1,1′-Dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate

BioReagent, suitable for fluorescence, ≥98.0% (TLC)

Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level

product line



≥98.0% (TLC)


68 °C (dec.) (lit.)


DMF: soluble
DMSO: soluble
methanol: soluble


λex 550 nm; λem 567 nm in phosphate buffer/SDS pH 7.0


suitable for fluorescence

SMILES string




InChI key


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General description

DiI is a Dye Aye, a chemical with CAS number 41085-99-8. It is a fluorescent lipophilic cationic indocarbocyanine dye, which is usually made as a perchlorate salt. Mostly used for scientific staining purposes, such as single molecule imaging, fate mapping and neuronal tracing (as DiI is retained in the lipid bilayers).


1,1′-Dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate is used for the following applications:
  • Preparation of Dil solution
  • fluorescent membrane dye
  • Di-I Staining

Biochem/physiol Actions

Lipophilic carbocyanine dye used primarily for optical recordings of membrane voltage and for studies of membrane fluidity. Retrograde stain for neurons; provides intense, long-lasting staining of live neurons in vivo and in vitro.

Other Notes

Lipophilic fluorescent probe for studying membranes

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Calorimetric investigation of the phase partitioning of the fluorescent carbocyanine probes in phosphatidylcholine bilayers.
M F Ethier et al.
Biochemistry, 22(5), 1178-1182 (1983-03-01)
R D Klausner et al.
Biochemistry, 19(26), 6199-6203 (1980-12-23)
We have examined the phase partition preferences of the even chain length (n = 10-22) diacyl-3'3'-indocarbo-cyanine iodides (Cn diI) incorporated in disaturated lecithin (PC) vesicles. Two parameters were used to determine this phase preference: (i) the direction of shift of...
Guang-Di Chen et al.
Neural plasticity, 2014, 658741-658741 (2014-06-04)
Previous studies have shown that sodium salicylate (SS) activates not only central auditory structures, but also nonauditory regions associated with emotion and memory. To identify electrophysiological changes in the nonauditory regions, we recorded sound-evoked local field potentials and multiunit discharges...
Yong N Li et al.
The Journal of comparative neurology, 520(16), 3786-3802 (2012-08-22)
Bipolar cells convey luminance, spatial, and color information from photoreceptors to amacrine and ganglion cells. We studied the photoreceptor connectivity of 321 bipolar cells in the adult zebrafish retina. 1,1'-Dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI) was inserted into whole-mounted transgenic zebrafish retinas to...
Muhammad Umar Jawad et al.
PloS one, 5(12), e14250-e14250 (2010-12-21)
In carcinomas stromal cells participate in cancer progression by producing proteases such as MMPs. The expression MMP1 is a prognostic factor in human chondrosarcoma, however the role in tumor progression is unknown. Laser capture microdissection and In Situ hybridization were...
Nitric oxide (NO) as a signal transporter in neurons, endothelial cells and in the immune system.
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