IR-820
IR-820 (CAS: 172616-80-7) is a sophisticated cyanine dye with the empirical formula C46H50ClN2NaO6S2 and a molecular weight of 849.47 g/mol. It is recognised for its strong absorption in the near-infrared region, specifically at λmax 820 nm. This characteristic makes it a valuable component in laser applications and as a near-IR dye for advanced material science research and development.
- IUPAC
- 2-[2-[2-Chloro-3-[[1,3-dihydro-1,1-dimethyl-3-(4-sulfobutyl)-2H-benzo[e]indol-2-ylidene]-ethylidene]-1-cyclohexen-1-yl]-ethenyl]-1,1-dimethyl-3-(4-sulfobutyl)-1H-benzo[e]indolium hydroxide inner salt, sodium salt,New Indocyanine Green

Laser Dye
IR-820 functions effectively as a laser dye due to its significant absorption and emission properties in the near-infrared spectrum. It is employed in the development and operation of various laser systems requiring specific wavelengths.
Near-Infrared (NIR) Dye
Its strong absorption at 820 nm makes IR-820 suitable as a near-infrared dye for applications in materials science, particularly in organic and printed electronics, and in photonic and optical materials.
Materials Science
The unique optical properties of IR-820 lend themselves to research and development in advanced materials, including those used in organic electronics and optical technologies where specific light absorption is critical.
| Molecular weight | 849.47 |
|---|---|
| Empirical formula | C46H50ClN2NaO6S2 |
| Application | laser and near-IR dye |
| Melting point | >300 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 820 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 IR-820 used for?
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IR-820 is primarily used as a laser dye and a near-infrared (NIR) dye in materials science, organic electronics, and photonic applications, owing to its absorption maximum at 820 nm.
What are the CAS number and formula for IR-820?
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The CAS number for IR-820 is 172616-80-7, and its empirical formula is C46H50ClN2NaO6S2.
What grade and purity does Tech Serve Solutions supply for IR-820?
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Tech Serve Solutions supplies IR-820 typically as a research or technical grade material. The specific purity and assay are detailed on the Certificate of Analysis provided with each batch, and TSS does not represent this product as USP, BP, or EP grade.
How should IR-820 be handled safely?
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Safe handling of IR-820 requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used. Observe all standard laboratory safety protocols for chemical handling. The WGK Germany rating is 3.
How is IR-820 packed, shipped, and exported?
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IR-820 is carefully packed to ensure stability and integrity during transit. Tech Serve Solutions, as a specialist global supplier, exports chemicals worldwide, adhering to all relevant shipping and customs regulations.
How can I request a sample or quote for IR-820?
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To request a sample or a quotation for IR-820, please contact the Tech Serve Solutions sales team directly through our website or by calling our office. Please provide your contact details and the quantity required.
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