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Several other types of snakes have similar coloring, but the copperhead is distinctive. Or rounder heads, so the snake's head shape can be a good indicator.
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IUPAC name Ammonium 2,6-dioxo-5-[(2,4,6-trioxo-5-hexahydropyrimidinylidene)amino]-3H-pyrimidin-4-olate | |
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ECHA InfoCard | 100.019.334 |
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Properties | |
C8H8N6O6 | |
Molar mass | 284.188 g·mol−1 |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
verify (what is ?) | |
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Murexide (NH4C8H4N5O6, or C8H5N5O6·NH3), also called ammonium purpurate or MX, is the ammoniumsalt of purpuric acid. It may be prepared by heating alloxantin in ammoniagas to 100 °C, or by boiling uramil (5-aminobarbituric acid) with mercury oxide. W. N. Hartley[1] found considerable difficulty in obtaining specimens of murexide sufficiently pure to give concordant results when examined by means of their absorption spectra, and consequently devised a new method of preparation for murexide. In this process alloxantin is dissolved in a large excess of boiling absolute alcohol, and dry ammonia gas is passed into the solution for about three hours. The solution is then filtered from the precipitated murexide, which is washed with absolute alcohol and dried. The salt obtained in this way is in the anhydrous state. It may also be prepared by digesting alloxan with alcoholic ammonia at about 78 °C; the purple solid so formed is easily soluble in water, and the solution produced is indistinguishable from one of murexide.
Murexide in its dry state has the appearance of a reddish purple powder, slightly soluble in water. In solution, its color ranges from yellow in strong acidic pH through reddish-purple in weakly acidic solutions to blue-purple in alkaline solutions. The pH for titration of calcium is 11.3.
History[edit]
Justus von Liebig and Friedrich Wöhler in Giessen, Germany, had investigated the purple product, murexide, obtained from snake excrement in the 1830s, but this was not an abundant raw material, and a method of using it as a dyestuff was not established at that time.[2] In the 1850s, French colorists and dye-producers, such as Depoully in Paris, succeeded in making murexide from abundant South American guano and of applying it to natural fibers. It was then widely adopted in Britain, France and Germany.
Usage[edit]
Murexide is used[citation needed] in analytical chemistry as a complexometric indicator for complexometric titrations, most often of calcium ions, but also for Cu, Ni, Co, Th and rare-earth metals. Cf.Eriochrome Black T. Due to the minute amounts needed for this purpose, it is often used in a 1:250 mixture with potassium sulfate.[citation needed]
Murexide is also used as a colorimetric reagent for measurement of calcium and rare-earth metals; for calcium, the pH required is 11.3, detection range lies between 0.2 and 1.2 ppm, and the maximum absorbance wavelength is 506 nm.[citation needed]
Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbonpollutants.[citation needed]
References[edit]
- ^Some information on the chemist Walter Noel Hartley is available hereArchived 2013-05-26 at the Wayback Machine.
- ^Peter J. T. Morris; Anthony S. Travis (November 1992), 'A History of the International Dyestuff Industry', American Dyestuff Reporter, 81 (11)
![How to tell if a snake is venomous How to tell if a snake is venomous](http://tradepips.com/wp-content/uploads/2016/01/snake-borders-indicator-trades-1024x569.png)
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). 'Murexide'. Encyclopædia Britannica. 19 (11th ed.). Cambridge University Press. p. 36.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Murexide&oldid=900352712'
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Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together.Sincerely,Elizabeth DouglasCEO, wikiHow. Snakes are common reptiles across many parts of the world and there are many different species that you can learn all about!
When identifying snakes, avoid getting close so that the snake doesn't feel threatened and so that you stay safe from. To identify venomous snakes, look for characteristics such as a rattling tail, elliptical eyes, and a triangular head. Identify non-venomous snakes by their body color, double belly scales, and round eyes. You can also use reference resources to help you identify snakes.
See if the snake has a bright and colorful pattern. This is one of the easiest ways to tell if a snake is venomous from a distance.
Many snakes that have a bright, colorful body are venomous, such as the coral snake. X Research source. The color and pattern of is the best way to identify this species, as it lacks other common characteristics of venomous snakes such as a rattle, elliptical eyes, and heat sensing pits.
Coral snakes have bright yellow, red, and black bands. However, there are always exceptions to these characteristics. For example, the Black Mamba snake which is found in Eastern and Southern Africa is extremely venomous, yet it is solid brown in color. X Research source.
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