid gas chlorine, hydrogen chloride,... 

The pure acid can be obtained by recrystallization from water. For each 10 g. of acid about 300 ml. of water and 0.5 g. of Norit are required. The recovery is 85-90% of pure white acid melting at 165.5-166°. 

Much colour is stripped, but cotton remains white Acid Dyestuff Boil with Hydrosulphite A X... 

Naphthol black, naphthylamine black, nerol, amido black, amine black, azo acid black, azo merino black, palatine black, supramine black, sulphoncyanine black, sulphon black. Biebrich patent black, cresol black, Guinea black, etc. The cotton remains white Acid Dyestuff. On boiling with Hydrosulphite A X, the colour is permanently discharged. 

Calcium Acid Pyrophosphate occurs as a fine, white, acidic powder. It is insoluble in water, but it is soluble in dilute hydrochloric and nitric acids. 

A neutral solution of ferric sulphate upon concentration does not deposit crystals of the nonahydrate, but a mixture of yellowish green copiapite (see p. 161), and the white acid sulphate, Fe2(S04)3.H2S04.8H20 (see p. 161). 

White acidic free flowing emulsion therefore easy to handle. Viscosity will develop when added to alkaline mixes whereas neutral and acidic compounds will require the addition of a suitable alkali. 

About 20 years later, Scheele also smdied this mineral. From the mineral, he produced a white acidic powder. Scheele knew the powder was a new substance. But he could not isolate a pure element from it. Scheele s discovery was actually tungstic acid (H2WO4). 

Derivation Action of ammonium hydroxide on hydrofluoric acid with subsequent crystallization. Hazard Corrosive to skin. TLV 2.5 mg(F)/m3. Use Ceramics, chemical reagent, etching glass (white acid), sterilizer for brewery, dairy, and other equipment electroplating processing beryllium, laundry sour. 

Correlation of the results of the present three experiments requires knowledge of the nature of the carbon black and white acid surfaces with respect to their Bronsted or Lewis character. Few analytical... 

The experimental details of the preparation of samples, the pulse-irradiation procedure, and the recording and analysis of data have all been described (6, 7, 9). Product analysis was done as previously described (9), using temperature programmed gas chromatography (25°C. to 230°C.) and a 2% Versamid-900 on silanized Chromosorb (white, acid washed, 60-80 mesh) column. 

Hydroxy-3,5-diiodophenyl)propionic acid 470 A solution of iodine (50 g) and KI (48 g) in water (150 ml) is added slowly, with stirring, to a solution of 3-(/ -hydroxyphenyl)propionic acid (16.2 g) in 20% aqueous methylamine (200 ml). The mixture is stirred for a further 10 min, then made acid to Congo Red by gradual addition of 2n-HC1. The crude white acid precipitated is washed with water and recrystallized from water, the yield being 90% and the m.p. 166-168°. 

Anthrylphosphonic add 167 Anthracene (53.6 g, 0.3 mole), diethyl phosphite (170 ml, 1.33 moles), and di-/er/-butyl peroxide (30.1 ml, 0.168 mole) are heated for 4 h at 150°, whereafter much (120 ml) of the diethyl phosphite is recovered by distillation in a vacuum. The residue is treated with water (200 ml), collected, washed with water, and, for hydrolysis, heated under reflux for 72 h with a mixture of ethanol (500 ml) and concentrated hydrochloric acid (150 ml). The resulting solution is evaporated and the solid residue is heated with 5% aqueous potassium hydroxide (500 ml). Filtration and acidification then precipitate a yellow crude product (38.6 g), m.p. 279-282°, which is washed with water. For purification this product (6.5 g) is stirred with charcoal in a solution of sodium acetate (10 g) in water (100 ml) for 0.5 h at 70°. Filtration and acidification precipitate the white acid which, after drying at 120° in a vacuum, has m.p. 282-283° (dec.) (6.2 g). 

Ammonia water. See Ammonium hydroxide Ammonia white acid. See Ammonium bifluoride Ammonio-cupric sulfate. See Ammoniacal copper sulfate... 

Synonyms Acid ammonium fluoride Ammonia white acid Ammonium acid fluoride Ammonium fluoride Ammonium hydrogen fluoride... 

Synonyms Fluohydric acid Fluorohydric acid Hydrogen fluoride White acid... 

White acid. See Hydrofluoric acid White arsenic. See Arsenic trioxide White asbestos. See Asbestos White beeswax. See Beeswax, white Beeswax White birch extract. See Birch (Betula alba) extract... 

White Acid. An etchant for glass, being a mixture of HF and ammonium bifluoride. 

Black acid has limited application, such as the manufacture of fertilisers, otherwise it must be treated to remove the colouration by oxidation of the carbon with hydrogen peroxide. In either case the return from black acid will be at a discount to the return from white acid, and for example could be taken as around US 10/t. 

Copper salts, which give a red-brown coloration or precipitate of Cu(CNS)2, should be removed as white acid-insoluble cuprous thiocyanate by the addition of alkali sulfite. 

White Acid (Ammonium Difluonde MCI) Xylene Zinc Chloride Zinc Nitrate Zinc Sulfate... 

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