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Indo-1, Pentasodium Salt

Membrane-impermeant calcium indicator that can be loaded into cells via microinjection or scrape loading.

Product Attributes

CAS number



Calcium indicators

Cell permeability

Membrane impermeant

Indicator type



349/482 nm (no Ca2+); 331/398 nm (high Ca2+)

Catalog #
1 mg
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Product Description

Membrane-impermeant calcium indicator that can be loaded into cells via microinjection or scrape loading. We also offer membrane-permeant Indo-1, AM Ester.

  • Kd: 250 nM
  • λExEm (no Ca2+) = 349/482 nm
  • λExEm (high Ca2+) = 331/398 nm
  • ε (349 nm, no Ca2+) = 33,000 M-1cm-1
  • Light yellow solid soluble in DMSO
  • Store at 4°C and protect from light, especially in solution
  • C32H26N3Na5O12
  • MW: 759.5
  • [132319-56-3]




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