37640-57-6

Basic information

• Product Name: Melamine cyanurate
• Synonyms: MELAMINE CYANURATE;1,3,5-triazine-2,4,6(1h,3h,5h)-trione,compd.with1,3,5-triazine-2,4,6-triam;1,3,5-triazine-2,4,6(1h,3h,5h)-trione,compd.with1,3,5-triazine-2,4,6-triamin;1,3,5-Triazine-2,4,6(1H,3H,5H)-trione,compd.with1,3,5-triazine-2,4,6-triamine(1:1);2,4,6-triamino-s-triazincompd.withs-triazine-triol;d022;melamine-cyanuricacidcompd.;melamineisocyanurate
• CAS NO: 37640-57-6
• Molecular Formula: C₃H₃N₃O₃*C₃H₆N₆
• Molecular Weight: 255.19
• EINECS: 253-575-7
• Product Categories: Flame retardant
• Mol File: 37640-57-6.mol
• Article Data: 4

Chemical Properties

• Melting Point: 350°C (dec.)
• Boiling Point: 557.5 °C at 760 mmHg
• Flash Point: 325.3 °C
• Appearance: white powder
• Density: 1.70
• Vapor Pressure: 1.2E-07mmHg at 25°C
• Refractive Index: 1.571
• Storage Temp.: Refrigerator
• Solubility: Acidic DMSO (Sparingly), Aqueous Acid (Slightly)
• Water Solubility: insoluble
• CAS DataBase Reference: Melamine cyanurate(CAS DataBase Reference)
• NIST Chemistry Reference: Melamine cyanurate(37640-57-6)
• EPA Substance Registry System: Melamine cyanurate(37640-57-6)

Safety Data

• Hazardous Substances Data: 37640-57-6(Hazardous Substances Data)

Usage

Uses

Different sources of media describe the Uses of 37640-57-6 differently. You can refer to the following data:
1. Environmental-friendly halogen-free inflaming lubricating agent
2. Melamine Cyanurate is a crystalline complex formed between Melamine (M208700) and Cyanuric Acid (C987715), and is unique in that it is a halogen-free flame retardant.

Definition

ChEBI: A crystalline complex formed from a 1:1 mixture of melamine and cyanuric (isocyanuric) acid, held together by an extensive two-dimensional network of hydrogen bonds between the two compounds.

Flammability and Explosibility

Notclassified

InChI:InChI=1S/C3H6N6.C3H3N3O3/c4-1-7-2(5)9-3(6)8-1;7-1-4-2(8)6-3(9)5-1/h(H6,4,5,6,7,8,9);(H3,4,5,6,7,8,9)

Synthetic route

2,4,6-triamino-s-triazine (108-78-1) → cyanuric acid melamine (37640-57-6)

Conditions	Yield
Stage #1: isocyanuric acid for 0.166667h; Stage #2: 2,4,6-triamino-s-triazine With K-SMA In water at 95 - 120℃; for 5h; Product distribution / selectivity; Heating / reflux;	99.5%
Stage #1: isocyanuric acid In water at 20℃; for 0.166667 - 30h; Stage #2: 2,4,6-triamino-s-triazine In water at 100℃; for 4h; Product distribution / selectivity;

2,4,6-triureido-1,3,5-triazine (4801-02-9) → uronium nitrate (124-47-0) + cyanuric acid melamine (37640-57-6) + isocyanuric acid (108-80-5)

Conditions	Yield
With hydrogenchloride for 4h; Heating;	A 26% B 18% C 77%

2-amino-4,6-diureido-1,3,5-triazine (90802-01-0) → ammelide (645-93-2) + uronium nitrate (124-47-0) + cyanuric acid melamine (37640-57-6) + isocyanuric acid (108-80-5)

Conditions	Yield
With hydrogenchloride Heating;	A 2% B 34% C 4% D 70%

2-amino-4,6-diureido-1,3,5-triazine (90802-01-0) → uronium nitrate (124-47-0) + cyanuric acid melamine (37640-57-6) + isocyanuric acid (108-80-5)

Conditions	Yield
With hydrogenchloride Heating;	A 34% B 34% C 70%

2,4,6-triamino-s-triazine (108-78-1) + isocyanuric acid (108-80-5) → cyanuric acid melamine (37640-57-6)

Conditions	Yield
With potassium hydroxide In water at 75℃; for 2h; Product distribution / selectivity;
With K-SMA In water at 95 - 100℃; for 6h; Product distribution / selectivity;
In water at 60℃; for 3h; Product distribution / selectivity; Industry scale;

Upstream product

• 108-78-1 2,4,6-triamino-s-triazine 
• 108-80-5 isocyanuric acid 
• 4801-02-9 2,4,6-triureido-1,3,5-triazine 
• 90802-01-0 2-amino-4,6-diureido-1,3,5-triazine 

Relevant articles and documents

Process for the Synthesis of Melamine Cyanurate in Lamellar Crystalline Shape with High Purity and Flowability

The present invention relates to a process for the synthesis of melamine cyanurate in lamellar crystalline shape with high purity and flowability. The procedures include that 1) melamine and cyanuric acid react to form mixture solution, 2) the mixture solution is filter-pressed to prepare filter cake, 3) filter cake and silicon oil are mixed to obtain semi-finished product, 4) dried the semi-finished product until the water content is less than 1.0%, 5) heat the temperature and control certain vacuum degree for curing and crystallizing, 6) the product is obtained. The processing steps of present invention are easy to operate, the processing parameters are easy to control, the production time of melamine cyanurate is short, the quantity of pure water is low, and utilization of equipments is high. Removing the incompletely reacted raw materials and impurities by filter-pressing, greatly increases the purity of semi-products.

Granular melamine cyanurate and preparation process thereof

Melamine cyanurate is prepared by heating melamine powder and cyanuric acid powder at 250° to 500° C. substantially in the absence of any liquid medium. The melamine cyanurate can be obtained in a granular form when the heating is conducted subsequent to granulation of a mixture of both the powders.