Armstrong's acid

Armstrong's acid
Skeletal formula of Armstrong's acid
Ball-and-stick model of the Armstrong's acid molecule
Names
Preferred IUPAC name
Naphthalene-1,5-disulfonic acid
Other names
Armstrong's acid
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.001.199 Edit this at Wikidata
UNII
  • InChI=1S/C10H8O6S2/c11-17(12,13)9-5-1-3-7-8(9)4-2-6-10(7)18(14,15)16/h1-6H,(H,11,12,13)(H,14,15,16) checkY
    Key: XTEGVFVZDVNBPF-UHFFFAOYSA-N checkY
  • InChI=1/C10H8O6S2/c11-17(12,13)9-5-1-3-7-8(9)4-2-6-10(7)18(14,15)16/h1-6H,(H,11,12,13)(H,14,15,16)
    Key: XTEGVFVZDVNBPF-UHFFFAOYAR
  • O=S(C2=CC=CC1=C(S(=O)(O)=O)C=CC=C12)(O)=O
  • O=S(=O)(O)c1cccc2c1cccc2S(=O)(=O)O
Properties
C10H8S2O6
Molar mass 288.299 g/mol
Appearance colorless solid
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 corrosive
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Armstrong's acid (naphthalene-1,5-disulfonic acid) is a fluorescent organic compound with the formula C10H6(SO3H)2. It is one of several isomers of naphthalenedisulfonic acid. It a colorless solid, typically obtained as the tetrahydrate.[1] Like other sulfonic acids, it is a strong acid. It is named for British chemist Henry Edward Armstrong.[2]

  1. ^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).
  2. ^ Senning, Alexander (2007). Elsevier's dictionary of chemoetymology. Elsevier. p. 30. ISBN 978-0-444-52239-9.