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IPG-2 TMA⁺ Salt

A membrane impermeable fluorescent potassium indicator
Catalog #: B3143
SKU-Size Size Price Qty
B3143-5PK 5 x 50 μg
B3143-500 500 μg
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Product Details

Alternate Name Potassium (K⁺) indicator; IPG-2 membrane impermeable; IPG-2 tetramethylammonium TMA+ Salt; Fluorescent Potassium K+ indicator
Appearance Red-orange powder
Molecular Weight 1131
Purity ≥ 90%
Solubility Soluble in water
Handling Do not take internally. Wear gloves and mask when handling the product! Avoid contact by all modes of exposure.
Storage Conditions -20ºC
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


IPG-2 is a yellow-green fluorescent, intracellular potassium (K⁺) indicator with Ex/Em: 525 nm/545 nm and a high-sensitivity to detect small changes in K⁺ concentration. It is a small, synthetic fluorochrome which incorporates a K⁺-binding moiety. When K⁺ binds, the quenching is relieved and the fluorescence dramatically increases. IPG-2 has a higher affinity (Kd = 18 mM) than IPG-1 (Cat. Nos. B3140, B3141; Kd = 50 mM) and lower affinity than IPG-4 (Cat. Nos. B3144, B3145; Kd = 7 mM). IPG-2 TMA⁺ salt is a membrane impermeable form of IPG-1 that can be used in lipid membrane-free systems, liposomes, or can be introduced into cells by electroporation, microinjection or other methods.

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