IR 813 (tosylate)

🧪 1. Basic Information

• Chemical name: IR-813 p-Toluenesulfonate

• Common abbreviation: IR-813, NIR Dye 813

• Molecular nature: Organic cationic dye combined with p-toluenesulfonate (Tos⁻) as the counterion

• Appearance: Dark blue to blue-green powder

• Optical property: Strong absorption in the near-infrared region (~780–850 nm)

⚙️ 2. Main Function

The core function of IR-813 is:

To absorb near-infrared (NIR) light and convert it into heat or an electrical signal.

Because of this property, it is widely used as a near-infrared absorbing agent, laser sensitizer, or photothermal conversion material.

🧩 3. Main Applications

1️⃣ Optical and Electronic Materials

• Used as an additive in photoconductive, photosensitive, or laser writing materials.

• Applied in OLEDs, OPVs, laser protection films, optical filters, and infrared sensors.

• Effectively absorbs or blocks infrared light, improving spectral control of optical devices.

2️⃣ Laser Printing and Recording Materials

• Functions as a laser sensitizing dye in laser printers, photoresists, and optical disc (CD/DVD) recording layers.

• Absorbs laser energy (commonly at 830 nm) and converts it into localized heat for image or data recording.

3️⃣ Security and Anti-Counterfeiting Inks

• Used in security inks, NIR-readable inks, and invisible QR code labeling.

• Strongly absorbs in the NIR region (invisible to the human eye) but detectable by infrared scanners.

4️⃣ Photothermal Conversion Materials

• Utilized in photothermal therapy research and infrared-absorbing polymer composites.

• Converts NIR light into heat, enabling local heating or light-controlled release applications.

⚠️ 4. Safety and Storage

• Sensitive to light and heat; store in a cool, dry, and dark environment.

• The powder is hygroscopic; keep tightly sealed and dry.

• Avoid inhalation of fine particles during handling.

✅ 5. Summary

IR-813 p-Toluenesulfonate is a strong near-infrared absorbing dye


widely used in laser recording materials, security inks, optoelectronic devices, infrared shielding films, and photothermal conversion systems.


It is a key functional material in applications requiring absorption, shielding, or conversion of infrared light energy.