3,3′-Diethylthiadicarbocyanine iodide

Dye content 98 %

DTDCI, 3-Ethyl-2-[5-(3-ethyl-2(3H)-benzothiazolylidene)-1,3-pentadienyl]benzothiazolium iodide, DiSC2(5)
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:


Dye content, 98%

Quality Level


249 °C (dec.) (lit.)


655 nm

SMILES string




InChI key


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DTDCi is used as;
  • Fluorescent contrast agent in three-dimensional fluorescence lifetime tomography.
  • Dye for rapid genetic screening.


1 g in glass bottle

Features and Benefits

High quantum yield of photoisomerisation and low triplet quantum yield at direct photoexcitation. Highly sensitive fluorescent dye.


Skull and crossbones

Signal Word


Hazard Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


UN 2811 6.1 / PGII

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Photophysical processes of polymethine dyes. An absorption, emission, and optoacoustic study on 3, 3'-diethylthiadicarbocyanine iodide.
Bilmes GM, et al.
The Journal of Physical Chemistry, 93(18), 6696-6699 (1989)
Ryan M Williams et al.
Hypertension (Dallas, Tex. : 1979), 71(1), 87-94 (2017-11-15)
Direct targeting to the kidneys is a promising strategy to improve drug therapeutic index for the treatment of kidney diseases. We sought to investigate the renal selectivity and safety of kidney-targeted mesoscale nanoparticle technology. We found that direct intravenous administration...
The effect of anionic, cationic and neutral surfactants on the photophysics and isomerization of 3, 3'-diethylthiacarbocyanine
Vinogradov, A. M., Tatikolov, A. S., & Costa, S. M.
Physical Chemistry Chemical Physics, 3(19), 4325-4332 (2001)
Jiang Pi et al.
Materials science & engineering. C, Materials for biological applications, 103, 109777-109777 (2019-07-28)
Tuberculosis (TB), caused by M.tuberculosis (Mtb), has become a top killer among infectious diseases. Enhancing the ability of anti-TB drugs to kill intracellular Mtb in host cells remains a big challenge. Here, an innovative nano-system was developed to increase drug...
Complex formation between 3; 3'-diethylthiacarbocyanine iodide and DNA and its investigation in aqueous solution
Anikovsky, M. Y., Tatikolov, A. S., & Kuzmin, V. A.
International Journal of Photoenergy, 1(1), 35-39 (1999)
Graphene has emerged as the new wonder material. Being only one atom thick and composed of carbon atoms arranged in a hexagonal honeycomb lattice structure, the interest in this material has exploded exponentially since 2004 when it was first isolated and identified using a very simple method.
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