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Crystal Violet Lactone (CVL) CAS 1552-42-7 is a high-performance, widely used leuco dye for pressure-sensitive and thermochromic materials. It is a key color-forming agent that produces an intense blue-violet color when exposed to acid, heat, or pressure. In its neutral state, it is colorless or pale, but upon stimulation, its lactone ring opens to form stable, vivid color compounds, making it ideal for applications like carbonless copy paper and thermal printing.
Crystal Violet Lactone (CVL) is a triarylmethane-based leuco dye, one of the most widely used color developers in the pressure-sensitive and thermal printing industries. It appears as an off-white to light yellow crystalline powder, and is nearly colorless in its natural state. When reacting with acidic developers (e.g., phenolic resins) or under thermal/mechanical stimulation, its lactone ring opens, forming a resonance-stabilized cation that produces a deep, intense blue-violet color. This reversible color-forming mechanism makes CVL a foundational component in many color-changing materials.
1. High color strength and vividness: Delivers an intense, clear blue-violet hue with minimal dosage, ensuring sharp, legible prints even at low concentrations.
2. Fast and stable color development: Reacts instantly to heat, pressure, or acidic developers to form a fade-resistant color that resists light, heat, and moisture over time.
3. Excellent solubility and compatibility: Easily dissolves in common organic solvents and works seamlessly with various developers, binders, and microencapsulation systems.
4. Broad adaptability: Performs reliably across different temperature/pressure ranges, suitable for both high-speed thermal printing and multi-part carbonless copy applications.
5. Cost-effective and easy processing: Offers consistent, industrial-grade performance with low volatility, simplifying manufacturing and reducing overall formulation costs.
Crystal Violet Lactone (CVL) is a triarylmethane-based leuco dye that forms an intense blue-violet color when its lactone ring opens under acidic conditions, heat, or pressure. This reversible reaction produces stable, vivid color compounds that are widely used in thermal and pressure-sensitive applications.
*Appearance & Color: Light yellow to white powder or crystal
*CVL Content: ≥ 96%
*Total Leuco Dye Content: ≥ 97%
*Color Strength (after development): ≥ 97% of the standard color plate
*Insoluble Matter in Solvent Oil (dialkyl diphenylethane): ≤ 0.2%
*Melting Point: ≥ 178°C
*Volatile Matter: ≤ 0.1%
*Solubility: Soluble in organic solvents, insoluble in water
*Color Development: Deep blue-violet in acidic media
Crystal Violet Lactone (CVL) is a high-performance leuco dye that produces a vivid, deep blue-violet color when triggered by heat, pressure, or acidic developers. It is a key color-forming agent for thermal and pressure-sensitive systems, capable of delivering sharp, stable prints in various applications. It forms clear, long-lasting color compounds that resist fading and environmental factors, achieving the goal of reliable color development.
Main application areas of Crystal Violet Lactone: thermal paper for POS receipts, shipping labels, and lottery tickets; pressure-sensitive carbonless copy paper for multi-part invoices and forms; thermochromic color-changing inks and textiles; anti-counterfeiting security markers and fuel tags; pH test strips and chemical indicators; specialty printing inks and coatings for document security.
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