3,3′-Diethyloxacarbocyanine iodide
3,3′-Diethyloxacarbocyanine iodide (CAS 905-96-4), with a molecular weight of 460.31, is a cyanine dye known for its fluorescent properties. Commonly used as a laser dye and a fluorescent probe, this compound finds applications in materials science and the development of organic and printed electronics. It is also recognised for its potential as a sensitive probe, particularly in flow cytometry.
- IUPAC
- 3-Ethyl-2-[3-(3-ethyl-2(3H)-benzoxazolylidene)-1-propenyl]benzoxazolium iodide,DOC Iodide,DiOC2(3)
- Synonyms
- C21H21IN2O23-Ethyl-2-[3-(3-ethyl-2(3H)-benzoxazolylidene)-1-propenyl]benzoxazolium iodideDOC IodideDiOC2(3)

Fluorescent Probes and Stains
This oxacarbocyanine derivative serves as a valuable fluorescent indicator and probe. Its spectral properties make it suitable for staining applications in biological and materials science research, enabling visualization and analysis.
Laser Dyes
As a cyanine dye, 3,3′-Diethyloxacarbocyanine iodide exhibits strong absorption and emission characteristics, making it a potential candidate for use as a laser dye in various optical applications.
Materials Science and Electronics
The compound's photophysical properties are of interest in materials science, particularly for organic and printed electronics and photonic materials. It may be utilised in the development of novel optoelectronic devices.
Flow Cytometry Probes
Recognised for its potential as a sensitive probe, this iodide salt can be applied in flow cytometry for cellular analysis and diagnostics. Its fluorescence properties allow for the detection and quantification of specific cellular events.
| Molecular weight | 460.31 |
|---|---|
| Empirical formula | C21H21IN2O2 |
| Assay | 98% |
| Melting point | 278 °C (dec.)(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 483 nm |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3,3′-Diethyloxacarbocyanine iodide used for?
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3,3′-Diethyloxacarbocyanine iodide is primarily used as a fluorescent indicator and probe, a laser dye, and in materials science for organic and printed electronics. It also shows potential as a sensitive probe for applications such as flow cytometry.
What is the CAS number and formula for 3,3′-Diethyloxacarbocyanine iodide?
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The CAS number for 3,3′-Diethyloxacarbocyanine iodide is 905-96-4. Its empirical formula (Hill notation) is C21H21IN2O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,3′-Diethyloxacarbocyanine iodide with an assay of 98%. This product is supplied for research and laboratory use; TSS does not represent it as USP, BP, EP or pharmacopoeia grade.
What are the safety and handling requirements for this chemical?
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This compound is a Warning substance, causing skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask (type N95), eyeshields, and gloves, should be worn. Handle in a well-ventilated area and avoid dust formation.
How is 3,3′-Diethyloxacarbocyanine iodide packed, shipped, and exported?
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Tech Serve Solutions expertly packs and ships 3,3′-Diethyloxacarbocyanine iodide globally, adhering to all necessary regulations for chemical exports. Specific packaging details are available upon request.
How can I request a quote or sample for 3,3′-Diethyloxacarbocyanine iodide?
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To request a quote or a sample of 3,3′-Diethyloxacarbocyanine iodide, please contact our sales team through the website or by phone. Our representatives will be pleased to assist you.
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