{"id":11364,"date":"2026-08-27T08:44:03","date_gmt":"2026-08-27T08:44:03","guid":{"rendered":"https:\/\/longchangchemical.com\/product\/ir-775-near-infrared-sensitizing-dye-cas-205744-92-9\/"},"modified":"2026-08-27T08:44:03","modified_gmt":"2026-08-27T08:44:03","slug":"ir-775-near-infrared-sensitizing-dye-cas-205744-92-9","status":"publish","type":"product","link":"https:\/\/longchangchemical.com\/nl\/product\/ir-775-near-infrared-sensitizing-dye-cas-205744-92-9\/","title":{"rendered":"CHLUMINIT\u00ae IR-775 \/ 775 nm Near-Infrared Sensitizing Dye CAS 205744-92-9"},"content":{"rendered":"<h2><strong>IR-775 775 nm Near-Infrared Sensitizing Dye<\/strong><\/h2>\n<p>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.<\/p>\n<h2><strong>Why Evaluate IR-775?<\/strong><\/h2>\n<ul>\n<li>Near-infrared cyanine sensitizer with a typical absorption maximum at 775 nm.<\/li>\n<li>Extends the usable spectral response of compatible photoinitiating systems into the near-infrared region.<\/li>\n<li>Designed for evaluation in lithographic printing and computer-to-plate laser applications.<\/li>\n<li>A reviewed TDS reports good pairing with HABI initiating systems; formulation compatibility must be confirmed.<\/li>\n<\/ul>\n<h2><strong>Product Information and Typical Properties<\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td width=\"245\"><strong>Naam product<\/strong><\/td>\n<td width=\"390\">IR-775 Tosylate<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Chemical class<\/strong><\/td>\n<td width=\"390\">Near-infrared cyanine sensitizing dye<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>CAS-nr.<\/strong><\/td>\n<td width=\"390\">205744-92-9<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Molecuulformule<\/strong><\/td>\n<td width=\"390\">C39H43ClN2O3S<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Source formula notation<\/strong><\/td>\n<td width=\"390\">C32H36ClN2\u00b7C7H7O3S<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Molecuulgewicht<\/strong><\/td>\n<td width=\"390\">655.29 g\/mol<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Uiterlijk<\/strong><\/td>\n<td width=\"390\">Green crystalline powder; a reviewed TDS describes granular green metallic material<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Absorption maximum<\/strong><\/td>\n<td width=\"390\">775 nm<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Smeltpunt<\/strong><\/td>\n<td width=\"390\">191\u00b0C (capillary; typical TDS value)<\/td>\n<\/tr>\n<tr>\n<td width=\"245\"><strong>Zuiverheid<\/strong><\/td>\n<td width=\"390\">Confirm with current lot-specific specification and COA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Purity data boundary:<\/strong> Purity is not stated on the reviewed source product page or the reviewed 2025 TDS. Request the current lot-specific specification and COA.<\/p>\n<section id=\"lc-ir775-ctp\">\n<h2><strong>IR-775 in Thermal CTP Imaging<\/strong><\/h2>\n<p>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.<\/p>\n<p>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.<\/p>\n<\/section>\n<h2><strong>Toepassingen<\/strong><\/h2>\n<ul>\n<li>Thermal CTP plate formulations<\/li>\n<li>Lithographic printing materials<\/li>\n<li>Computer-to-plate near-infrared laser exposure systems<\/li>\n<li>Compatible HABI and other photoinitiating-package screening<\/li>\n<\/ul>\n<h2><strong>Product Classification and Formulation Guidance<\/strong><\/h2>\n<p><strong>What IR-775 is &#8211; and is not:<\/strong> 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.<\/p>\n<p><strong>Formulation guidance:<\/strong> 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.<\/p>\n<h2><strong>Handling, Storage and Packaging<\/strong><\/h2>\n<p><strong>Storage and handling:<\/strong> 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.<\/p>\n<p><strong>Verpakking:<\/strong> The reviewed source page lists a 1 kg aluminum-foil bag or black plastic drum. Confirm current commercial packaging when requesting a quotation.<\/p>\n<p><strong>Documentation:<\/strong> Request the current lot-specific specification, COA and SDS before formulation, handling or production use.<\/p>\n<div class=\"lc-related-products\">\n<h2><strong>Related Near-Infrared Sensitizing Dyes<\/strong><\/h2>\n<ul>\n<li><a href=\"https:\/\/longchangchemical.com\/nl\/product\/ir-813-near-infrared-sensitizing-dye-cas-134127-48-3\/\">CHLUMINIT\u00ae IR-813 for 830 nm Systems<\/a><\/li>\n<li><a href=\"https:\/\/longchangchemical.com\/nl\/product-category\/photoinitiator\/near-infrared-sensitizing-dye\/\">More Near-Infrared Sensitizing Dyes<\/a><\/li>\n<li><a href=\"https:\/\/longchangchemical.com\/nl\/product-category\/photoinitiator\/\">CHLUMINIT\u00ae Photoinitiator Series<\/a><\/li>\n<\/ul>\n<\/div>\n<h2><strong>Neem nu contact met ons op!<\/strong><\/h2>\n<p>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 <a href=\"mailto:info@longchangchemical.com\">info@longchangchemical.com<\/a> during business hours (8:30 am to 6:00 pm UTC+8, Monday to Saturday) or use the website live chat.<\/p>","protected":false},"excerpt":{"rendered":"<p>CHLUMINIT\u00ae IR-775 Tosylate is a 775 nm NIR cyanine sensitizing dye for thermal CTP plates, lithographic printing and compatible initiating systems.<\/p>","protected":false},"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[203,174],"product_tag":[],"class_list":{"0":"post-11364","1":"product","2":"type-product","3":"status-publish","5":"product_cat-near-infrared-sensitizing-dye","6":"product_cat-photoinitiator","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>IR-775 775 nm Infrared Sensitizing Dye CAS 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