Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Properties
Appearance: White to pale yellow crystalline powder, odorless, with uniform texture and no visible impurities. It is in a stable solid state under normal temperature and pressure, has good crystallinity, is easy to grind into fine powder, and is convenient for mixing and processing with other materials. Its appearance is stable, and it will not agglomerate, discolor or deteriorate under proper storage conditions; it is a colorless dye (leuco) in its natural state, and can quickly present bright yellow when heated or pressured superscript:3.
Solubility: Insoluble in water; slightly soluble in methanol, ethanol; easily soluble in most organic solvents such as chloroform, acetone, ethyl acetate and toluene. It has good compatibility with acidic color developers (such as bisphenol A, gallic acid) and hot-melt media, which lays a foundation for its application in heat/pressure-sensitive recording materials superscript:3.
Other properties: Purity is usually ≥98% for industrial use, meeting the requirements of heat/pressure-sensitive material production; it has good dispersibility, can be evenly mixed with other additives, and does not affect the overall performance of the product; it has no obvious corrosive effect on common metals and plastics, and has good stability in neutral and weak acid environments superscript:3.
Chemical Properties
1. Stability: Stable under normal temperature and pressure; stable to light, heat and oxygen; not easy to hydrolyze or oxidize, and can be stored for a long time under proper conditions without obvious deterioration. It has good thermal stability, can maintain its color development activity at conventional processing temperatures, and is not easy to decompose during the production of heat-sensitive materials superscript:3.
2. Reactivity: As a pyridine-based color former (leuco), it has good reversible color development performance, and can undergo proton transfer reaction with acidic color developers when heated or pressured, quickly presenting bright yellow. It has typical organic pyridine chemical properties, can undergo alkylation, acylation and other reactions, and its N,N-dimethylamino and octyloxy structures can optimize color development sensitivity and stability, suitable for long-term use of heat/pressure-sensitive products superscript:3.
3. Incompatibility: Incompatible with strong oxidizing agents and strong bases; avoid mixed storage with these substances to prevent decomposition or loss of color development activity; stable when mixed with common organic solvents, acidic color developers, hot-melt media and plastic raw materials, and has good compatibility, no obvious adverse reactions superscript:3.
Usage
1. Heat/Pressure-Sensitive Recording Materials: As the core color former, it is compounded with acidic color developers and hot-melt media, widely used in thermal paper, pressure-sensitive paper and thermal transfer ink. It is suitable for bills, labels, fax paper and other products. When heated or pressured, it can quickly present bright yellow, with high color development sensitivity and good color fastness superscript:3.
2. Reversible Thermochromic Materials: Used to prepare reversible thermochromic microcapsules, which can be applied to temperature indicators, intelligent packaging and anti-counterfeiting labels. It can realize repeated color development-fading, and its light and heat stability is better than that of traditional similar dyes, with long service life superscript:3.
3. Fiber and Coating Coloring: Used for coloring industrial fibers such as basalt fiber and glass fiber. After reacting with color developers such as hydrochloric acid, it has bright color, good water resistance and acid-base resistance, which meets the coloring needs of composite materials. It can also be used as a coloring component of ink and coating to prepare special anti-counterfeiting ink and improve product identification superscript:3.
4. Organic Synthesis and Functional Materials: Used as a chemical intermediate in organic synthesis, it is used to synthesize optoelectronic materials such as organic semiconductors and fluorescent probes. Its pyridine parent nucleus and dimethylamino group can regulate the molecular electronic structure, which is suitable for the optimization of optoelectronic properties. It can also be used as a heterocyclic building block to participate in coordination chemistry research and prepare metal complexes for catalytic and sensing fields superscript:3.
Storage
Store in a sealed container, keep away from light, moisture and air; store in a cool, dry and well-ventilated warehouse, the recommended storage temperature is 5-30°C to better maintain its stability and color development performance. It should be stored separately from strong oxidizing agents and strong bases, and should not be mixed for storage; avoid long-term exposure to open flames and high temperature to prevent decomposition and loss of color development activity. The storage period can reach 1-2 years under proper storage conditions; the common packaging includes 1kg, 5kg, 25kg/drum, suitable for industrial production and laboratory use superscript:3.
Safety Overview
Hazard Category: Non-irritant; No obvious hazard classification. It has no obvious irritation to skin and eyes; low acute toxicity, no specific LD50 data reported, but it is non-toxic under normal usage dosage. It is for professional industrial, chemical and laboratory use only; it is safe when used in accordance with operating specifications and dosage requirements, and there is no obvious safety risk in the production and use process superscript:3.
Safety Precautions
1. Personal Protection: Wear disposable gloves when handling (to avoid contamination of materials); no special protective equipment is required under normal operation; ensure adequate ventilation in the operation area, and wash hands thoroughly after handling. Avoid long-term direct contact to prevent potential adverse effects.
2. Emergency Handling: If contact with skin, wipe clean with a clean cloth, no special treatment is required; if contact with eyes, rinse with plenty of flowing water for 5-10 minutes, and seek medical advice if discomfort occurs; if inhaled, move to fresh air immediately, keep the respiratory tract unobstructed, and seek medical advice if discomfort occurs; if swallowed, drink plenty of water to dilute, call a poison center or doctor immediately.
3. Fire & Spill: Low flammability; use dry powder, foam or carbon dioxide fire extinguishing agents in case of fire; if spilled, isolate the contaminated area, wear protective equipment, collect the spilled powder with dry and clean tools, put it into a sealed container for proper disposal, and avoid entering drains or water courses to prevent environmental pollution.
4. Disposal: Dispose of waste and packaging in accordance with local environmental regulations; do not discard at will; waste can be properly treated as general industrial waste if it does not contain other harmful substances; transport in accordance with the regulations of general chemicals, avoid mixing with incompatible substances during transportation.
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