Potassium hydroxide index

Ethyl Vinyl Ether. The addition of ethanol to acetylene gives ethyl vinyl ether [104-92-2] (351—355). The vapor-phase reaction is generally mn at 1.38—2.07 MPa (13.6—20.4 atm) and temperatures of 160—180°C with alkaline catalysts such as potassium hydroxide and potassium ethoxide. High molecular weight polymers of ethyl vinyl ether are used for pressure-sensitive adhesives, viscosity-index improvers, coatings and films lower molecular weight polymers are plasticizers and resin modifiers. 

Musumarra et al. [44] also identified miconazole and other drugs by principal components analysis of standardized thin-layer chromatographic data in four eluent systems and of retention indexes on SE 30. The principal component analysis of standardized R values in four eluents systems ethylacetate-methanol-30% ammonia (85 10 15), cyclohexane-toluene-diethylamine (65 25 10), ethylacetate-chloroform (50 50), and acetone with plates dipped in potassium hydroxide solution, and of gas chromatographic retention indexes in SE 30 for 277 compounds provided a two principal components model that explains 82% of the total variance. The scores plot allowed identification of unknowns or restriction of the range of inquiry to very few candidates. Comparison of these candidates with those selected from another principal components model derived from thin-layer chromatographic data only allowed identification of the drug in all the examined cases. 

Widespread medicinal use of colloidal bismuth subcitrate (CBS) has prompted extensive studies of bismuth compounds involving the citrate anion. Bismuth citrate is essentially insoluble in water, but a dramatic increase in solubility with increasing pH has been exploited as a bio-ready source of soluble bismuth, a material referred to as CBS. Formulation of these solutions is complicated by the variability of the bismuth anion stoichiometry, the presence of potassium and/ or ammonium cations, the susceptibility of bismuth to oxygenation to Bi=0, and the incorporation of water in isolated solids. Consequently, a variety of formulas are classified in the literature as CBS. Solids isolated from various, often ill-defined combinations of bismuth citrate, citric acid, potassium hydroxide, or ammonium hydroxide have been assigned formulas on the basis of elemental analysis data or by determination of water and ammonia content, but are of low significance in the absence of complementary data other than thermal analysis (163), infrared spectroscopy (163), or NMR spectroscopy (164). In this context, the Merck index lists the chemical formula of CBS as KgfNHJaBieOafOHMCeHsCbh in the 11th edition (165), but in the most recent edition provides a less precise name, tripotassium dicitrato bismuthate (166). 

E. Briner s formula for the index of refraction fi for the Z)-line for sodium hydroxide of cone, w grms. per litre, is p.=l-3334+0 fX)02694tti—0 000000289w2 and for potassium hydroxide, /t=l-3342- -0 0001866w—0-000000112to2. 

Incidents of several different types have arisen from reactions involving neutralisation of an acid with a base where the exotherm (57.3 kJ/equivalent for strong acid—strong base reactions) has not occurred smoothly over an extended period, but has been sudden in effect for various reasons. Individually indexed neutralisation incidents are f Formaldehyde, Magnesium carbonate hydroxide, 0415 Potassium hydroxide, Acids, 4422 Sodium carbonate, 0549 Sulfuric acid, 4-Methylpyridine, 4473 Sulfuric acid, Diethylamine, 4473 2,4,6-Trichloro-l,3,5-triazine, 2-Ethoxyethanol, 1035 See related UNIT process or unit operation incidents... 

In the review of Favorskii s studies (347) all reactions may be represented as doublet ones (potassium hydroxide playing the part of a catalyst). The review on catalytic condensation by Adikes and Dumont (346) is composed after the principle of doublet indexes, for example, condensation with interaction of the bonds C—H and C=0 may be represented by the following doublet pattern of the multiplet theory ... 

The protein solubility test (KOH) or nitrogen solubility index (NSI) is an indicator of solubility of protein in an alkaline solution of potassium hydroxide (KOH). It indicates the percentage of total nitrogen (protein) that is soluble. Protein solubility is important for tofii and soymilk production and for estimating the level of toasting or damage in soybean meal. Soybean meal should have a protein solubility index when... 

The neutralization or acid value (AV) of a lipid sample gives an indication of the unbound or free FA content. This is achieved by direct titration of the sample in an appropriate solvent with alkali (e.g., ISO 660 1996). The AV is defined as the number of milligrams of potassium hydroxide required to neutralize a 1-g sample. Although refined oils are largely devoid of free FA, considerable amounts may be present in crude oils. Their presence may be an index of oil purity. The degree of edibility of a fat is generally considered to be inversely proportional to the total amount of free FA. 

The free fatty acids content (acid value or acidity index) is the number of mg of potassium hydroxide required to neutralize the free fatty acids in 1 g of the eoeonut oil. 

Methylene iodide [75-11-6], CH2I2, also known as diio dome thane, mol wt 267.87, 94.76% I, mp 6.0°C, and bp 181°C, is a very heavy colorless Hquid. It has a density of 3.325 g/mL at 20°C and a refractive index of 1.7538 at 4°C. It darkens in contact with air, moisture, and light. Its solubiHty in water is 1.42 g/100 g H2O at 20°C it is soluble in alcohol, chloroform, ben2ene, and ether. Methylene iodide is prepared by reaction of sodium arsenite and iodoform with sodium hydroxide reaction of iodine, sodium ethoxide, and hydroiodic acid on iodoform the oxidation of iodoacetic acid with potassium persulfate and by reaction of potassium iodide and methylene chloride (124,125). Diiodoform is used for determining the density and refractive index of minerals. It is also used as a starting material in the manufacture of x-ray contrast media and other synthetic pharmaceuticals (qv). 

Natural malachite is a dark green crystalline solid monoclinic crystals density 4.0 g/cm refractive index 1.655 decomposes at 200°C insoluble in cold water and alcohols decomposes in hot water soluble in acids, ammonium hydroxide and potassium cyanide solutions. 

Black monoclinic or hexagonal crystals or powder density 4.6 g/cm refractive index 1.45 hardness 1.8 Mohs decomposes at 220°C insoluble in water, ethanol and aUtabs. Ksp 8.0xl(h34j soluble in nitric acid, ammonium hydroxide and potassium cyanide solutions also soluble in hot hydrochloric and sulfuric acids. 

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