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DiI perchlorate [1,1-Dioctadecyl-3,3,3,3-tetramethylindocarbocyanine perchlorate] *CAS 41085-99-8*

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Physical properties
Molecular weight961.32
Spectral properties
Extinction coefficient (cm -1 M -1)148000
Excitation (nm)550
Emission (nm)564
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure


Molecular weight
Extinction coefficient (cm -1 M -1)
Excitation (nm)
Emission (nm)
DiI, DiO, DiD and DiR dyes are a family of lipophilic fluorescent stains for labeling membranes and other hydrophobic structures. The fluorescence of these environment-sensitive dyes is greatly enhanced when incorporated into membranes or bound to lipophilic biomolecules such as proteins although they are weakly fluorescent in water. They have high extinction coefficients, polarity-dependent fluorescence and short excited-state lifetimes. Once applied to cells, these dyes diffuse laterally within the cellular plasma membranes, resulting in even staining of the entire cell at their optimal concentrations. The distinct fluorescence colors of DiI (orange fluorescence), DiO (green fluorescence), DiD (red fluorescence) and DiR (deep red fluorescent) provide a convenient tool for multicolor imaging and flow cytometric analysis of live cells. DiO and DiI can be used with standard FITC and TRITC filters respectively. Among them DiI and its analogs are most frequently used since they usually exhibit very low cell toxicity. In addition, DiI is widely used for determining lipoproteins such as LDL and HDL.


Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of DiI perchlorate [1,1-Dioctadecyl-3,3,3,3-tetramethylindocarbocyanine perchlorate] *CAS 41085-99-8* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM104.024 µL520.118 µL1.04 mL5.201 mL10.402 mL
5 mM20.805 µL104.024 µL208.047 µL1.04 mL2.08 mL
10 mM10.402 µL52.012 µL104.024 µL520.118 µL1.04 mL

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Spectral properties

Extinction coefficient (cm -1 M -1)148000
Excitation (nm)550
Emission (nm)564



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