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Topic: Acetic acid


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In the News (Wed 20 Mar 19)

  
  Acetic acid - Wikipedia, the free encyclopedia
Acetic acid is corrosive, and its vapour is irritating to eyes and nose, although it is a weak acid based on its ability to dissociate in aqueous solutions.
Acetic acid is also a component of the vaginal lubrication of humans and other primates, where it appears to serve as a mild antibacterial agent.
Equivalently, acetic acid is used as a spray-on preservative for livestock silage, to discourage bacterial and fungal growth.
en.wikipedia.org /wiki/Acetic_acid   (3820 words)

  
 Acetic acid bacteria - Wikipedia, the free encyclopedia
Acetic acid bacteria are bacteria that derive their energy from the oxidation of ethanol to acetic acid during respiration.
The acetic acid bacteria are found in nature where ethanol is being formed as a result of yeast fermentation of sugars and plant carbohydrates.
In these liquids the acetic acid bacteria grow as a surface film due to their aerobic nature and active motility.
en.wikipedia.org /wiki/Acetic_acid_bacteria   (214 words)

  
 Acetic acid kidney dialysis   (Site not responding. Last check: 2007-10-21)
Acetic acid was reported in groundwater at a concn of 43 ug/l in a shallow coastal plain aquifer near Atlantic City, NJ in 1990(5).
Acetic acid was detected in leachate from a sanitary landfill in Barcelona, Spain(4).
Acetic acid was identified in the emissions from rubberized jute cushions at unreported concns(9).
www.dialysisethics.org /fyi/humanstudies.htm   (14851 words)

  
 Chemical of the Week -- Acetic Acid and Acetic Anhydride
Acetic acid is the chemical compound responsible for the characteristic odor and sour taste of vinegar.
Acetic anhydride is a clear, colorless, mobile (free-flowing) liquid with a sharp odor similar to that of acetic acid.
Acetic anhydride melts at —73°C, boils at 139°C, and has a density of 1.080 g/mL at 15°C. It is flammable with a flash point of 54°C. This compound is readily combustible and represents a fire hazard.
scifun.chem.wisc.edu /chemweek/AceticAcid/AceticAcid.html   (926 words)

  
 AllRefer.com - acetic acid (Organic Chemistry) - Encyclopedia
acetic acid[usE´tik] Pronunciation Key, CH H, colorless liquid that has a characteristic pungent odor, boils at 118°C, and is miscible with water in all proportions; it is a weak organic carboxylic acid (see carboxyl group).
Acetic acid is the major acid in vinegar; as such, it is widely used as a food preservative and condiment.
For industrial use concentrated acetic acid is prepared from the oxidation of acetaldehyde.
reference.allrefer.com /encyclopedia/A/aceticac.html   (280 words)

  
 Acetic Acid   (Site not responding. Last check: 2007-10-21)
Acetic acid is the sharp tasting and main constituent of vinegar.
Acetic acid is produced by acetic acid bacteria (acetobacter), which are introduced to grape juice and wine by vinegar flies or pre-contaminated equipment or cooperage.
Acetic acid is often, but not necessarily, accompanied by the negative aromas and taste of ethyll acetate (nail polish remover odour).
www.monashscientific.com.au /AceticAcid.htm   (185 words)

  
 The Recovery of Acetic by Liquid-Liquid Extraction
Acetic acid is one of the most widely used carboxylic acids, It is used in many reactions, for example, the synthesis of acetic esters, or it can be used as a solvent, for example, in the manufacture of cellulose acetate or pharmaceutical products.
Acetic acid is extracted from water by a suitable solvent in order to obtain substantially pure acetic acid.
Recovery of the highest concentration acetic acid is only possible if the feed to the rectification stage lies on the line between the azeotrope point AZ and pure acetic acid E. On the other hand, since the point should also lie on the ternary equilibrium curve, only the point SA corresponds to these conditions.
www.ddpsinc.com /ProcessProfiles/pp50.html   (1088 words)

  
 ACETIC ACID (Partially Validated #2119)
Acetic acid is a severe skin, eye and mucous membrane irritant.
Acetic acid is used as a feedstock in the production of acetates, acetyls, cellulose acetate, acetate rayon, and plastics.
Butyric acid, as the butyrate ion, is an interference on the AS4A analytical column, therefore an AS14A analytical column should be used to analyze samples from workplaces where butyric acid is present.
www.osha.gov /dts/sltc/methods/partial/pv2119/pv2119.html   (2385 words)

  
 Acetic Acid Price Report - Chemical pricing information - ICIS Pricing   (Site not responding. Last check: 2007-10-21)
Acetic acid is used as a chemical intermediate and solvent with widespread applications throughout industry.
Acetic anhydride, which is used in cigarette filters, acetate fibres, paracetamol/asprin and preservatives, is the fourth largest derivative at 12%.
Acetic acid is a clear, colourless, mobile liquid with a pungent odour and acidic taste.
www.icispricing.com /il_shared/cniChems/SubPage479.asp   (212 words)

  
 Acetic acid fermentation
This is owing to the conversion of the alcohol in acetic acid.
Acetic acid is produced by fermenting various substrates (starchy solution, sugar solutions or alcoholic foodstuffs such as wine or cider) with Acetobacter bacteria.
Legislation in many countries require that the acetic acid in vinegar must be produced by fermentation rather than by chemical processes.
www.tempeh.info /fermentation/acetic-acid-fermentation.html   (175 words)

  
 Acetic acid (vinegar) for weed control revisited
Teasdale suggested that the mechanism of action of acetic acid is similar to that of paraquat in that acetic acid causes the rapid dissolution of cell membrane integrity, resulting in the desiccation of foliar tissues, and ultimately plant death.
Acetic acid is nonselective and may damage any plant part contacted by the material.
Acetic acid concentrations from 10 to 20 percent controlled 80 to 100 percent of the smaller weeds, as reported in the USDA release.
www.ipm.iastate.edu /ipm/icm/2002/7-15-2002/vinegar.html   (480 words)

  
 Nat' Academies Press, Prudent Practices in the Laboratory: Handling and Disposal of Chemicals (1995)
The immediate toxic effects of acetic acid are due to its corrosive action and dehydration of tissues with which it comes in contact.
Acetic acid is slightly toxic by inhalation; exposure to 50 ppm is extremely irritating to the eyes, nose, and throat.
Acetic acid has not been found to be carcinogenic or to show reproductive or developmental toxicity in humans.
www.nap.edu /books/0309052297/html/240.html   (440 words)

  
 Acetic acid fumigation can prevent pear rots
Canadian researcher has found that fumigation with acetic acid is a promising treatment for killing the fungal spores that cause decay in pears during storage.
Acetic acid can be used as a drench, in which case it is similar to vinegar, which is a five percent acetic acid solution.
Acetic acid is cheap and is manufactured in large volumes.
www.goodfruit.com /link/Nov-97/special8.html   (780 words)

  
 Acetic acid bacteria: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-21)
The chemical compound acetic acid (from the latin word acetum, meaning "vinegar"), systematically called ethanoic acid, is the acid that gives...
The acetic acid bacteria are found in nature where ethanol is being formed as a result of yeast yeast quick summary:
The citric acid cycle (also known as the tricarboxylic acid cycle, the tca cycle, or the krebs cycle) is a series of chemical reactions of central...
www.absoluteastronomy.com /encyclopedia/a/ac/acetic_acid_bacteria.htm   (1049 words)

  
 EPA: Acetic Acid (044001) Fact Sheet
Acetic acid is a common chemical found in all living organisms.
Acetic acid is found in all living organisms.
To be effective, acetic acid needs to contact the plant leaves; the acidity of the spray solution damages and dries out the leaves.
www.epa.gov /pesticides/biopesticides/ingredients/factsheets/factsheet_044001.htm   (320 words)

  
 NPI: Acetic acid (ethanoic acid) fact sheet
Inhalation of acetic acid in general causes irritation of the nose, throat and lungs.
Acetic acid degrades rapidly to harmless substances in the environment.
Ethylic acid; vinegar acid; vinegar; methanecarboxylic acid; TCLP extraction fluid 2; shotgun; glacial acetic acid, glacial ethanoic acid.
www.npi.gov.au /database/substance-info/profiles/2.html   (1059 words)

  
 Acetic acid   (Site not responding. Last check: 2007-10-21)
Acetic acid is one of the world's most important chemicals and is a key raw material for the production of vinyl acetate monomer, acetic anhydride and the acetate esters.
Other acetic acid applications include food sauces and pickling, pharmaceuticals and it is also used as an acidulant in a wide range of applications from eletroplating to textiles manufacturing.
Acetic acid is available from BP in two grades to meet your application needs and handling requirements; chemically pure and 80% solution.
www.bp.com /sectiongenericarticle.do?categoryId=9002475&contentId=7004719   (321 words)

  
 acetic acid
Let's examine the structure and some bonds in acetic acid and the acid anion produced on dissociation, the acetate ion.
Acetic acid is a weak acid in water; however, it is a non-electrolyte in non-polar solvents such as benzene.
On dissociation of the hydrogen ion from acetic acid, the acetate ion forms a resonance structure, where the two carbon-oxygen bonds are of equal length.
academic.pgcc.edu /~ssinex/struc_bond/acetic_acid_molecule.htm   (447 words)

  
 Acetic acid
Renaissance-era alchemistss prepared glacial acetic acid through the dry distillation of metal acetates.
In 1968, however, a rhodium-based catalyst was discovered that could perform this reaction at atmospheric pressure, with almost no byproducts.
The first plant using this catalyst was built in 1970, and today it is the major method of acetic acid production.
www.knowledgefun.com /book/a/ac/acetic_acid.html   (1325 words)

  
 acetic acid on Encyclopedia.com   (Site not responding. Last check: 2007-10-21)
ACETIC ACID [acetic acid], CH H, colorless liquid that has a characteristic pungent odor, boils at 118°C, and is miscible with water in all proportions; it is a weak organic carboxylic acid (see carboxyl group).
Acetic acid is the major acid in vinegar ; as such, it is widely used as a food preservative and condiment.
Acetic acid industry once again becomes investment focus.
encyclopedia.infonautics.com /html/a1/aceticac.asp   (318 words)

  
 USGS OFR01-041: Procedures - Acetic Acid Treatment to Remove Carbonates
Generally, dilute acetic acid is preferred over hydrochloric acid because it less likely to affect clay crystallinity.
Add 1 part acid to 4 parts distilled water in the graduated cylinder and mix throughly with the glass rod.
A glass pipette may be used to transfer the acid solution.
pubs.usgs.gov /of/2001/of01-041/htmldocs/methods/acid.htm   (187 words)

  
 Vosol Otic Online, Description, Chemistry, Ingredients - Acetic Acid - RxList Monographs
Acetic Acid Otic Solution, USP is a nonaqueous solution of glacial acetic acid, USP (2°h), in a propylene glycol vehicle containing benzethonium chloride, USP (0.02%); propylene glycol diacetate, NF (3%) and sodium acetate, USP (0.01 5%).
The molecular formula for acetic acid is CH COOH, with a molecular weight of 60.05.
Acetic Acid Otic Solution is available as a nonaqueous otic solution buffered at pH 3 for use in the external ear canal.
www.rxlist.com /cgi/generic3/acetic.htm   (118 words)

  
 064. Acetic acid (FAO Nutrition Meetings Report Series 40abc)
Comments Acetic acid has a sufficiently acid taste to limit the amount used in foods.
In evaluating the acceptance of acetic acid, emphasis is placed on its established metabolic pathways and its normal consumption by man. Evaluation For purposes of evaluation all sources of acetate used as food additives should be considered together.
Since acetic acid has a sufficiently acid taste to limit the amount used in foods, it is not necessary to indicate acceptable daily intakes for man. REFERENCES Dreyfus, L. Compt.
www.inchem.org /documents/jecfa/jecmono/40abcj37.htm   (765 words)

  
 Aided Visual Inspection of the Cervix "Acetic Acid Test" by Nazeer
The objective of the aided visual inspection is solely to be able to recognize clinically normal (Acetic Acid Test Negative) from abnormal cervix (Acetic Acid Test Positive) and refer abnormal looking cases for further evaluation and diagnosis and appropriate treatment.
Do not apply acetic acid if there is a gross lesion suspicious of malignancy, refer patient directly to oncology/tertiary care facility.
Acetic Acid Test Negative (Normal cervix): follow-up after 3-5 years according to the decided policy.
www.gfmer.ch /Books/Cervical_cancer_modules/Aided_visual_inspection.htm   (468 words)

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