Sulfur is available from agricultural supply stores where it is sold as a fungicide under the name 'dusting sulfur'. After it has become neutral, flush the water away with ethanol and allow the sulfur to dry. Entrée « Ammonium sulfide » dans la base de données de produits chimiques. 2 N H 3 + H 2 SO 4 → N H 4 2 SO 4. Mix the dry powder with 2% magnesium carbonate to neutralize any acid that may be formed in reactions with the atmosphere. Sulfur can increase the sensitivity of some mixtures, especially those based on chlorate or perchlorate oxidizers. En raison de son odeur nauséabonde, il est un ingrédient actif de nombreux accessoires de farces et attrapes, et en particulier de certaines boules puantes. It should still be alkaline after two days, after which time the sulfur may be filtered and washed with hot water to remove the ammonia. Crude sulfur without discoloring impurities, Sulfur that has been chemically precipitated in water, Bright or dark sulfur, free of Se, Te and As, Crude sulfur with hydrocarbon contamination, Sulfur purified by distillation (actually sublimation), Native sulfur from superheated water injection, Flowers of sulfur treated with carbon disulfide, Precipitated from polysulfide solutions, up to 45% CaSO4, Naturally occurring elemental form – often large crystals, Precipitated from polysulfide, washed with HCl, Elemental sulfur from any combined sources, Ground sulfur with low acid, ash and moisture content, Crude sulfur that solidified on a moving belt, Refined sulfur at least 99.8% pure, cast or in lumps, Powdered and treated for easy water dispersion. Ammonium sulfide is an unstable ammonium salt with the formula (NH 4) 2 S. It is a yellowish solid, stable below -18 °C. Dans la nature, c'est un produit du processus de décomposition. A 100 μL needle syringe was used to extract the liquid production and determine the ammonia nitrogen and divalent sulfur ions content. Ammonium sulfite is produced in gas scrubbers, now obsolete, consisting of ammonium hydroxide to remove sulfur dioxide from emissions from power plants. Stir well occasionally and measure the pH. volume 22, https://fr.wikipedia.org/w/index.php?title=Sulfure_d%27ammonium&oldid=148546232, Pages avec des arguments non numériques dans formatnum, Infobox Chimie avec données obsolètes : directive 67/548/EEC, licence Creative Commons attribution, partage dans les mêmes conditions, comment citer les auteurs et mentionner la licence, liquide incolore à jaunâtre, odeur proche du. It should still be alkaline after two days, after which time the sulfur may be filtered and washed with hot water to remove the ammonia. A mixture of ammonia gas and water vapor is introduced into a reactor that contains a saturated solution of ammonium sulfate and about 2 to 4% of free sulfuric acid at 60 °C. C'est un composé relativement instable (cristaux se décomposant à −18 °C, mais qui existe et est plus stable en solution aqueuse. Meyer B, Ward K, Koshlap K, Peter L "Second dissociation constant of hydrogen sulfide" Inorganic Chemistry, (1983). Burning sulfur produces sulfur dioxide gas, inhalation of which should be avoided because it is extremely poisonous. This needs to be neutralized before use as it could cause spontaneous ignition. It also tends to increase the burning rate and friction or shock sensitivity of most mixtures. Ainsi, de telles solutions consistent principalement en un mélange d'ammoniac et d'hydrosulfure d'ammonium (NH4)SH. 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