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Topic: Isopropanol


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In the News (Sun 17 Dec 17)

  
  Reduced flammability mixture based on isopropanol - Patent 5143652
A major disadvantage of isopropanol is its flammability and it is an object of the present invention to provide a means whereby its flammability is considerably reduced without adversely affecting its desirable properties.
It is necessary to specify the temperature a the solubility of the perfluoro-n-hexane in aqueous isopropanol rises with increasing temperature.
The superiority of mixtures in accordance with the invention is illustrated in Table 1, and the solubility of perfluoro-n-hexane in aqueous isopropanol at varying compositions and at various temperatures are given in the accompanying drawing.
www.freepatentsonline.com /5143652.html   (1275 words)

  
 DIPHENYLAMINE - (Organic Method #22)
Isopropanol was selected as the collection medium because DFA is very soluble in that solvent.
Two isopropanol bubblers were placed in series and 2 mg of DFA was added to the first bubbler.
The volume of isopropanol in each bubbler was maintained at 10 to 15 mL by adding pure HPLC grade isopropanol as required.
www.osha.gov /dts/sltc/methods/organic/org022/org022.html   (2479 words)

  
  Encyclopedia: Isopropanol   (Site not responding. Last check: 2007-09-27)
Isopropyl alcohol or isopropanol is a common name for 2-propanol, an alcohol commonly used for application to the skin, and popularly referred to as rubbing alcohol.
It is also used as a gasoline additive for dissolving water or ice in fuel lines.
Isopropyl alcohol, also known as isopropanol, is a colorless liquid with a somewhat unpleasant odor.
www.nationmaster.com /encyclopedia/Isopropanol   (288 words)

  
 Isopropanol (IARC Summary & Evaluation, Volume 71, 1999)   (Site not responding. Last check: 2007-09-27)
A slight increase in interstitial cell adenomas of the testis was observed in male rats.
Isopropanol is rapidly absorbed from the human gastrointestinal tract, whereas absorption through the skin is slow.
Isopropanol is a central nervous system depressant and prolonged inhalation exposure of rats can produce degenerative changes in the brain.
www.inchem.org /documents/iarc/vol71/039-isopropanol.html   (267 words)

  
 eMedicine - Toxicity, Alcohols : Article by Ann G Egland, MD
Approximately 20-50% of isopropanol is excreted unchanged by the kidney, while 50-80% is converted in the liver to acetone, which is a CNS depressant in its own right.
Isopropanol is a GI irritant that causes abdominal pain, nausea, vomiting, and gastritis with hematemesis.
Isopropanol toxicity also produces an elevated osmolal gap, but generally no abnormal anion gap, although this may be seen as a result of hypotension and lactic acidosis.
www.emedicine.com /emerg/topic19.htm   (4747 words)

  
 Developmental neurotoxicity evaluation of orally administered isopropanol in rats - Publication - RTI International
Isopropanol was administered by gavage to timed-mated rats from Gestation Day (GD) 6 through Postnatal Day (PND) 21.
In conclusion, there was no evidence of developmental neurotoxicity associated with isopropanol exposure as high as 1200 mg/kg/day.
Developmental neurotoxicity evaluation of orally administered isopropanol in rats.
www.rti.org /abstract.cfm?pubid=748   (343 words)

  
 Ethanol vs Isopropanol for DNA precipitation-Molecular Biology
The answer I received in summary is that less isopropanol is used allowing for a larger starting volume of precipitation, Isopropanol is less volatile, andsome salts are less soluble in isopropanol and will precipitate out with the DNA.
I guess this is why at most protocols you precipitate the DNA with isopropanol (witch will precipitate faster but a litle dressing with salt), and than make a wash with ethanol 70%, witch will clean some of the salt...
With Isopropanol, for larger DNA that is not necessary since the solubility of the DNA is not as great in isopropanol than ethanol.
www.protocol-online.org /archive/posts/3874.html   (2049 words)

  
 AllRefer.com - isopropanol (Organic Chemistry) - Encyclopedia   (Site not responding. Last check: 2007-09-27)
It is one of the cheapest alcohols and has replaced ethanol for many uses because of its similar solvent properties.
Isopropanol is made commercially by dissolving propylene gas in sulfuric acid and then hydrolyzing the sulfate ester that is formed; the propylene is a byproduct of petroleum refining.
Isopropanol was formerly obtained largely by catalytic reduction of acetone; oxidation of isopropanol is now the major source of acetone.
reference.allrefer.com /encyclopedia/I/isopropa.html   (200 words)

  
 isopropanol — FactMonster.com
It is one of the cheapest alcohols and has replaced ethanol for many uses because of its similar solvent properties.
Isopropanol is made commercially by dissolving propylene gas in sulfuric acid and then hydrolyzing the sulfate ester that is formed; the propylene is a byproduct of petroleum refining.
Isopropanol was formerly obtained largely by catalytic reduction of
www.factmonster.com /id/A0825637   (184 words)

  
 Champion-Expanding Encyclopedia
The properties and uses of methanol and isopropanol in modern chemical industry are discussed.
Both methanol and isopropanol's value in embalming and disinfection/sanitation are overviewed.
Methanol and isopropanol exposure during embalming is well within accepted safety standards and established limits of exposure.
www.champion-newera.com /encyclo.html   (2975 words)

  
 Isopropanol Overdose - Health Centers News Story - WEWS Cleveland
Isopropanol Overdose - Health Centers News Story - WEWS Cleveland
Isopropanol overdose is?poisoning from?swallowing isopropanol, a type of?non-drinking alcohol.
Note: This list may not be all inclusive.
www.newsnet5.com /encyclopedia/6863420/detail.html   (511 words)

  
 [No title]
Using isopropanol to precipitate plasmid DNA is supposed to help avoid contaminants that might interfere with enzymatic manipulations (cleavage, sequencing, etc.) The standard method (I think) is to have your DNA in 0.3M sodium acetate and add 0.6 volumes isopropanol (final 37.5%).
Q: Is it possible that the sodium acetate was diluted (into the organic phase) during the phenol extraction/chloroform:isoamyl extraction?
In this case, the sodium acetate would not have been 0.3M when I added isopropanol.
www.protocol-online.org /forums/index.php?showtopic=21669&view=new   (371 words)

  
 Spectrum Laboratories : Chemical Fact Sheet - Cas # 67630
Isopropanol will enter the environment as emissions from its manufacture and use as a
It naturally occurs as a plant volatile and is released during the microbial degradation of
When released into water, isopropanol will volatilize and biodegrade.
www.speclab.com /compound/c67630.htm   (556 words)

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