IR-140
IR-140 (CAS: 53655-17-7), with the empirical formula C39H34Cl3N3O4S2 and a molecular weight of 779.19 g/mol, is a cyanine dye notable for its absorption spectrum peaking at 823 nm. This characteristic makes it suitable for applications requiring interaction with near-infrared light. It finds utility in laser dye applications and is of interest in materials science, organic electronics, and photonic materials development.
- IUPAC
- 5,5′-Dichloro-11-diphenylamino-3,3′-diethyl-10,12-ethylenethiatricarbocyanine perchlorate

Laser Dye
IR-140 is suitable for use as a laser dye, emitting in the infrared region of the spectrum. Its spectral properties allow for specific wavelength generation in laser systems.
Materials Science
This compound is employed in materials science research. Its optical properties are of interest for developing advanced materials with specific light absorption or emission characteristics.
Organic and Printed Electronics
IR-140 has applications in organic and printed electronics. Its photophysical properties can be leveraged in the development of novel electronic devices and components.
Photonic and Optical Materials
Researchers utilise IR-140 in the field of photonic and optical materials. Its absorption at 823 nm makes it valuable for applications involving light manipulation and detection in the near-infrared spectrum.
| Molecular weight | 779.19 |
|---|---|
| Empirical formula | C39H34Cl3N3O4S2 |
| Autoignition temp | 1075 °F |
| Application | Suitable as laser dye |
| Melting point | 250-252 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| 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 823 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-140 used for?
+
IR-140 is suitable as a laser dye and is of interest in materials science, organic and printed electronics, and photonic and optical materials. Its absorption peak is at 823 nm.
What is the CAS number and chemical formula for IR-140?
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The CAS number for IR-140 is 53655-17-7, and its empirical formula is C39H34Cl3N3O4S2.
What grade and purity does Tech Serve Solutions supply for IR-140?
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Tech Serve Solutions supplies IR-140 as a research-grade chemical. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling precautions for IR-140?
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IR-140 is classified with the GHS07 symbol and a Warning signal word. It carries hazard statements H302, H312, H315, H319, H332, and H335, indicating it is harmful if swallowed, in contact with skin, or inhaled, and causes skin and eye irritation. Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Always handle in a well-ventilated area.
How is IR-140 packed and shipped?
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Tech Serve Solutions packs and ships IR-140 according to international regulations for fine chemicals, ensuring product integrity and safety during transit. We are a global supplier and exporter.
How can I request a sample or quote for IR-140?
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To request a sample or a quote for IR-140, please contact our sales department through the website or by phone, providing your specific requirements and shipping details.
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