Beschreibung
IR-775 775 nm Near-Infrared Sensitizing Dye
IR-775 Tosylate is a Near-infrared cyanine sensitizing dye used to extend the usable spectral response of compatible photoinitiating and thermal imaging systems into the near-infrared region.
Why Evaluate IR-775?
- Near-infrared cyanine sensitizer with a typical absorption maximum at 775 nm.
- Extends the usable spectral response of compatible photoinitiating systems into the near-infrared region.
- Designed for evaluation in lithographic printing and computer-to-plate laser applications.
- A reviewed TDS reports good pairing with HABI initiating systems; formulation compatibility must be confirmed.
Product Information and Typical Properties
| Name des Produkts | IR-775 Tosylate |
| Chemical class | Near-infrared cyanine sensitizing dye |
| CAS-Nr. | 205744-92-9 |
| Molekulare Formel | C39H43ClN2O3S |
| Source formula notation | C32H36ClN2·C7H7O3S |
| Molekulargewicht | 655.29 g/mol |
| Erscheinungsbild | Green crystalline powder; a reviewed TDS describes granular green metallic material |
| Absorption maximum | 775 nm |
| Schmelzpunkt | 191°C (capillary; typical TDS value) |
| Reinheit | Confirm with current lot-specific specification and COA |
Purity data boundary: Purity is not stated on the reviewed source product page or the reviewed 2025 TDS. Request the current lot-specific specification and COA.
IR-775 in Thermal CTP Imaging
In a thermal computer-to-plate coating, IR-775 absorbs near-infrared laser energy and converts it into heat. The resulting local thermal response acts on the compatible initiating, acid-generating or crosslinking chemistry to form an image according to the plate design and processing route.
The 775 nm absorption maximum should be matched to the output of the intended laser and verified in the complete coating rather than selected from nominal wavelength alone.
Anwendungen
- Thermal CTP plate formulations
- Lithographic printing materials
- Computer-to-plate near-infrared laser exposure systems
- Compatible HABI and other photoinitiating-package screening
Product Classification and Formulation Guidance
What IR-775 is – and is not: IR-775 is a spectral sensitizer, heat-sensitive dye and NIR absorber. It is not categorized as a standalone Type I or Type II photoinitiator. Performance depends on the complete initiating package, binder or resin, solvent, coating thickness and laser conditions.
Formulation guidance: No universal addition level is stated in the reviewed sources. Screen dye concentration, solubility, photoinitiator or co-initiator compatibility, coating thickness, exposure dose and post-exposure process in the intended CTP formulation.
Handling, Storage and Packaging
Storage and handling: Keep tightly closed in a cool, dark and well-ventilated place, away from oxidizing agents. Protect from sunlight, visible light and heat. Use suitable protective equipment and local exhaust where dust may form.
Verpackung: The reviewed source page lists a 1 kg aluminum-foil bag or black plastic drum. Confirm current commercial packaging when requesting a quotation.
Documentation: Request the current lot-specific specification, COA and SDS before formulation, handling or production use.
Kontaktieren Sie uns jetzt!
If you need pricing, a sample, current COA or SDS for IR-775 CTP formulation screening, please complete the contact form below. We usually respond within 24 hours. You can also email info@longchangchemical.com during business hours (8:30 am to 6:00 pm UTC+8, Monday to Saturday) or use the website live chat.
