Ethers tests

In the case of a secondary base, the above treatmemt with hydrochloric acid and sodium nitrite will give an insoluble nitrosaminc (licpiid or solid), which is frcc(ueutly 3 cllow. It may be separated by ether tind, after removing the ether, tested l y Liebermann s nitroso-reaction (sec Reaction 3, p. 159). Niti Sus. acid has no action on tertiary aliphatic amines, hut fornrs nitroso-... 

A sample of the readily peroxidisable allyl ether, tested with a peroxide test strip gave a negative test result, so was charged into a distillation apparatus, but there was a detonation during distillation. It was recommended that an additional test (potassium iodide-acetic acid) should be used unless it is certain that the test strips will give a positive result with a particular peroxide-containing liquid. 

Respiratory Effects. Hexane was one of 16 industrial solvents (hydrocarbons, alcohols, ketones, esters, and ethyl ether) tested for irritation potential on an average of 10 volunteers of mixed sexes for 3-5 minutes in an inhalation chamber (Nelson et al. 1943). The purity and the isomer composition of the hexane was not specified. Hexane was the only one of the 16 solvents which caused no irritation to the eyes, nose, or throat at the highest concentration tested (500 ppm). No odor was reported. 

Reproductive toxicity of ethylene glycol monoethyl ether tested by continuous breeding of CD-I mice. Environ Health Perspect 57 85-90, 1984... 

Hydrazoic acid is a volatile, endothermic liquid of unbearably acrid odor. Some of its properties are given in Table 18. Hydrazoic acid and its salts are very toxic. Inhalation of small quantities causes the blood pressure to drop and damages the mucous membranes. Exposure to HN3 vapors can be recognized by reddening of the eyes. Pure, liquid hydrazoic acid is very sensitive and explodes with slight mechanical stress. It is completely miscible with water and soluble in alcohols and ethers. Tests have shown that aqueous solutions with less than 20% hydrazoic acid do not detonate. Diethylether, which has almost the same boiling point (307.7 K) as HN3 can be used as a blanketing fluid. 

Several simple p-alkylphenyl ethers of geraniol epoxide have been found to possess juvenile hormone activity. The p-ethylphenyl ether, tested on the yellow... 

Reaction Sequence A 100 mL of a 1C % aqueous solution of KI are placed in each Erlenmeyer flask. 100 ml, of chlorine water are added to one flask, 100 mL of bromine water to the other in both cases the solution immediately turns brown. The contents of the two flasks are now transferred to the five large test tubes, to which the following substances are added test tube 1, freshly pre pared starch solution test tube 2, a few grams of solid KI test tube 3, diethyl ether test tube 4, toluene test tube 5, -hcxanc (or -hcptanc). The contents of the first test tube turn to a deep blue-black, while the brown color in the second becomes much deeper. In the other test tubes two layers are formed in each case the lower aqueous layer is much lighter in color, while the upper organic layer.s arc colored yellow(test tube 3), wine-red (test tube 4) and violet (test tube 5) respectively. 

All of these methods identify mutations that disturb the formation of spores severely, showing defects in either entry into meiosis, meiotic chromosome behavior, or spore morphogenesis (and, for the ether test, germination). As with any good mutant hunt, secondary screens to identify mutants specifically defective in a particular aspect of meiosis must be established. For instance, ether sensitivity could reflect spore inviability due to chromosome missegregation or could be due to defects in spore wall assembly. Direct spore dissection of candidate mutants can distinguish between these two possibilities. 

From the three ethers tested PEG appears to be the most soft one and it should give non-clotting surfaces whenever rendered into a non dissolving amorphous network. 

Anong the bicyclic crown ethers tested, [2.2.1]-cryptate was the most effective, giving rates and molecular weights similar to that obtained with 18-crown-6 (Table XI). 

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