ADS645WS is 2-[5-(1,3-Dihydro-3,3-dimethy-1-(4-sulfobutyl)l-2H-indol-2-ylidene)-1,3-pentadienyl]-3,3-dimethyl-1-(4-sulfobutyl)-3H-indolium innersalt, monosodium.

The chemical formula for ADS645WS is C33 H41 N2 O6 S2 Na.

  • Appearance: Light Blue Powder
  • Molecular weight: 648.82 g mol-1
  • Melting Point: > 150oC (Decomp.)
  • Absorption maximum: 640 – 645 nm (in MeOH)
  • Absorption coefficient:  1.8 x 105 L mol-1 cm-1
  • Recommended Solvents: Water, Methanol