Sulfides incompatibilities

Citric acid is incompatible with potassium tartrate, alkali and alkaline earth carbonates and bicarbonates, acetates, and sulfides. Incompatibilities also include oxidizing agents, bases, reducing agents, and nitrates. It is potentially explosive in combination with metal nitrates. On storage, sucrose may crystallize from syrups in the presence of citric acid. 

SODIUM SULFHYDRATE (16721-80-5) NaHS Combustible solid (flash point 195°F/90°C, 73°F/23°C, 45% solution). Hydrolyzes in moist air to sodium hydroxide and sodium sulfide gas. Reacts violently with water, steam, acid, alcohols, producing heat, sodium hydrosulfide solution, and hydrogen sulfide frames spontaneously combustible. Reacts with acids, acid flimes, forming hydrogen sulfide. Incompatible with acids, amides, organic anhydrides, isocyanates, alkylene oxides, epichlorohydrin, aldehydes, alcohols, glycols, phenols, cresols, caprolactam solution, oxidizers. Corrodes most metals in the presence of moisture. On small fires, use dry chemical powder (such as Purple-K-Powder), water spray, or COj extinguishers. 

Blends with good mechanical properties can be made from DMPPO and polymers with which DMPPO is incompatible if an appropriate additive, compatibilizing agent, or treatment is used to increase the dispersion of the two phases. Such blends include mixtures of DMPPO with nylon, polycarbonate, polyester, ABS, and poly(phenylene sulfide). 

Briaux S, Gerbaud G, Jaffe-Brachet A. 1979. Studies of a plasmid coding for tetracycline resistance and hydrogen sulfide production incompatible with the prophage PI. Mol Gen Genet 170 319-325. 

Figure 10.2 illustrates selected examples of these epoxide products. Aromatic and heteroaromatic aldehydes proved to be excellent substrates, regardless of steric or electronic effects, with the exception of pyridine carboxaldehydes. Yields of aliphatic and a,/ -unsaturated aldehydes were more varied, though the enantio-selectivities were always excellent. The scope of tosylhydrazone salts that could be reacted with benzaldehyde was also tested (Fig. 10.3) [29]. Electron-rich aromatic tosylhydrazones gave epoxides in excellent selectivity and good yield, except for the mesitaldehyde-derived hydrazone. Heteroaromatic, electron-poor aromatic and a,/ -unsaturated-derived hydrazones gave more varied results, and some substrates were not compatible with the catalytic conditions described. The use of stoichiometric amounts of preformed sulfonium salt derived from 4 has been shown to be suitable for a wider range of substrates, including those that are incompatible with the catalytic cycle, and the sulfide can be recovered quantitatively afterwards [31]. Overall, the demonstrated scope of this in situ protocol is wider than that of the alkylation/deprotonation protocol, and the extensive substrate...

Separate acids from incompatible materials such as bases, active metals (ex. sodium, magnesium, potassium) and from chemicals which can generate toxic gases when combined (ex. sodium cyanide and iron sulfide). 

The Mo hydroxylases are difficult to model because of the general redox incompatibility of the reducing sulfide and oxidizing Mo(VI) moieties found in the enzymes. The outcomes and directions of modeling endeavors up to 1997 have been reviewed by Young. ... 

The conditions needed for formation of corderoite required by our estimated AG (Figure 7) are incompatible with any realistic natural environment. A combination of low pH and mildly reducing conditions with a high ratio of chloride to sulfide or sulfate is conceivable in the anaerobic sediments of closed-basin lakes, but the lowest pH would be closer to 4 than to 2.5. The AG of... 

SAFETY PROFILE Poison by ingesdon, subcutaneous, and intravenous routes. Moderately toxic by skin contact. Pyroforic in air. See also SULFIDES. When heated to decomposition it emits very toxic fumes of SOx, NOx, and NH3. Incompatible with zinc. 

SAFETY PROFILE Moderately toxic by intraperitoneal route. See also ANTIMONY COMPOUNDS and SULFIDES. Flammable when exposed to heat or by chemical reaction with powerful oxidizers. Use water to fight fire. Moderately explosive when shocked or by spontaneous chemical reaction in contact with powerful oxidizers. When heated to decomposition or on contact with acid or acid fumes it emits highly toxic fumes of oxides of sulfur and antimony. Incompatible with water or steam to produce toxic and flammable vapors and with oxidizers, e.g., Ag(C103)2, HCIO3,... 

OSHA PEL TWA 0.01 mg(As)/m3 ACGIH TLV TLV 0.01 mg/m Confirmed Human Carcinogen BEI 35 n (As)/L inorganic arsenic and methylated metabolites in urine NIOSH REL CL 2 ng(As)/mVl5M SAFETY PROFILE Confirmed human carcinogen. See also ARSENIC COMPOUNDS and SULFIDES. Flammable in the form of dust when exposed to heat or flame. Explosive when intimately mixed with powerful oxidizers, such as CI2, KNO3, or chlorates. Will react with water and steam to produce toxic and flammable vapors. Incompatible with water, steam, and strong oxidizers. 

SAFETY PROFILE Very toxic. Fire hazard by chemical reaction with easily oxidized materials. Explodes at 300°. Mixtures with sulfur are unstable storage hazards igniting immediately at 91 °C and after a 2-11 day delay period at room temperature. Incompatible with Al, As, C, Cu, metal sulfides, organic matter, P, and reducing materials. When heated to decomposition it emits toxic fumes of Br . See also BARIUM COMPOUNDS (soluble) and BROMINE. 

SAFETY PROFILE A poison. Flammable by spontaneous chemical reaction, air, moisture, or acid fumes may cause it to ignite. For explosion and disaster hazards, see SULFIDES. To fight fire, use CO2, dry chemical. Reacts violently with phosphorus(V) oxide. Mixtures with lead dioxide, potassium chlorate, or potassium nitrite explode when heated. Incompatible with CI2O, Ca(N03)2, Sr(N03)2, Ca(C103)2, Sr(C103)2, (C103)2. See also BARIUM COMPOUNDS (soluble) and SULFIDES. 

NIOSH REL (Chromium(VI)) TWA 0.025 mg(Cr(VI))/mh CL 0.05/15M SAFETY PROFILE Confirmed human carcinogen. Poison by subcutaneous route. Mutation data reported. A powerful oxidizer. A powerful irritant of skin, eyes, and mucous membranes. Can cause a dermatitis, bronchoasthma, chrome holes, damage to the eyes. Dangerously reactive. Incompatible with acetic acid, acetic anhydride, tetrahydronaphthalene, acetone, alcohols, alkali metals, ammonia, arsenic, bromine penta fluoride, butyric acid, n,n-dimethylformamide, hydrogen sulfide, peroxyformic acid, phosphorus, potassium hexacyanoferrate, pyridine, selenium. 

A powerful oxidizer. Explosive reaction with acetaldehyde, acetic acid + heat, acetic anhydride + heat, benzaldehyde, benzene, benzylthylaniUne, butyraldehyde, 1,3-dimethylhexahydropyrimidone, diethyl ether, ethylacetate, isopropylacetate, methyl dioxane, pelargonic acid, pentyl acetate, phosphoms + heat, propionaldehyde, and other organic materials or solvents. Forms a friction- and heat-sensitive explosive mixture with potassium hexacyanoferrate. Ignites on contact with alcohols, acetic anhydride + tetrahydronaphthalene, acetone, butanol, chromium(II) sulfide, cyclohexanol, dimethyl formamide, ethanol, ethylene glycol, methanol, 2-propanol, pyridine. Violent reaction with acetic anhydride + 3-methylphenol (above 75°C), acetylene, bromine pentafluoride, glycerol, hexamethylphosphoramide, peroxyformic acid, selenium, sodium amide. Incandescent reaction with alkali metals (e.g., sodium, potassium), ammonia, arsenic, butyric acid (above 100°C), chlorine trifluoride, hydrogen sulfide + heat, sodium + heat, and sulfur. Incompatible with N,N-dimethylformamide. 

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