1,3,5-Triazine-2,4,6-triamine[3]
Overview
1,3,5-Triazine-2,4,6-triamine, commercially known as melamine, is a heterocyclic organic compound with a symmetrical triazine ring structure. It was first synthesized in the 1830s and gained industrial prominence in the mid-20th century for its utility in polymer production. Its high nitrogen content (66%) makes it valuable for flame-retardant applications, while its reactivity with formaldehyde enables the creation of durable resins. Melamine is produced globally, with major manufacturers in China, Europe, and North America. It is classified as an industrial chemical, though its misuse in food adulteration has led to strict regulatory controls. Industrial-grade melamine must meet purity standards (≥99.5%) for use in high-performance materials.
Physical and Chemical Properties
Melamine appears as a white crystalline powder with a density of 1.573 g/cm³. It sublimes rather than boiling, decomposing at 354°C. Its solubility in water is limited (3.1 g/L at 25°C), and it is nearly insoluble in organic solvents like ethanol or acetone. The compound’s stability under heat and resistance to oxidation make it suitable for high-temperature applications. Key chemical properties include its ability to react with formaldehyde to form melamine-formaldehyde resins, which are thermosetting polymers. These resins exhibit excellent hardness, scratch resistance, and thermal stability, making them ideal for laminates and coatings. Melamine’s nitrogen-rich structure also contributes to flame retardancy by releasing nitrogen gas when heated.
Main Applications
The primary use of melamine is in the production of melamine-formaldehyde resins, which account for over 60% of global demand. These resins are used to manufacture laminates for furniture, countertops, and flooring due to their durability and aesthetic versatility. They are also employed in adhesives for plywood and particleboard. Other applications include flame retardants in plastics, textiles, and insulation materials, where melamine’s nitrogen content inhibits combustion. In agriculture, melamine is a slow-release nitrogen source in fertilizers, though this use is declining due to environmental concerns. Lesser-known uses include concrete plasticizers and dye intermediates.
Safety and Storage
Melamine poses health risks if ingested or inhaled, with potential kidney damage from prolonged exposure. Dust control measures (e.g., ventilation, PPE) are essential in industrial settings. The compound is not classified as flammable but may emit toxic fumes (e.g., ammonia, nitrogen oxides) when heated above 350°C. Storage requires a cool, dry environment in tightly sealed containers to prevent moisture absorption, which can cause caking. Incompatible materials include strong acids and oxidizers. Spills should be contained and cleaned with protective gear, avoiding dust generation. Regulatory compliance (e.g., OSHA, REACH) is mandatory for workplace safety.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 or similar certifications to ensure consistent quality. Key specifications include purity (≥99.5%), moisture content (<0.1%), and ash content (<0.03%). Packaging options range from 25 kg woven bags to bulk shipments for large-scale users. Pricing fluctuates with raw material (urea) costs and regional supply-demand dynamics. Long-term contracts may offer stability. Buyers in the EU and North America should verify REACH or TSCA compliance. Sampling and third-party lab testing are recommended for new suppliers. Logistics considerations include moisture-proof transportation and storage facilities.
Related Manufacturers
- 主营：升降台、加热器、升降机、19、压力计、集尘机、万向滚珠、排气过滤器、耐高温加热棒
- 主营：传感器、光源、接头
- 主营：苯肼、氯甲基苯乙烯、无水氯化锂、4-二氢吡喃、4-溴靛红、丙酰乙酸甲酯、邻硝基苯磺酰氯、碘甲烷、亚磷酸三苯酯、苯并噻唑、苄胺、苯基锂、叔丁醇钾、三丁基膦、四羟基二硼