Pure water-free acetic acid (glacial acetic acid) is a colorless hygroscopic liquid and freezes below 16.7 °C (62 °F) to a colourless crystalline solid. About Acetic acid. Acetic acid is an organic compound with the formula CH 3 COOH. Acetic acid also called ethanoic acid having the molecular formula CH 3 COOH prepared industrially by various methods and uses commonly as a solvent and in the preparation of organic chemicals like acetate, acetone, acetic anhydride, acetaldehyde alcohol, vinegar, etc. Acetic acid which is also known as Ethanoic acid is a colorless organic acid with chemicals formula C 2 H 4 O 2 is liquid with strong and distinctive pungent and sour smell. Acetic acid got its name from a word “Acetum”, which is a Latin word for vinegar. Physical properties. CASR number: 64-19-7. The systematic IUPAC name of acetic acid is ethanoic acid and its chemical formula can also be written as C 2 H 4 O 2. 2 O : 2 x 16 = 32. The other molecular formula mentioned in the quote, HC2H3O2 does try to emphasize that there is one acidic hydrogen and 3 non-acidic hydrogens on the molecule (CH3COOH does that better.) Synonyms: Ethanoic acid, Vinegar, Hydrogen acetate, Methanecarboxylic acid CAS: 64-19-7 Acetic acid is a colourless liquid organic compound. The most common method is oxidising primary alcohols. Molecular formula: C 2 H 4 O 2. C2H4O2 is very much like the molecular formula for a carbohydrate, i.e., C2(H2O)2. Acetic Acid Properties and Formula. Synonym: (4-Methoxybenzothioylthio)ethanoic acid, 2-[(4-Methoxyphenylthioxomethyl)thio]ethanoic acid, CTA, RAFT dithiobenzoate Empirical Formula (Hill Notation): C 10 H 10 O 3 S 2 Molecular Weight: 242.31 Making Ethanoic Acid. Synonyms: Ethanoic acid, vinegar, ethylic acid, vinegar acid, methanecarboxylic acid, TCLP extraction fluid 2, shotgun, glacial acetic acid, glacial ethanoic acid. These acids are a series of organic compounds that contain a carboxyl group (COOH), and there are a variety of methods that are used to produce them. It is a carboxylic acid consisting of a methyl group that is attached to a carboxyl functional group. Acetic acid has a distinctive sour taste and pungent smell. This is done in two simplified stages. 2 C : 12 x 2 = 24. Acetic acid: It is a mild organic acic with molecular formula CH3COOH and IUPAC name Ethanoic acid when pure it is as clear as pure water and freezes below the room temperaure. 24 + 4 + 32 = 60 g/mol C2H4O2 Acetic acid is an acid and the formula CH3COOH emphasizes that fact. Ethanoic acid is the most common example of a carboxylic acid. Substance name: Acetic acid. This acid is also known as Acetic acid ( C2H4O2 ) To find the formula mass (total mass) of the acid, take each of the elements out separately and add their mass together. 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