Support & Resources


Fluo-3, Pentasodium Salt

Fluo-3, pentasodium is membrane-impermeant, but can be loaded into cells via microinjection or scrape loading.

Product Attributes

CAS number



Calcium indicators

Cell permeability

Membrane impermeant

Indicator type



506/526 nm

Catalog #
1 mg
Clear selection
Add to wishlist
(Please select quantity above )

Wishlist updated! View wishlist

Shipping, Handling & Tax (CA only) not included in price. Learn more

Tax is assessed in the state of California. All fees will be calculated during checkout based on your shipping information and are subject to change.

SPECIAL - Order 5 or more and receive 10% off.

Request a Bulk Quote

Product Description

Fluo-3, pentasodium is membrane-impermeant, but can be loaded into cells via microinjection or scrape loading.

  • Kd: 450 nM
  • λExEm (low or high [Ca2+]) = 506/526 nm
  • ε (506 nm) = 86,000 M-1cm-1
  • Orange red solid soluble in DMSO and water (pH >6)
  • Store at 4°C. Protect from light, especially when in solution
  • C36H25Cl2N5N2O13
  • MW: 879
  • [134907-84-9]




You may also like…

    DMSO, Anhydrous

    Anhydrous DMSO (dimethyl sulfoxide; methyl sulfoxide) is recommended for preparing stock solutions of AM ester dyes, reactive dyes and other related moisture-sensitive products.

    Calcium Calibration Buffer Kit

    This kit provides buffers for generating a range of accurate calcium concentrations for the calibration of fluorescent Ca2+ indicators.

    Probenecid, Sodium Salt, Water Soluble

    Probenecid is commonly used to inhibit organic-anion transporters located in the cell membrane. Such transporters can extrude dyes and indicators and thus contribute to low signal or high background in assays due to poor cellular retention of dyes.

    Fluo-4 AM Ester

    Membrane-permeant form of Fluo-4 calcium indicator.

    Fluo-3, AM Ester

    Membrane-permeant AM ester form of Fluo-3 that can be loaded into cells via incubation. Because of the relatively low water solubility of the AM ester, Pluronic F-127, a mild detergent, is often used as a dispersing agent to facilitate dye loading.

    Ionomycin, calcium salt

    Ionomycin is commonly used to modify intracellular calcium concentrations and to calibrate fluorescent calcium indicators. It is also known for its antiproliferative effects.