Fisher Scientific

Manufactured by A.G. fiir Clioinie-Apparatebau, Zurich G, Ottikerair. 24 also supplied by the Fisher Scientific Company. Model E 1 is recommended for general laboratory purposes. 

Made by Hathemware Ltd. for filter papers of 185 and 270 mm. diameter, t Supplied by the Fisher Scientific Company a product of the Coors Porcelain Company. 

A Laboratory Emergency Chart, which should be hung in a prominent position near the First Aid Box, is obtainable from the Fisher Scientific Company. 

Typical cells used in UV/Vis spectroscopy. Courtesy of Fisher Scientific. 

Hexanes, bp 6Q-59 C, certified by Fisher Scientific Company were... 

A.C.S. Reagent hydrochloric acid is purchased from Fisher Scientific Company, and used without further purification. 

TltaniLTi tetrachloride, purchased from Junsei Chemical Co., Ltd., is distilled before use. The checkers purchased titanium tetrachloride from the Fisher Scientific Company, and distilled it from copper powder before use. 

Reagent available from Fisher Scientific Company was used. 

Oertified AOS grade acetone purchased from Fisher Scientific Oompany was used as received. 

The hydriodic acid employed was a 56% aqueous solution preserved with 0.8% hypophosphorous acid obtained from Fisher Scientific Co. Once a bottle is opened, the contents tend to deteriorate, becoming dark-colored in less than 2 days. However, shelf life can be extended indefinitely if the container is purged with dry nitrogen before resealing. 

The checkers used a stirrer for vacuum work (Teflon bearing, Fisher Scientific Company). The submitters used a mercury-sealed stirrer. 

The submitters used sodium amide (obtained from Fluka A G as small lumps under kerosene) which was washed with anhydrous tetra-hydrofuran and ground with a mill. The checkers used freshly opened and recently purchased cans of sodium amide powder (Fisher Scientific Company) older reagent gave unsatisfactory results. 

Cinnamaldehyde dimethylacetal is prepared by the method used to prepare the corresponding diethylacetal. A mixture of 66.0 g. (0.5 mole) of Aldrich Chemical Company, Inc.), 100 g. (1.06 mole) of trimethyl orthoformate (Eastman Organic Chemicals), 450 ml. of anhydrous methanol (J. T. Baker Chemical Company), and 0.5 g. ofp-toluenesulfonic acid monohydrate (Fisher Scientific Company) is stirred at room temperature for 24 hours. At the end of this time the alcohol is removed with a rotary evaporator and the residue is distilled to give 81-83 g. (91-93%) of cinnamaldehyde dimethylacetal, b.p. 93—96° (0.2 mm.). 

Visit http //wwwl.fishersci.com/catalogs/. This site is the Fisher Scientific online catalogue. Once connected, double click on the Catalogue. Double click on the Fisher Chemical catalogue. Then select the alphabetical group containing your chemical s name or type in the product in the Search box. When you find the chemical of interest, scroll down and click on the MSDS icon found within the other product information for the chemical. 

Sodium alginate (Fisher Scientific, Manchester, UK) was prepared by dissolving 10 g of powder form in 500 ml of distilled water. A separate solution of 120 g of calcium chloride was dissolved in 21 of distilled water. Sodium alginate and calcium chloride solution were... 

Certain media components are susceptible to heat it is going to be denatured if it is heated. Therefore they must be added to the media after autoclaving. To do so, it is necessary to cany out filtration, the components using a 0.22 pm pore size filter that is appropriate to the solvent used. Filters are normally available from Whatman, or Fisher Scientific. It is recommended you consult filter experts or suppliers about the solvent and the special application you are intending to implement for the desired filters for die process. Normally filtration of... 

Throughout this preparation the submitters used reagent-grade materials distilled prior to use. The checkers used ACS reagent-grade benzene available from Fisher Scientific Company. 

An anhydrous spectral grade of nitromethane, obtained from Fisher Scientific Company, was used without purification. 

Commercial aniline from Fisher Scientific Company (purified-grade) was used as supplied. 

OH) (purchased from Fisher Scientific Company) and Amberlite IRA-400 (purchased from Mallinckrodt Chemical Works) were found to be satisfactory. Chloride-form resins must be converted to the hydroxide form before use, as described below (Note 7). 

The submitters used reagent-grade 2,4,6-tribromophenol. The checkers recrystallized the practical-grade reagent purchased from Fisher Scientific Company. The solvent used was Skelly B, and the melting point of the phenol, after recrystallization, was 93-95°. 

The methanol was distilled twice from magnesium turnings. Alternately, it was dried overnight over molecular sieves and then distilled. The checkers also found freshly opened reagent-grade methanol (purchased from Fisher Scientific Company) to be satisfactory. 

The submitters used R.P. bromine obtained from Prolabo, Paris without further purification. The checkers used bromine available from Fisher Scientific Company. 

Practical-grade hexanoic acid is obtainable from Matheson Coleman and Bell. The submitters report slightly higher yields using purified-grade hexanoic acid obtained from Fisher Scientific Company. 

Fisher Scientific Company (reagent-grade) or Matheson Coleman and Bell. The first two were slightly yellow, and the latter was colorless however, the yields of final product were identical with each brand. The excess thionyl chloride serves as a drying agent for the hexanoic acid and as a solvent for the IV-bromosuecinimide, which is not very soluble in carbon tetrachloride. 

Fisher Scientific Company Certified A.C.S. chloroform was used. The checkers used reagent-grade chloroform purchased from Wako Pure Chemical Industries, Ltd. 

Benzyltriethylammonium chloride is available from Fisher Scientific Company. The preparation of this reagent is described in Org. Syn., 55, 97 (1975). 

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