BTC, tetrapotassium salt *CAS 216453-54-2*
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Physical properties
Dissociation constant (Kd, nM) | 7000 |
Molecular weight | 844.02 |
Solvent | Water |
Storage, safety and handling
H-phrase | H303, H313, H333 |
Hazard symbol | XN |
Intended use | Research Use Only (RUO) |
R-phrase | R20, R21, R22 |
Storage | Freeze (< -15 °C); Minimize light exposure |
UNSPSC | 12352200 |
Overview | ![]() ![]() |
See also: Ratiometric Calcium Indicators
CAS 216453-54-2 | Molecular weight 844.02 | Dissociation constant (Kd, nM) 7000 |
This cell-impermeant coumarin Ca2+ indicator exhibits a shift in excitation maximum from about 480 nm to 400 nm upon binding Ca2+, enabling ratiometric calcium measurements. Due to its high selectivity and low affinity for Ca2+ (Kd ~7 uM) BTC is often used for the quantitation of high Ca2+levels.
Calculators
Common stock solution preparation
Table 1. Volume of Water needed to reconstitute specific mass of BTC, tetrapotassium salt *CAS 216453-54-2* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.
0.1 mg | 0.5 mg | 1 mg | 5 mg | 10 mg | |
1 mM | 118.481 µL | 592.403 µL | 1.185 mL | 5.924 mL | 11.848 mL |
5 mM | 23.696 µL | 118.481 µL | 236.961 µL | 1.185 mL | 2.37 mL |
10 mM | 11.848 µL | 59.24 µL | 118.481 µL | 592.403 µL | 1.185 mL |
Molarity calculator
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Citations
View all 1 citations: Citation Explorer
Thallium Flux Assay for Measuring the Activity of Monovalent Cation Channels and Transporters
Authors: Weaver, C David
Journal: (2018): 105--114
Authors: Weaver, C David
Journal: (2018): 105--114
References
View all 1 references: Citation Explorer
Ionic selectivity of low-affinity ratiometric calcium indicators: mag-Fura-2, Fura-2FF and BTC
Authors: Hyrc KL, Bownik JM, Goldberg MP.
Journal: Cell Calcium (2000): 75
Authors: Hyrc KL, Bownik JM, Goldberg MP.
Journal: Cell Calcium (2000): 75
Application notes
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A Meta-Analysis of Common Calcium Indicators
A New Red Fluorescent & Robust Screen Quest™ Rhod-4™ Ca2+Indicator for Screening GPCR & Ca2+ Channel Targets
A New Robust No-Wash FLIPR Calcium Assay Kit for Screening GPCR and Calcium Channel Targets
A Novel NO Wash Probeniceid-Free Calcium Assay for Functional Analysis of GPCR and Calcium Channel Targets
FAQ
Are there any calcium indicators that don't require probenecid (PBC)?
Are there any substitutes for probenecid in calcium assays?
Are there upgraded trypan blue derivatives for cell viability testing?
Can I intracellularly measure mitochondria calcium flux and changes in mitochondria membrane potential at the same time?
Do you offer any products for measuring intracellular calcium concentration or movement by flow cytometry?
Are there any substitutes for probenecid in calcium assays?
Are there upgraded trypan blue derivatives for cell viability testing?
Can I intracellularly measure mitochondria calcium flux and changes in mitochondria membrane potential at the same time?
Do you offer any products for measuring intracellular calcium concentration or movement by flow cytometry?