Description

Dir'Diic18(7) [1,1'-Dioctadecyl-3,3,3',3'-Tetramethylindotricarbocyanine Iodide] is a near-infrared (NIR) fluorescent dye belonging to the cyanine family, specifically engineered for superior lipid membrane labeling and long-term cellular tracking. Its core value lies in its exceptional photostability, high molar absorptivity, and deep tissue penetration capability, making it indispensable for advanced biomedical research and diagnostic development. This product is critically needed by researchers and developers in biophotonics, flow cytometry, and in vivo imaging, as well as by industrial teams formulating specialized fluorescent probes and sensors.

Application

• Lipid and Cell Membrane Labeling: Selective staining of plasma and organelle membranes in live and fixed cells for dynamic visualization.
• In Vivo Imaging: Used as a contrast agent for non-invasive deep-tissue imaging in small animal studies due to its NIR emission.
• Flow Cytometry & Fluorescence Microscopy: A stable, bright fluorophore for multicolor panel design and long-term cell tracking experiments.
• Liposome and Nanoparticle Tracking: Incorporation into lipid-based drug delivery systems to monitor biodistribution and cellular uptake.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer for targeted cancer treatments.
• Fluorescent Sensor Development: A key component in the synthesis of probes for detecting ions, biomolecules, or environmental changes.
• Material Science: Used in the development of organic photonic devices and light-harvesting assemblies.

Basic Information

Product Name	Dir'Diic18(7) [1,1'-Dioctadecyl-3,3,3',3'-Tetramethylindotricarbocyanine Iodide]
CAS No.	100068-60-8
Molecular Formula	C67H105IN2
Molecular Weight	1041.45 g/mol
Synonyms	DiI; DiIC18(7); 1,1'-Dioctadecyl-3,3,3',3'-tetramethylindotricarbocyanine iodide; DiI (DiIC18(7)); DIR DiI; DiI (1,1'-Dioctadecyl-3,3,3',3'-tetramethylindotricarbocyanine iodide); DIR DiIC18(7); Long Chain DiI Dye
EINECS	Contact for details

Quality Control

Every batch of our cyanine dyes is subjected to rigorous analytical testing to ensure identity, purity, and performance consistency for research applications. We employ advanced techniques including HPLC, NMR, and mass spectrometry to verify critical parameters. A comprehensive Certificate of Analysis (COA) detailing purity, absorbance/emission profiles, and functional performance data is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below under desiccant. This compound is both light-sensitive and hygroscopic. Allow the sealed vial to equilibrate to room temperature before opening to minimize moisture condensation. For long-term stability, store under an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black solid
Identification (HPLC)	Conforms to reference standard
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Absorption Maximum (λmax)	750 - 755 nm (in methanol)
Emission Maximum	775 - 785 nm (in methanol)
Extinction Coefficient (ε)	≥ 250,000 L·mol⁻¹·cm⁻¹
Solubility	Soluble in DMSO, DMF, ethanol, methanol
Loss on Drying	≤ 2.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.