Methyl ketones INDEX

Properties M.w. 184.31 sp.gr. 0.993-0.997 b.p. 95-97 C (13 mm Hg) ref. index 1.579 Toxicology TSCA listed Uses Reducing agent for prep, of silyl-substituted alkylidene complexes of tantalum, in ionic reduction of enones to sat. ketones, in reductive cyclization of unsat. ketones, for esters in presence of zinc hydride catalyst, for o-halo ketones in presence of Mo(0), reduction of thio esters to ethers, esters to alcohols with Rh catalysis, in assym. reduction of methyl ketones, reductive cleaving of allyl acetates Manuf./Distrib. ABCR http //www.abcr.de, Alfa Aesar http //www.aifa.com-. Digital Spec. Chems. http //www.digHaichem.com, Fluorochem USA... 

Detectability may be a significant problem with homologous series of unsaturated compounds, particularly //-alkanes. For these compounds, refractive index detection or evaporative light-scattering, both of which are described elsewhere in the book, may be of use. Indirect photometry is a useful detection scheme for compounds that do not absorb in the UV. Acetone, methylethyl ketone, methyl propyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, and acetophenone are added to an acetonitrile/water mobile phase, generating a negative vacancy peak when the nonchro-mophoric analyte emerges and a positive peak if the ketone is adsorbed and displaced.70 Dodecyl, tetradecyl, cetyl, and stearyl alcohols also have been derivatized with 2-(4-carboxyphenyl)-5,6-dimethylbenzimidazole and the derivatives separated on Zorbax ODS in a mobile phase of methanol and 2-propanol.71... 

Fig. 56. Dependence of specific refractive index increment on conversion of monomers to polymer for a styrene/acrylonitrile/methyl methacrylate terpolymer in methyl ethyl ketone at 20 °C and 436 nm. (a) - partial azeotrope, (b) terpolymer with composition distribution163 ...

Furby (12) has developed a method for evaluating stocks in the lubricating oil range that results in a breakdown of components into asphaltenes, resins, wax, and dewaxed oil and provides a yield-viscosity index relationship for the dewaxed oil. The author has found such analyses very useful and inexpensive for evaluating a large number of potential lubricating oil stocks. Furby s method utilizes petroleum ether to precipitate asphaltenes, a fuller s earth-petroleum ether fractionation to isolate resins, methyl ethyl ketone-benzene dewaxing on the deasphalted-deresinified material to separate wax, and an adsorption fractionation to provide cuts from which the yield-viscosity index relationship for dewaxed, solvent-refined oil is obtained. 

Riggio, R., et al., Viscosities, Densities, and Refractive Indexes of Mixtures of Methyl Isobutyl Ketone-Isobutyl Alcohol. J. Chem. Eng. Data, 1984 29, 11-13. 

Capello et al.16 applied LCA to 26 organic solvents (acetic acid, acetone, acetonitrile, butanol, butyl acetate, cyclohexane, cyclohexanone, diethyl ether, dioxane, dimethylformamide, ethanol, ethyl acetate, ethyl benzene, formaldehyde, formic acid, heptane, hexane, methyl ethyl ketone, methanol, methyl acetate, pentane, n- and isopropanol, tetrahydrofuran, toluene, and xylene). They applied the EHS Excel Tool36 to identify potential hazards resulting from the application of these substances. It was used to assess these compounds with respect to nine effect categories release potential, fire/explosion, reaction/decomposition, acute toxicity, irritation, chronic toxicity, persistency, air hazard, and water hazard. For each effect category, an index between zero and one was calculated, resulting in an overall score between zero and nine for each chemical. Figure 18.12 shows the life cycle model used by Capello et al.16... 

Ref. Index revised. FEMA No. 2731 Methyl Isobutyl Ketone... 

We have examined experimentally the response of the light-scattering instrument to scattering using the same polystyrene standards in solvents of different index of refraction. We made a series of measurements on two polystyrene standards (Millipore nominal = 8500, P/N 25171, Lot 80314 and Waters nominal = 110,000, P/N 41995, Lot 70111) dissolved in five solvents [acetone, methyl ethyl ketone (MEK), tetrahydro-naphthalene, THE, and toluene]. 

Properties Yellow solid or liquid. D 1.2458 (30/ 4C), mp 29-30C, refr index 1.4893 (42C). Insoluble in water soluble in alcohols, ketones, aromatic and chlorinated hydrocarbons. Also available as methyl ester. 

Properties White, crystalline solid. Fp 70C, bp 265C, d 1.048 (20/4C), viscosity 3.47 centistokes (0C), 1.54 centistokes (120C), refr index 1.4859 (75C), flash p 275F (135C) (COC). Soluble in methanol, ethanol, isopropanol, Cellosolve (12C), naphtha, benzene, methyl ethyl ketone, and linseed oil insoluble in water and 10% sodium hydroxide. Combustible. 

Properties Water-white liquid. The commercial material consists of a mixture of methyl propyl and diethyl ketones in the approximate ratio of 3 1 and contains at least 97% of these ketones, the balance being sec-amyl alcohol. D 0.809 (20/20C), fp -77.5C,bp 101.7C, refr index 1.3895 (20C), viscosity 0.473 cP (25C), flash p 45F (7.22C), autoign temp 941F (505C). Soluble in alcohol and ether slightly soluble in water. 

Properties Liquid. Bp 68C, fp -23C, refr index 1.474, d 1.22, dipole moment 1.98 (D). The polymer is soluble in toluene, chloroform, and methyl ethyl ketone and has dielectric constant of 2.56. Nonflammable. 

In this project, distinguishing properties of the 10 organic liquids should be observed (Part A) and unknowns subsequently identified (Part B) according to an SOP which I wrote for this. The properties are (1) water miscibility, (2) density, (3) viscosity, (4) refractive index, and (5) odor. The 10 organic liquids are acetone, methanol, ethanol, isopropyl alcohol, heptane, cyclohexane, toluene, methyl ethyl ketone, butanol, and ethyl acetate. 

According to the Merck Index - Clove oil, 82-85% eugenol, including about 10% acetyl eugenol, caryophyllene, small quantities of furfural, vanillin, and methyl ethyl ketone. 

Q and C2 in Pa. Mooney-Rivlin Equation constants. For the equation, see Ferry (1980). Weight swelling index measured in methyl ethyl ketone at 25° C. 

Modification of the C-9 ketone has been successfully accomplished in several ways. Conversion of the ketone to simple oximes was known to diminish intramolecular cyclization, but this transformation also reduced antibiotic activity. In order to increase antimicrobial activity, an expanded series of oximes was synthesized by 0-alkylation of the oxime of erythromycin with alkyl halides and base in aprotic solvents [29]. From evaluation of this series, roxithromycin, the 9-[0-(2-methoxyethoxy)methyl]oxime (see Fig. 4), was selected as the derivative with the best therapeutic index [29]. Roxithromycin has now been introduced in France as a new antibiotic. 

TABLE IIL Environmental Indexes for Methyl Ethyl Ketone (ME and the... 

Cyclohexanone diethyl ketal. See Cyclohexanone diethyl acetal Cyclohexanone, [(3,3-dimethylbicyclo [2.2.1] hept-2-yl) methyl]-2-methyl-CAS 68901-22-4 Classification Polycyclic ketone Properties Coioriess to yel. iiq. sp.gr. 0.977-0.985 (20/4 C) ref. index 1.496-1.501 Uses Fragrance in cosmetics, household prods. 

Ethyl (E)-2-methyl-2-butenoate Ethyl trans-2-methyl-2-butenoate. See Ethyl tiglate Ethyl 2-methylbutyl ketone. See Methylheptanone Ethyl 2-methyl butyrate CAS 7452-79-1 EINECS/ELINCS 231-225-4 FEMA 2443 Empirical C7H14O2 Formula CH3CH2CH(CH3)COOC2Hs Properties Colorless llq. powerful green fruity pungent odor sol. in alcohol, propylene glycol misc. with fixed oils very si. sol. in water m.w. 130.19 dens. 0.868 (20/4 C) b.p. 130-133 C flash pt. 26 C ref. index 1.397 (20 C)... 

CAS 89-82-7 EINECS/ELINCS 201-943-2 Synonyms Cyclohexanone, 5-methyl-2-(1-methylethylidene)-, (R)- (R)-2-lsopropylidene-5-methylcyclohexanone (R)-(+)-p-Menth-4(8)-en-3-one (R)-p-Menth-4(8)-en-3-one (R)-5-Methyl-2-(1-methylethylidene) cyclohexanone Pulegon Pulegone (+)-Pulegone (+)-(R)-Pulegone (R)-(+)-Pulegone Classification Nonaromatic ketone Definition Ketone found in pennyroyal and dedeoma oil Empirical CioHieO Properties Oily liq. pleasant odor of peppermint/camphor misc. with alcohol, ether, chloroform pract. insol. in water m.w. 152.26 dens. 0.936 b.p. 224 C flash pt. 185 F ref. index 1.4870... 

Many cellulose derivatives form lyotropic liquid crystals in suitable solvents and several thermotropic cellulose derivatives have been reported (1-3) Cellulosic liquid crystalline systems reported prior to early 1982 have been tabulated (1). Since then, some new substituted cellulosic derivatives which form thermotropic cholesteric phases have been prepared (4), and much effort has been devoted to investigating the previously-reported systems. Anisotropic solutions of cellulose acetate and triacetate in tri-fluoroacetic acid have attracted the attention of several groups. Chiroptical properties (5,6), refractive index (7), phase boundaries (8), nuclear magnetic resonance spectra (9,10) and differential scanning calorimetry (11,12) have been reported for this system. However, trifluoroacetic acid causes degradation of cellulosic polymers this calls into question some of the physical measurements on these mesophases, because time is required for the mesophase solutions to achieve their equilibrium order. Mixtures of trifluoroacetic acid with chlorinated solvents have been employed to minimize this problem (13), and anisotropic solutions of cellulose acetate and triacetate in other solvents have been examined (14,15). The mesophase formed by (hydroxypropyl)cellulose (HPC) in water (16) is stable and easy to handle, and has thus attracted further attention (10,11,17-19), as has the thermotropic mesophase of HPC (20). Detailed studies of mesophase formation and chain rigidity for HPC in dimethyl acetamide (21) and for the benzoic acid ester of HPC in acetone and benzene (22) have been published. Anisotropic solutions of methylol cellulose in dimethyl sulfoxide (23) and of cellulose in dimethyl acetamide/ LiCl (24) were reported. Cellulose tricarbanilate in methyl ethyl ketone forms a liquid crystalline solution (25) with optical properties which are quite distinct from those of previously reported cholesteric cellulosic mesophases (26). 

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