Plastic storage containers

Suggest using plastic storage containers with snap-on lids or dean, dry glass jars with screw tops for needle disposal. 

To assess suitability of plastic storage containers for distribution of silver nitrate, behaviour under fire exposure conditions of various polymers in contact with the salt was examined. All polymers tested burned vigorously. 

Use. It is important to wear gloves and safety glasses and to work in a fume hood If you do not have all of these items for safe use of HF, do not use HF as a cleaning material Pour the diluted HF from its plastic storage container into a plastic soaking tank (like a polypropylene beaker). Let the glassware soak in the HF for anywhere from 30 seconds to two minutes. Rinse for at least one minute (or five full flushes) with water. Then rinse with distilled or deionized water. The HF can be reused many times until a decrease in effectiveness is obvious. 

To assess suitability of plastic storage containers for distribution of silver nitrate,... 

EXPOSURE ROUTES Inhalation (air in a newly painted room, air in a room with newly installed flooring) Ingestion (contaminated water, residue on food from plastic storage containers) kidney dialysis occupational exposure from factories that manufacture or use DEHP. 

It is not usual for unopened drums of nitrite-based chemical to degrade, and the product should remain in good condition for several years. However, it is possible for tannin-based corrosion inhibitors to degrade, even in unopened drums. Under warm conditions (such as storage in a boil-erhouse) and in the absence of a small amount of suitable microbiocide in the formulation, plastic drums containing tannin products may swell considerably because of microbiological degradation and gas formation. Care is needed to avoid accidents. 

Examples of these improvements are the packaging of dimethylamine products in plastic-lined containers and the elimination of sodium nitrite in the final product. This change in packaging and formulating makes it hi ly probable that N-dimethylnitrosamine will not form during storage of the product. Another example of the improvement of products is that Treflan products today contain less than 1 ppm of N-dipropylnitrosamine (T.) whereas some of the older products contained levels as high as 115-150 ppm several years ago (i, ). 

Worm bins can be purchased, or you can make your own—or adapt existing containers such as wooden crates or boxes, or a plastic storage bin. As worms like to feed near the surface, the most effective bins have a relatively large surface area. There is no need for the container to be "wormproof" the worms will stay put if the conditions are right for them. Good drainage is vital, as kitchen waste can produce... 

All organic esters are unstable in the presence of acid or base and nucleophiles such as water or alcohols. However, if stored anhydrous, they are stable. Storage vessels can be constructed of steel, aluminum, or other tneuillic materials, but plastic storage tanks are unsuitable because the highly lipophilic esters can sometimes permeate into the container boundary and sullen or even dissolve it. 

Paper cartons with an aluminum-foil barrier between the paper and plastic are used for the distribution of some chilled products. Because of the foil barrier, products in these cartons exhibit better ascorbic acid retention than do the plastic-lined cartons. As an example, grapefruit juice stored in such cartons retained 74% of its ascorbic acid over a 40-day storage period at 4.4°C. The rate of ascorbic acid loss was 0.7% per day. Grapefruit juice in a plastic-lined container lost 1.5% of its ascorbic acid per day when stored under similar conditions. 

Here s what those numbers and letters surrounded by the chasing-arrows symbol on the bottom of plastic bottles and other food storage containers mean. (If you can t find a number, call the manufacturer directly. On packaged food products, there is usually a toll-free question/comment number listed.) ... 

This method can also be used with chemicals which have been weighed on a scale. Weigh the chemicals in a plastic container, available from chemical supply houses, and simply immerse the entire container—don t pour. A dust mask should still be used while removing the powders from their storage containers. 

The purification of water has been treated exhaustively in the literature, and reviews have summarized general conclusions and recommended techniques for the ultrapurification and analysis of water.70,72 There is a general consensus among investigators that (1) water purified in quartz or plastic apparatus contains a lower level of cationic impurities than water purified in borosilicate or metal apparatus (2) storage of purified water for periods exceeding 30 days, even in plastic or Teflon containers, will result in an increase in cationic impurities and (3) resistivity measurements may be used as a survey technique but cannot be relied on for an unequivocal indication of water quality because they do not indicate nonionic impurities. 

The rapid diffusion of A -tetrahydrocannabinol into the plastic of containers and into the rubber stoppers normally used as closures for plasma vials (70 - 96%) and the significant binding to glass at low tetrahydrocannabinol concentrations (20 and 40% at 0.1 and 0.05 Ug/ml, respectively, in 50 ml volumetric flasks) definitely demand careful techniques in the handling, storage, and assay of this compound from aqueous and biological fluids. In fact, the results of any pertinent study where these conditions were not held in account should be quantitatively suspect. 

Samples are often acidified with a small amount of nitric or hydrochloric acid if to be used for trace metal determinations, and stored in plastic rather than glass vials to minimize the risk of adsorption losses. Storage containers should be acid washed and thoroughly rinsed with deionized water. Acidification may result in precipitation of naturally occurring dissolved organic matter, however. Speciation studies should be completed immediately after collection on fresh samples. 

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