Colloidal mercury

HgS Hgl2, Takei observed microscopic black spots which he attributed to colloidal mercury. Heating facilitates reversion of the crystal to the yellow form which is explained as a vaporization of the Hg deposits. If this mechanism proves to be correct, this process is merely a permanent photochemical decomposition of the complex and not a true photochromic phenomenon. [Pg.300]

Mercury fulminate is prepared by dissolving mercury in nitric acid, after which the solution is poured into 95 % ethanol. After a short time, vigorous gas evolution takes place and crystals are formed. When the reaction is complete, the crystals are filtered by suction and washed until neutral. The mercury fulminate product is obtained as small, brown to grey pyramid-shaped crystals the color is caused by the presence of colloidal mercury. [Pg.270]

SYNS COLLOIDAL MERCURY KWIK (DUTCH) MERCURE (FRENCH) MERCURIO (ITALIAN) D MERCURY, METALLIC (DOT) NCI-C60399 QUECKSILBER (GERMAN) QUICK SILVER RCRA WASTE NUMBER U151 RTEC (POLISH)... [Pg.872]

Mercury Derivatives.—The mode of preparation of these compounds is similar to that adopted for the preceding compounds. When mercuric chloride is used and the operations are carried out in methyl alcohol, a yellow powder results, which is soluble in methyl alcohol, glycerine, ethylene glycol, and acidified potassium iodide solution. It is decomposed by water or sodiunr hydroxide aird is only slightly soluble in dilute acids, but if treated with antimony compounds, antimonyl derivatives are obtained, which are more soluble and are stable in alkaline solutions. The decomposition by water is said to give rise to colloidal mercury and 3-amino-4-hydroxyplienylarsenoxide, OH.CgHa.(NH2).AsO. If an excess of mercuric chloride is used, the oxidation proceeds to o-aminophenol, mercurous chloride, and arsenious... [Pg.380]

Synonym(s) Colloidal mercury liquid silver mercury, metallic (DOT) quicksilver metallic mercuryb hydrargyrum0 Bichloride of mercury mercury bichloride01 mercury chlorided mercury dichloride mercury perchloride mercury (II) chloride perchloride of mercury corrosive sublimated corrosive mercury chloride dichloromercury Etiops mineral0 mercury sulfide, blackd vermilion Chinese red C.l. Pigment Red 106 C.1.77766° quicksilver vermilion Chinese vermilion red mercury sulfide artificial cinnabar red mercury sulfuretd... [Pg.398]

Traces of colloidal mercury impart a gray color and render the product very susceptible to oxidation. [Pg.35]

CAS/DOT IDENTIFICATION 7439-97-6/UN 2809 SYNONYMS colloidal mercury, quick silver... [Pg.335]

SYNONYMS colloidal mercury, elemental mercury, hydrargyrum, liquid silver, metallic mercury, quicksilver... [Pg.717]

Hg(N3)2 is somewhat photosensitive and turns yellow in bright daylight, owing to the appearance of colloidal mercury. It also decomposes thermally [2], with gas evolution starting at 212°C, followed by discoloration at 220°C and explosion at 300°C. The compound is slightly soluble in cold water (0.257 g in 100 g solution at 20°C) [223] in hot water it dissolves more readily, without noticeable hydrolysis. It also dissolves in ethanolamine, apparently without chemical reaction [227], and in hydrofluoric acid, as a cation complex. Upon evaporation of the acid, the azide appears unchanged [196]. [Pg.63]

Synonyms/Trade Names Mercury metal Colloidal mercury, Metallic mercury, Quicksilver I Synonyms of other Hg compounds vary depending upon the specific compound. ... [Pg.193]

Alternative Names/Abbreviations Quicksilver, colloidal mercury, liquid silver... [Pg.239]

Colloidal manganese. See Manganese Colloidal mercury. See Mercury Colloidal selenium. See Selenium Colloidal silica. See Silica, colloidal Silica, fumed... [Pg.1030]

Synonyms Colloidal mercury Hydrargyrum Liquid silver Mercury, metallic Quicksilver... [Pg.2532]

Finally, electrochemical techniques including voltammetric techniques and ion-selective electrodes (ISE) for Cd have also been reported in the literature for free Cd determinations in waters, allowing the differentiation between labile Cd species from strong Cd complexes (e.g., boimd to humic and fulvic acids and colloids). Mercury is still the electrode material of choice for detection of Cd due to its large hydrogen overvoltage and its remarkable reproducibility. [Pg.326]

The third method has been employed by Lottermoser for the formation of concentrated solutions of colloidal sulfides. This ingenious method consists in the employment of such salts that the products with HaS will not be highly dissociated. For instance, concentrated solutions of colloidal mercury sulfide were made by the use of mercury cyanide. The HCN formed is of course very weakly dissociated and therefore cannot have a great precipitating effect. He also prepared colloidal copper sulfide by means of copper glycocoll and HjS. [Pg.178]

Various theories trying to explain the nature of brown versus white MF have been proposed. Probably, the most often cited one is a presence of colloidal mercury in MF crystals [2, 15, 29, 41, 46]. This reasoning has been, however, rejected by other scientists who have examined both color modifications and did not... [Pg.41]

Hg2(N3)2 592 [103] 593 [27] White Slightly soluble in water, photosensitive (turns yellow and gray under light— colloidal mercury forms), very toxic... [Pg.106]

Hg(N3)2 Clear to lemon yellow Slightly soluble in water, photosensitive (turns yellow under light due to formation of colloidal mercury) but less than Hg2(N3)2... [Pg.106]

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