Melamine Cyanurate (MCA)

Melamine cyanurate (MCA) ,CAS:37640-57-6,is a salt formed by melamine and cyanuric acid in a 1:1 molar ratio. It is widely used as a halogen-free flame retardant in polymers such as nylon, polyesters, and polypropylene due to its ability to promote char formation and release inert gases upon decomposition. 

Basic Information:

- Chemical Formula: C₃H6N6  C₃H₃N₃O₃ 

- Molecular Weight: 255.19 g/mol 

- Appearance: White crystalline powder 

- Decomposition Temperature: ~350°C 

- Solubility: Insoluble in water and most organic solvents. 

Applications:

- Flame Retardant: Used in plastics, rubber, and coatings. 

- Synergistic Effects: Often combined with other flame retardants (e.g., metal oxides) for enhanced performance. 

Safety & Toxicity: 

- Low toxicity but may release hazardous gases (e.g., ammonia, nitrogen oxides) upon thermal decomposition. 

- Linked to kidney damage in cases of ingestion (historically associated with food adulteration scandals). 

Regulatory Status: 

- Approved for flame retardant use under REACH (EU) and other regulations when properly handled. 

- Banned in food-related applications due to past misuse. 

Handling & Storage: 

- Store in a cool, dry place away from strong acids/bases. 

- Use PPE (gloves, mask) to avoid inhalation or skin contact. 

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