Rhod-2 (potassium salt)

CAS NO.：663625-18-1
Empirical Formula: C40H39K3N4O11
Molecular Weight: 869.05276
Update Date: 2026-04-21 10:31:43

What is Rhod-2 (potassium salt)?

Description

Rhod-2 (potassium salt) is a water-soluble, red fluorescent calcium indicator. It exhibits a significant shift in fluorescence intensity upon calcium binding (ex max = 549 nm; calcium-free v. ex/em max = 552/581 nm; calcium-bound).^1,2 Unlike the UV-excitable indicators fura-2 and indo-1 , there is no accompanying spectral shift.

References

1. Paredes, R.M., Etzler, J.C., Watts, L.T., et al. Chemical calcium indicators Methods 46(3),143-151(2008).
2. Minta, A., Kao, J.P., and Tsien, R.Y. Fluorescent indicators for cytosolic calcium based on rhodamine and fluorescein chromophores J. Biol. Chem. 264(14),8171-8178(1989).

Properties of Rhod-2 (potassium salt)

storage temp.	Store at -20°C
solubility	DMSO: soluble; Water: soluble
form	A solid

Safety information for Rhod-2 (potassium salt)

Computed Descriptors for Rhod-2 (potassium salt)

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