Monosulfate

Derivatives of ubiquiaones are antioxidants for foodstuffs and vitamins (qv) (217,218). Ubichromenol phosphates show antiinflammatory activity (219). Chroman o1 compounds inhibit oxidation of fats and can be used ia treatment of macrocytic anemias (220). Monosulfate salts of 2,3-dimethoxy-5-methyl-6-substitutedhydroquiaone have been reported to be inhibitors of Hpid oxidation ia rats (221). Polymers based on chloranilic and bromanilic acid have been prepared and contain oxygenated quiaones (63), which are derived from 1,2,3,4-benzenetetrol (222). 

The reactions in the regulated-set cements containing Cjj A3CF2 (note mixed notation) as a principal phase resemble those in ordinary Portiand cements. Initial reaction rates are controlled by ettringite formation. Setting occurs with formation of the monosulfate, along with some transitory lower-limed calcium aluminate hydrates that convert to the monosulfate within a few hours. 

PhB(OH)2, PhH or Pyr. A polymeric version of the phenyl boronate has been developed.Phenyl boronates are stable to the conditions of stannyla-tion and have been used for selective sulfation to produce monosulfated monosaccharides. Phenyl boronates were found to be stable to oxidation with pcc ... 

Preparation of the Monosulfate Salt of 1-[L-(-l-y-Amino-a-HydroxybutyrylJKanamycin A One mol of 1-[L-(-)-7-amino-o-hydroxybutyryl] kanamycin A is dissolved in 1 to 3 liters of water. The solution is filtered to remove any undissolved solids. To the chilled and stirred solution is added one mol of sulfuric acid dissolved in 500 ml of water. The mixture is allowed to stir for 30 minutes, following which cold ethanol Is added to the mixture till precipitation occurs. The solids are collected by filtration and are determined to be the desired monosulfate salt. 

The column was then eluted with 0.0025N sulfuric acid in methanol-water mixture (1 1 v/v). A total of 900 ml of fractions containing a substance which showed UV absorption at 290 m/u was collected. After removal of methanol by distillation, the residual liquid was adjusted to pH 6.0 with Dowex 44 (OH type) and freeze-dried to obtain 9.3 g (95% yield) of NK631 monosulfate (copper-free form) in the form of pale yellowish-white amorphous powder. 

To gain an insight into the likely hydrolytic behavior of sulfated simple sugars and polysaccharides, Brimacombe, Foster, Hancock, Overend, and Stacey carried out a rigorous set of experiments with the cyclic sulfates of cyclohexane cis-and trims-1,2-diol as model compounds. The results were interpreted on the reasonable assumption that, in all cases, the cyclic sulfates initially afford a diol monosulfate. Examples of both S-0 and C-0 bond cleavage were encountered. A qualitative reaction mechanism was proposed for use as a working hypothesis for the hydrolysis of sugar sulfates. 

The experiments above are rather easy to carry out and should always be part of a preformulation program, since hygroscopicity can be so important that it will dictate whether or not a particular salt should be used. Dalmane, for instance, is a monosulfate and is used as such since the disulfate, desirable in many other respects, is so hygroscopic that it will remove water from a hard-shell capsule and make it exceedingly brittle. 

Surface disinfectants Compounds containing phenolics, chlorhexidine, potassium peroxy-monosulfate, hypochlorites such as household bleach, and iodine/iodophores. Other disinfectants like alcohols and quaternary ammonium salts will work but are less effective. 

It is noteworthy that quick and effective formation of diaryl nitrones can be achieved through oxidation of diaryl imines with Oxone (potassium peroxy-monosulfate) in such media as aqueous solution of NaHCC>3 in acetonitrile or acetone. When oxidized under such conditions, dialkyl or monoaryl imines give oxaziridines (17). Oxidation of 3,4-dihydroisoquinoline (9) with Oxone initially leads to the formation of oxaziridine (10) which is easily transformed into the corresponding 3,4-dihydroisoquinoline A-oxide (11) upon treatment with catalytic amounts of p-toluenesulfonic acid (Scheme 2.4) (18). 

Alkali aluminate (5-calcium disilicate monosulfate), phase in Portland cement clinker, 5 472t Alkali aluminate (8-calcium disodium trialuminate), phase in Portland cement clinker, 5 472t Alkali belite, phase in Portland cement clinker, 5 472t Alkali blue toners, 14 318 Alkali borate glasses, 12 572, 573, 584 Alkali catalysed pad-dry-bake procedure, 9 485... 

Calcium cyanamid process, for ammonia synthesis, 11 114, 115 Calcium cyanide, 8 194-197 Calcium cyanide diammoniate, 8 195 Calcium dichromate, molecular formula, properties, and uses, 6 561t 5-Calcium disilicate monosulfate, phase in Portland cement clinker, 5 472t 5-Calcium disilicate monocarbonate, phase in Portland cement clinker, 5 472t Calcium disilicide, 4 530 8-Calcium disodium trialuminate, phase in Portland cement clinker, 5 472t Calcium doping, 23 842-844 Calcium P-alumina, 2 406t Calcium ethylenediaminetetraacetate, 7 596t... 

Tetracalcium aluminate hydrate, 5 477t Tetracalcium aluminate monosulfate, 10,8,x-hydrate, 5 479t 12-hydrate, 5 479t... 

Synonyms AI3-52118 BRN 0635994 CCRIS 265 Dimethoxysulfone Dimethyl monosulfate Dimethyl sulphate DMS Methyl sulfate EINECS 201-058-1 NSC 56194 RCRA waste number U103 Sulfuric acid, dimethyl ester UN 1595. 

Dimethyl monosulfate, see Dimethyl sulfate Dimethylnitromethane, see 2-Nitropropane Dimethylnitrosamine, see TV-Nitrosodimethylamine TV-Dimethylnitrosamine, see TV-Nitrosodimethylamine 7V,7V-Dimethylnitrosamine, see TV-Nitrosodimethylamine Dimethylnitrosomine, see TV-Nitrosodimethylamine 2-(2,2-Dimethyl-l-oxopropyl)-l//-indene-l,3(2Efl -dione, see Pindone... 

Calcium aluminate monosulfate hydrate CaNH4P04-8H20 Calcium sulfate hemihydrate CaS04 CaS04-2H20... 

Synonyms Diethyl monosulfate ethyl sulfate sulfuric acid diethyl ester diethyl tetraoxosulfate... 

Nickel monosulfate nickelous sulfate nickel(II) sulfate nickel(Il) salt... 

In this final peak, the remaining tricalcium aluminate reacts with both gypsum and water to form ettringite and subsequently the tricalcium aluminate monosulfate. C3A hydrates formed are of varying composition but... 

Table 2.2 Amounts of ettringite and monosulfate hydrate formed in the C3A-CaS04. 2H2O system...

Addition of dampproofers based on caprylic, capric or stearic acids, stearates or wax emulsions do not have any effect on the setting characteristics of hydration products of Portland cement. However, the unsaturated fatty acid salts, such as oleates, although not affecting the tricalcium silicate hydration, have a marked effect on the ettringite and monosulfate reaction [12] and this is illustrated in the isothermal calorimetry results in Fig. 4.4. It is possible that a calcium oleoaluminate hydrate complex is formed involving the double bond of the oleic acid. 

The subsequent conversion of the ettringite to monosulfate by reaction with C3A is also accelerated by TEA. 

Larger particle size ensures that the potential expansion due to hydration is extended over a period of time. Chemical and physical properties of the most widely used proprietary product, Denka CSA, are given in Table 6.10 [74]. Other CSAs include mixtures of C4 ASHj2 and 2 CS (monosulfate and gypsum) and mixtures of Type... 

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