Potassium hydroxide

Potassium hydroxide Property

mp : 361 °C(lit.) bp : 1320°C density : 1.450 g/mL at 20 °C vapor pressure : 1 mm Hg ( 719 °C) refractive index : n20/D 1.421 Fp : 52 °F storage temp. : 0-6°C solubility : H2O: 1 M at 20 °C, clear, colorless form : powder Water Solubility : soluble Sensitive : Air Sensitive & Hygroscopic Merck : 14,7640 Stability:: Stable, but very hygroscopic. Dissolves exothermically in water. Incompatible with most metals, strong acids, acid chlorides, organic materials, zinc, aluminium, nitroalkanes, nitrobenzene, chlorine dioxide. Reacts vigorously with a wide variety of other materials. Readily absorbs water and carbon dioxide from the air. CAS DataBase Reference: 1310-58-3(CAS DataBase Reference) NIST Chemistry Reference: Potassium hydroxide(1310-58-3) EPA Substance Registry System: Potassium hydroxide (K(OH))(1310-58-3)

Safety

Hazard Codes : C,F,T,Xi Risk Statements : 34-35-22-11-39/23/24/25-23/24/25-36/38-36/37-67-52/53 Safety Statements : 7-16-36/37-45-36/37/39-26-61 RIDADR : UN 2924 3/PG 2 WGK Germany : 1 RTECS : TT2100000 F : 3 HazardClass : 8 PackingGroup : II Hazardous Substances Data: 1310-58-3(Hazardous Substances Data)

Potassium hydroxide Chemical Properties,Usage,Production

Chemical Properties white crystals, flakes, sticks or pellets General Description A white solid. Corrosive to metals and tissue. Used in soap manufacture, bleach, as an electrolyte in alkaline batteries, and as a food additive. Air & Water Reactions Hydrolysis generates enough heat to ignite adjacent combustible material [Haz. Chem. Data 1966]. Dissolves in water (with liberation of heat, may steam and spatter. Solution is basic (alkaline). Deliquescent Reactivity Profile POTASSIUM HYDROXIDE absorbs moisture readily forming caustic solution that attacks aluminum and zinc. A piece of potassium hydroxide causes liquid chlorine dioxide to explode [Mellor 2:289. 1946-47]. 1,2-dichloroethylene and potassium hydroxide forms chloroacetylene, which is explosive and spontaneously flammable in air. Potassium hydroxide is highly toxic [Rutledge 1968. p. 134]. A reaction between n-nitrosomethylurea and potassium hydroxide in n-butyl ether resulted in an explosion due to the formation of diazomethane [Schwab 1972]. Potassium persulfate and a little potassium hydroxide and water ignited a polythene (polyethylene) liner of a container by release of heat and oxygen [MCA Case History 1155. 1955]. Using potassium hydroxide to dry impure tetrahydrofuran, which contains peroxides, may be hazardous. Explosions have occurred in the past. Sodium hydroxide behaves in a similar way as potassium hydroxide [NSC Newsletter Chem. Soc. 1967]. A strong base. Forms caustic solution in water. [Merck 11th ed. 1989]. Health Hazard Causes severe burns of eyes, skin, and mucous membranes. Fire Hazard Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

Potassium hydroxide Preparation Products And Raw materials

Raw materials Barium chloride dihydrate Potassium fluoride Potassium carbonate Potassium hydroxide solution MERCURY Hydrochloric acid Hydrogen Sodium hydroxide Barium chloride Potassium chloride Graphite Potassium amalgam

Preparation Products 4-(BENZYLTHIO)-3-NITROBENZALDEHYDE POLYETHYLENE GLYCOL MONOOLEYL ETHER 4-[(2-FURYLMETHYL)THIO]-3-NITROBENZALDEHYDE Potassium stearate Potassium tartrate oxalic acid, potassium salt Potassium hydrogen phthalate 2-Allylcyclohexanone 2-Amino-4-trifluoromethylbenzonitrile Organosilicon water-proofing agent 4-ETHOXYPHENYLACETIC ACID 2-BROMO-6-(1H-PYRAZOL-1-YL)PYRIDINE D-Glucosamine hydrochloride antistatic agent F695 4-(CYCLOHEXYLTHIO)-3-NITROBENZALDEHYDE 2-Benzylaminopyridine Potassium sorbate Potassium isobutylxanthate Tripotassium citrate 3,5-DIBROMO-2-ETHOXYBENZALDEHYDE Potassium metavanadate Antistatic agent PK Potassium lactate 2-(2,4-DINITROPHENOXY)ETHANOL Potassium fluoroaluminate 5-Hydroxymethyluracil Potassium citrate Piperonylic acid GELLAN GUM 1,2,3,4-TETRAHYDRO-9H-PYRIDO[3,4-B]INDOLE 4-ISOPROPOXYBENZOIC ACID PYRROLIDONE HYDROTRIBROMIDE 3-ACETYL-2-METHYL-QUINOLINE-4-CARBOXYLIC ACID Potassium titanium oxalate 2,3-Dimethylpyrazine 4-(4-CHLOROPHENYLTHIO)-3-NITROBENZALDEHYDE potassium silicate，electronic grade 2,3-Dimethylthiophene AMYLXANTHIC ACID POTASSIUM SALT Vat Grey M

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