Science, Tech, Math Science Chemical Structures Beginning With the Letter A Share Flipboard Email Print Science Chemistry Molecules Basics Chemical Laws Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry in Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Updated October 03, 2017 01 of 36 Chemical Structures - A Names (Abietane to Acyclovir) Acetone is an important molecule starting with the letter A. MOLEKUUL / Getty Images Browse a collection of chemical structures that have names beginning with the letter A. The following structures are two-dimensional, since it's easier to identify the types of atoms and bonds in this format. 02 of 36 Abietane Abietane Chemical Structure. The molecular formula for abietane is C20H36. 03 of 36 Abietic Acid This is the chemical structure of abietic acid. Ayacop/PD The molecular formula of abietic acid is C20H30O2. 04 of 36 Acenaphthene This is the chemical structure of acenaphthene. Bryan Derksen/PD The molecular formula for acenaphthene is C12H10. 05 of 36 Acenaphthoquninone This is the structure for acenaphthoquinone. puppy8800/PD The molecular formula for acenaphthoquinone is C12H6O2. 06 of 36 Acenaphthylene This is the chemical structure for acenaphthylene. Bryan Derksen/PD The molecular formula for acenaphthylene is C12H8. 07 of 36 Acepromazine This is the chemical structure for acepromazine. David-i98/PD The molecular formula for acepromazine is C19H22N2OS. 08 of 36 Acesulfame Potassium (Acesulfame K) This is the two-dimensional chemical structure of acesulfame potassium, which is also known as acesulfame K. Kletos, free documentation license The molecular formula for acesulfame potassium is C4H4KNO4S. 09 of 36 Acetaldehyde or Ethanal This is the two-dimensional molecular structure of acetaldehyde or ethanal, a flammable organic chemical compound. Acetaldehyde is also known as acetic aldehyde or ethyl aldehyde. Ben Mills The molecular formula of acetaldehyde or ethanal is C2H4O. Acetaldehyde is also denoted as MeCOH since the molecule is made up of a methyl group (CH3) and a formyl group (CHO). Molecular Mass: 44.052 Daltons 10 of 36 Acetamide This is the chemical structure of acetamide. Benjah-bmm27/PD The molecular formula for acetamide is C2H5NO. 11 of 36 Acetaminophen - Paracetamol This is the chemical structure of paracetamol or acetaminophen. Acetaminophen is commonly sold in the US under the brand name Tylenol. This pain reliever is derived from coal tar. Todd Helmenstine The molecular formula for acetaminophen is C8H9NO2. 12 of 36 Acetaminosalol This is the chemical structure of acetaminosalol. Edgar181/PD The molecular formula for acetaminosalol is C15H13NO4. 13 of 36 Acetamiprid This is the chemical structure of acetamiprid. Edgar181/PD The molecular formula for acetamiprid is C10H11ClN4. 14 of 36 Acetanilide This is the chemical structure of acetanilide. Rune.Welsh/PD The molecular formula for acetanilide is C6H5NH(COCH3). 15 of 36 Acetic Acid - Ethanoic Acid Acetic acid is also known as ethanoic acid. Cacycle, Wikipedia Commons This is the structure of acetic acid. Molecular Formula: C2H4O2 Molecular Mass: 60.05 Daltons Systematic Name: Acetic acid Other Names: Ethanoic acid, HOAc, hydroxymethyl ketone, methanecarboxylic acid 16 of 36 Acetic Anhydride This is the chemical structure of acetic anhydride. Todd Helmenstine Acetic anhydride, or ethanoic anhydride, has the formula (CH₃CO)₂O. 17 of 36 Acetate Ion Chemical Structure This is the chemical structure of the acetate anion. Todd Helmenstine The molecular formula for the acetate anion is C2H2O2-. 18 of 36 Acetoguanamine This is the chemical structure for acetoguanamine. Edgar181/PD The molecular formula for acetoguanamine is C4H7N5. 19 of 36 Acetone This is the chemical structure of acetone. Todd Helmenstine The molecular formula for acetone is CH3COCH3 or (CH3)2CO. Other Names: propanone, β-ketopropane, and dimethyl ketone 20 of 36 Acetonitrile This is the chemical structure of acetonitrile. Benjah-bmm27/PD The molecular formula for acetonitrile is C2H3N. 21 of 36 Acetophenone This is the chemical structure of acetophenone. Benjah-bmm27/PD The molecular formula for acetophenone is C8H8O. 22 of 36 Acetylcholine This is the chemical structure of acetylcholine. Todd Helmenstine This is the chemical structure of acetylcholine. Molecular Formula: C7H16NO2 Molecular Mass: 146.12 Daltons Systematic Name: 2-Acetoxy-N,N,N-trimethylethanaminium Other Names: (2-acetoxyethyl)trimethylammonium, choline acetate, ethanaminium, 2-(acetyloxy)-N,N,N-trimethyl 23 of 36 Acetylene or Ethyne Acetylene or ethyne molecule. Black spheres represent carbon and white spheres are hydrogen atoms. Science Photo Library Ltd / Getty Images The molecular formula for acetylene is C2H2. Acetylene or ethyne is the simplest of the hydrocarbon alkynes. 24 of 36 N-acetylglutamate This is the chemical structure of N-acetylglutamate and N-Acetylglutamic acid. Tomaxer/PD The molecular formula for N-acetylglutamate is C7H11NO5. 25 of 36 Acetylsalicylic Acid (Aspirin) This is the chemical structure of acetylsalicylic acid. Todd Helmenstine This is the chemical structure of acetylsalicylic acid, or more commonly known as the active ingredient in the drug aspirin. Molecular Formula: C9H8O4 Molecular Mass: 180.16 Daltons Systematic Name: 2-Acetoxybenzoic acid Other Names: 2-(Acetyloxy)benzoic acid, 2-Acetoxybenzenecarboxylic acid 26 of 36 Acid Fuchsin This is the chemical structure of acid fuchsin. Todd Helmenstine The molecular formula for acid fuchsin is C20H17N3Na2O9S3. 27 of 36 Aconitane Chemical Structure This is the chemical structure of aconitane. Todd Helmenstine The molecular formula for aconitane is C18H27N. 28 of 36 Acridine This is the chemical structure of acridine. Todd Helmenstine The molecular formula for acridine is C13H9N. 29 of 36 Acridine Orange This is the chemical structure of acridine orange. Klaus Hoffmeier The molecular formula for acridine orange is C17H19N3. 30 of 36 Acrolein or Propenal Molecular Structure This is the chemical structure of acrolein, also known as propenal. NEUROtiker/PD The molecular formula for acrolein or propenal is C3H4O. 31 of 36 Acrylamide This is the chemical structure of acrylamide. Benjah-bmm27 The molecular formula for acrylamide is C3H5NO. 32 of 36 Acrylic Acid This is the chemical structure of acrylic acid. Ben Mills/PD The molecular formula for acrylamide is C3H5NO. Acrylamide is an odorless, white, crystalline solid. 33 of 36 Acrylonitrile Chemical Structure This is the chemical structure of acrylonitrile. Todd Helmenstine The molecular formula for acrylonitrile is C3H3N. Acrylonitrile is a colorless, volatile organic liquid. 34 of 36 Acryloyl Chloride This is the chemical structure of acryloyl chloride. Edgar181/PD The molecular formula for acryloyl chloride is C3H3ClO. Acryloyl chloride is a translucent, pale yellow, flammable liquid that has an acrid odor. 35 of 36 Actin Protein G-Actin with the divalent cation and ADP highlighted. Actin is a globular protein that is found in nearly all eukaryotic cells. It is one of the main components of the cellular cytoskeleton. Thomas Splettstoesser Actin is one of the most abundant proteins found in eukaryotic cells. 36 of 36 Acyclovir This is the chemical structure of acyclovir. Fvasconcellos/PD The molecular formula for acyclovir is C8H11N5O3. Acyclovir is a drug used to treat certain types of viral infections, including herpes, shingles, and chicken pox. Continue Reading