from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A chemical compound containing four chlorine atoms per molecule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any chloride containing four chlorine atoms in each molecule
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any compound that contains four chlorine atoms per molecule
Sorry, no etymologies found.
Some may use solvents that the art conservation field has long since abandoned, such as benzene and carbon tetrachloride, which are proven carcinogens, or caustic soda otherwise known as lye.
Some carbon tetrachloride wafts up from inside landfills, says Kenneth Mitchell, chief of the EPA's air toxics program in its Southeast regional office in Atlanta.
Most of it, though, is probably left over from the past because carbon tetrachloride degrades so slowly, Mitchell says.
The largest single air emission source in 2007 was the DuPont Performance Elastomers plant in Beaumont, Texas, which reported 53,000 pounds of carbon tetrachloride emissions that year, according to the EPA inventory.
Carbon tetrachloride released into the air can be expected "to stick around about 50 years," he adds.
At these schools, arranged alphabetically by state, carbon tetrachloride exposures ranged from levels that could cause four to nine additional cancers per 1 million people based on a lifetime of exposure:
Despite all of these efforts to eliminate carbon tetrachloride — classified by the U.S.
She adds that since 2000 the plant has reduced its carbon tetrachloride emissions by 40% and now recycles more than 99% of the chemical.
"You'd put the stamp facedown in a little black tray, and put a few drops of carbon tetrachloride on," he says.
Then came what appeared to be the final blow: Thirteen years ago, carbon tetrachloride and other chemicals that were eating up the Earth's ozone layer were banned or restricted under the Montreal Protocol.