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{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 477238786
| ImageFile3 = Acetic acid.jpg
| ImageFile3_Ref = {{chemboximage|correct|??}}
| ImageSize3 = 244
| ImageName3 = Sample of acetic acid in a reagent bottle
| ImageFileL1 = Acetic-acid-2D-skeletal.svg
| ImageFileL1_Ref = {{chemboximage|correct|??}}
| ImageNameL1 = Skeletal formula of acetic acid
| ImageFileR1 = Acetic-acid-CRC-GED-3D-vdW-B.png
| ImageFileR1_Ref = {{chemboximage|correct|??}}
| ImageNameR1 = Spacefill model of acetic acid
| ImageFileL2 =Acetic-acid-2D-flat.png
| ImageFileL2_Ref = {{chemboximage|correct|??}}
| ImageNameL2 = Skeletal formula of acetic acid with all explicit hydrogens added
| ImageFileR2 = Acetic-acid-CRC-GED-3D-balls-B.png
| ImageFileR2_Ref = {{chemboximage|correct|??}}
| ImageNameR2 = Ball and stick model of acetic acid
| IUPACName = Acetic acid<ref>{{cite book | title=A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993) | publisher=Blackwell Scientific publications | author=IUPAC, Commission on Nomenclature of Organic Chemistry | year=1993 | chapter = Table 28(a) Carboxylic acids and related groups. Unsubstituted parent structures | url = http://www.acdlabs.eu/iupac/nomenclature/93/r93_705.htm |isbn=0-632-03488-2 }}</ref><ref>{{cite web|url = http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=176|title = Acetic Acid – PubChem Public Chemical Database|work = The PubChem Project|location = USA|publisher = National Center for Biotechnology Information}}</ref>
| SystematicName = Ethanoic acid<ref name="BB-prs310305">IUPAC Provisional Recommendations 2004 [http://old.iupac.org/reports/provisional/abstract04/BB-prs310305/Chapter1.pdf Chapter P-12.1; page 4]</ref>
| OtherNames = Vinegar (when dilute); Hydrogen acetate; Methanecarboxylic acid<ref>{{cite book|title=Scientific literature reviews on generally recognised as safe (GRAS) food ingredients|publisher=National Technical Information Service|year=1974|page=1}}</ref><ref>"Chemistry", volume 5, Encyclopedia Britannica, 1961, page 374</ref>
|Section1={{Chembox Identifiers
| Abbreviations = AcOH
| CASNo = 64-19-7
| CASNo_Ref = {{cascite|correct|CAS}}
| PubChem = 176
| ChemSpiderID = 171
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| UNII = Q40Q9N063P
| UNII_Ref = {{fdacite|correct|FDA}}
| EINECS = 200-580-7
| UNNumber = 2789
| DrugBank_Ref = {{drugbankcite|correct|drugbank}}
| DrugBank = DB03166
| KEGG = D00010
| KEGG_Ref = {{keggcite|changed|kegg}}
| MeSHName = Acetic+acid
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 15366
| ChEMBL = 539
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| IUPHAR_ligand = 1058
| Beilstein = 506007
| Gmelin = 1380
| 3DMet = B00009
| RTECS = AF1225000
| SMILES = CC(O)=O
| StdInChI = 1S/C2H4O2/c1-2(3)4/h1H3,(H,3,4)
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = QTBSBXVTEAMEQO-UHFFFAOYSA-N
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
}}
|Section2={{Chembox Properties
| C=2 | H=4 | O=2
| Appearance = Colourless liquid
| Odor = Pungent/Vinegar-like
| Density = 1.049 g cm<sup>−3</sup>
| Solubility = [[Miscible]]
| MeltingPtK = 289
| BoilingPtK = 391
| LogP = -0.322
| pKa = 4.76<ref>{{cite web|url=http://www2.lsdiv.harvard.edu/pdf/evans_pKa_table.pdf |date=4 November 2005 |title=pKa Table |last1=Ripin |first1=D. H. |last2=Evans |first2=D. A. |accessdate=19 July 2015 |deadurl=yes |archiveurl=https://web.archive.org/web/20150722005239/http://www2.lsdiv.harvard.edu/pdf/evans_pKa_table.pdf |archivedate=22 July 2015 }}</ref>
| pKb = 9.24 (basicity of acetate ion)
| Viscosity = 1.22 mPa s
| RefractIndex = 1.371
| Dipole = 1.74 D
}}
|Section5={{Chembox Thermochemistry
| DeltaHf = -483.88—483.16 kJ mol<sup>−1</sup>
| DeltaHc = -875.50—874.82 kJ mol<sup>−1</sup>
| Entropy = 158.0 J K<sup>−1</sup> mol<sup>−1</sup>
| HeatCapacity = 123.1 J K<sup>−1</sup> mol<sup>−1</sup>
}}
|Section6={{Chembox Pharmacology
| ATCCode_prefix = G01
| ATCCode_suffix = AD02
| ATC_Supplemental = {{ATC|S02|AA10}}
}}
|Section7={{Chembox Hazards
| GHSPictograms = {{GHS02}} {{GHS05}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|226|314}}
| PPhrases = {{P-phrases|280|305+351+338|310}}
| EUClass = {{Hazchem C}}
| RPhrases = {{R10}}, {{R35}}
| SPhrases = {{S1/2}}, {{S23}}, {{S26}}, {{S45}}
| NFPA-F = 2
| NFPA-H = 3
| NFPA-R = 0
| FlashPtC = 40
| AutoignitionPtC = 427
| LD50 = 3.31 g kg<sup>−1</sup>, oral (rat)
| LC50 = 5620 ppm (mouse, 1 hr)<br/>16000 ppm (rat, 4 hr)<ref>{{IDLH|64197|Acetic acid}}</ref>
| ExploLimits = 4–16%
| PEL = TWA 10 ppm (25 mg/m<sup>3</sup>)<ref name=PGCH>{{PGCH|0002}}</ref>
| REL = TWA 10 ppm (25 mg/m<sup>3</sup>) ST 15 ppm (37 mg/m<sup>3</sup>)<ref name=PGCH/>
| IDLH = 50 ppm<ref name=PGCH/>
}}
|Section8={{Chembox Related
| OtherFunction_label = [[carboxylic acid]]s
| OtherFunction = [[Formic acid]]<br />[[Propionic acid]]
| OtherCompounds = [[Acetaldehyde]]<br />
[[Acetamide]]<br />
[[Acetic anhydride]]<br />
[[Acetonitrile]]<br />
[[Acetyl chloride]]<br />
[[Ethanol]]<br />
[[Ethyl acetate]]<br />
[[Potassium acetate]]<br />
[[Sodium acetate]]<br />
[[Thioacetic acid]]
}}
}}
Ang '''asidong asetiko''' o '''asidong etanoiko''' (Ingles: ''acetic acid'', ''ethanoic acid'') ay isang mahalagang sangkap ng suka. Ang asidong asetiko na nasa suka ay isang malabnaw at tila hindi purong solusyon o timplada na may kahalong tubig. Ang asidong ito ay nabubuo mula sa alkohol sa pamamagitan ng gawain ng partikular na bakterya. Ang prosesong ito ay nakikilala bilang permentasyong asetiko.<ref name=TMHP>Robinson, Victor, Ph.C., M.D. (patnugot). (1939). "Acetic acid". The Modern Home Physician, A New Encyclopedia of Medical Knowledge. WM. H. Wise & Company (New York)., pahina 10.</ref>
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