Search results
Results From The WOW.Com Content Network
In one study, BTEX (Benzene, toluene, ethylbenzene, xylenes) exposure during the first trimester of pregnancy has been clearly indicating negative association with biparietal brain diameter between 20 and 32 weeks of pregnancy. Women with high exposure to toluene had three to five times the miscarriage rate of those with low exposure, and women ...
The global market for diisocyanates in the year 2000 was 4.4 million tonnes, of which 61.3% was methylene diphenyl diisocyanate (MDI), 34.1% was toluene diisocyanate (TDI), 3.4% was the total for hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI), and 1.2% was the total for various others. [18]
Ethyl benzoate, C 9 H 10 O 2, is an ester formed by the condensation of benzoic acid and ethanol. It is a colorless liquid that is almost insoluble in water, but miscible with most organic solvents. As with many volatile esters, ethyl benzoate has a pleasant odor described as sweet, wintergreen, fruity, medicinal, cherry and grape. [1]
Ethyl 2-chloro-5-isocyanato-benzoate and ethyl 3-amino-4,4,4-trifluorocrotonate were reacted in the presence of a base to form a substituted urea intermediate which was cyclised to the pyrimidinedione, as shown. Further standard chemical transformations generated the final product.
[9] [10] Overdose of only a small number of capsules can be fatal. [10] Chewing or sucking on the capsule, releasing the drug into the mouth, can also lead to laryngospasm, bronchospasm, and circulatory collapse. [7] It is unclear if use in pregnancy or breastfeeding is safe. [11] Benzonatate is a local anesthetic and voltage-gated sodium ...
BZ is a white crystalline powder with a bitter taste. It is odorless and nonirritating with delayed symptoms several hours after contact. [2] [3] It is stable in most solvents, with a half-life of three to four weeks in moist air; even heat-producing munitions can disperse it.
PRL-8-53 is a nootropic substituted phenethylamine that has been shown to act as a hypermnesic drug in humans; it was first synthesized by medical chemistry professor Nikolaus Hansl at Creighton University in the 1970s as part of his work on amino ethyl meta benzoic acid esters.
Smoking during pregnancy is dangerous to the unborn baby and may cause pre-term birth, birth defects such as cleft lip or cleft palate, or miscarriage. [93] [80] Tobacco is the most commonly used substance among pregnant women, at 25%. [87] [94] Nicotine crosses the placenta and accumulates within fetal tissues.