Butyl, laboratory gloves

In addition to the standard laboratory protection, such as safety goggles and chemically resistant butyl rubber gloves, a personal HF gas monitor with audible alarm and a safety sensor for liquids, as described in Section 10.4, are commercially available [2], For detailed information about the toxic effects of HF, see references Fi5, Wa8 and Re4. 

Small Quantities. Wear butyl rubber gloves, laboratory coat, and eye protection. Work in the fume hood. Add bromine (5 mL) to a large quantity of water (1 L). Slowly add 10% sodium bisulfite (about 120 mL) until all color disappears. When reaction subsides, neutralize with sodium carbonate and wash into the drain. 

Wear butyl rubber gloves, eye protection, laboratory coat, large heavy face shield (if in doubt use body shield also), and self-contained breathing apparatus. Eliminate all sources of ignition and flammables. Cover the spill with a 1 1 1 mixture by weight of sodium... 

Wear butyl rubber gloves, laboratory coat, and eye protection. Work in the fume hood. 

Containers of dibutyl ether, which have been opened and are more than 1 year old, may contain hazardous quantities of peroxides. Especially if they have screw caps, containers should not be opened, and should be disposed of by the appropriate authorities. When the container can be opened safely, check for peroxides as follows Wear butyl rubber gloves, laboratory coat, and eye protection. Work in the fume hood. Dissolve 100 mg of potassium iodide in 1 mL of glacial acetic acid. Add to 1 mL of the dibutyl ether. A pale yellow color indicates a low concentration (0.001-0.005%) and a bright yellow or brown color a high concentration (above 0.01% and hazardous) of peroxide in the sample.9... 

Wear butyl rubber gloves, protective laboratory coat, eye protection, self-contained breathing apparatus, and protective shoes. 

Small Quantities. Wear butyl rubber gloves, laboratory coat, and eye protection. Work in the fume hood. To a 50-mL, three-necked, round-bottom flask equipped with stirrer, thermometer, and dropping funnel, add 1 mL of water, 3 mL of concentrated hydrochloric acid, and 2 g (0.008 mol) of 3,3 -dichlorobenzidine. The temperature is maintained at -5 to OX by a cooling bath, while 0.2 g (0.0084 mol) of 97% sodium nitrite dissolved in 1.4 mL of water is added dropwise to the solution or slurry of dichlorobenzidine hydrochloride. Stirring is continued an additional 30 minutes after addition is complete. While maintaining the temperature at -5 to 0°C, 16.6 mL (0.16... 

Eliminate all sources of ignition. Wear butyl rubber gloves, large and heavy face shield, goggles, and laboratory coat. Cover spill with dry sand. Scoop into a container and transfer to the fume hood. Decompose by cautious addition of dry butanol (40 mol butanol to 1 mol hydride or 26 mL/g hydride) until reaction ceases. Slowly add mixture to a pail of cold water. Let stand for 24 hours. Neutralize with 6 M hydrochloric acid (cautiously add concentrated acid to an equal volume of cold water). Decant the solution to the drain. Treat the solid residue as normal refuse.4 5... 

Small Quantities. Wear eye protection, butyl rubber gloves,10 and laboratory coat. Work in the fume hood. For each 1 mL of dimethylformamide, add 10 mL of 10% sodium hydroxide solution. Heat the mixture under reflux for 30 minutes, or allow to stand at room temperature for 48 hours. Wash the liquid into the drain.10... 

To remove peroxides, wear butyl rubber gloves, laboratory coat, and eye protection. Pour the dioxane (100 mL) into a separatory funnel and shake with a freshly prepared 50% aqueous solution of sodium metabisulfite (20 mL) for 3 minutes. Release the pressure in the funnel at 10-second intervals. Separate the aqueous layer. Retest the dioxane for the continued presence of small amounts of dialkyl peroxides that are not reduced by the metabisulfite treatment. If peroxides are absent, the dioxane can be dried for reuse or packaged for disposal by burning. If peroxides are still present, in the fume hood, place the ether in a 250-mL round-bottom flask equipped with a condenser, and add a solution of 100 mg of potassium iodide in 5 mL of glacial acetic acid and 1 drop of concentrated hydrochloric acid. Reflux gently for 1 hour. Package the ether for disposal by burning.13... 

Keep stock of all azides very low. Stamp date and receipt on package. Wear butyl rubber gloves, eye protection, and laboratory coat. In the fume hood and behind a safety shield, add the azide to 6 M hydrochloric acid (cautiously add a volume of concentrated acid to an equal volume of cold water 150 mL for each 1 g of azide). While stirring, add granular tin (10 g for each 1 g of azide). Continue stirring at room temperature for 30 minutes. Decant or filter the solution into a pail of cold water. Neutralize with sodium carbonate and pour into the drain with at least 50 times its volume of water. Reuse the excess tin or discard as normal refuse.2... 

Shut off all possible sources of ignition. Wear face shield and goggles, laboratory coat, and butyl rubber gloves.8 Cover spill with a 1 1 1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite), and sand. Scoop into a container and transport to the fume hood. Add the mixture to cold water (about 10 mL for each 1 mL of formaldehyde solution). Slowly add household bleach (25 mL of household bleach for each 1 mL of formaldehyde solution). Allow to stand at room temperature for 20 minutes. Decant liquid to drain. Discard solid residue as normal refuse.9... 

Small Quantities. Wear butyl rubber gloves,8 laboratory coat, and eye protection. In the fume hood, while stirring, slowly add diluted formaldehyde (about 10 mL water for each 1 mL of formaldehyde) to an excess of household bleach (25 mL household bleach for each 1 mL of formaldehyde). Stir for 20 minutes, and then wash the solution into the drain.9... 

Small Quantities. Wear butyl rubber gloves,10 laboratory coat, and eye protection. Work in the fume hood. Prepare a dilute (5%) aqueous solution of hydrazine by adding slowly to the appropriate volume of water. For each 1 g of hydrazine, place 120 mL (about 25% excess) of household laundry bleach (containing 5.25% sodium hypochlorite) into a three-necked, round-bottom flask equipped with a stirrer, thermometer, and dropping funnel. Add the aqueous hydrazine dropwise to the stirred hypochlorite solution at such a rate that the temperature is maintained at 45-50oC. The addition takes about 1 hour. Stirring is continued overnight (at least 12 hours). Wash the reaction mixture into the drain.12,13... 

Wear butyl rubber gloves, self-contained breathing apparatus, eye protection, and a laboratory coat. In the fume hood, slowly add the hydrofluoric acid to a plastic pail of cold water (at least a 1 10 dilution of acid to water is suggested). Add excess calcium carbonate or calcium hydroxide. Let the precipitate settle for 24 hours. Decant the solution to the drain. Allow the solid residue (calcium fluoride) to dry and package for disposal in accordance with local regulations.7,8... 

Wear butyl rubber gloves, eye protection, and laboratory coat. A body shield should be available. In the fume hood, prepare a dilute solution (5%) of peroxide by cautiously adding to a large volume of water. Gradually, while stirring, add to a 50% excess of aqueous sodium metabisulfite in a round-bottom flask equipped with a thermometer. An increase in temperature indicates that reaction is taking place. Acidify the reaction if it does not proceed spontaneously. Neutralize the reaction mixture and wash into the drain.25-27... 

Instruct others to maintain a safe distance. Wear face shield and goggles, laboratory coat, and butyl rubber gloves. Cover the spill with dry sand. Scoop the resulting mixture into a pail and, in the fume hood, slowly add to an excess of butanol (10 mol l mol, 24 mL/g hydride). When the reaction is complete, dilute with water, and allow the solids to settle. Flush the solution down the drain with at least 50 times its volume of water. The solid residue may be discarded with normal refuse.16... 

Reaction Mixtures. Wear butyl rubber gloves, laboratory coat, and eye protection. In the fume hood behind a shield, cautiously and slowly carry out the following procedure. Treat the stirred reaction mixture from n grams of lithium aluminum hydride by successive dropwise addition of n mL of H20, n mL of 15% sodium hydroxide solution and 3n mL of H20. This produces a granular precipitate that is removed by filtration and treated as normal refuse. Wash the filtrate into drain.17... 

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