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Melamine

Melamine ( listen) is the organic compound with the formula C3H6N6. This white solid is a trimer of cyanamide, with a 1,3,5-triazine skeleton. It is widely used in production of certain plastics, e.g. Formica. Like cyanamide, it contains 67% nitrogen by mass, and its derivatives have fire retardant properties due to its release of nitrogen gas when burned or charred.

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Further Information

Names

Preferred IUPAC name: 1,3,5-Triazine-2,4,6-triamine

Other names

2,4,6-Triamino–triazine
Cyanurotriamide
Cyanurotriamine
Cyanuramide

Identifiers

CAS Number: 108-78-1

JSmol: Interactive image

ChEBI: CHEBI:27915

ChemSpider: 7667

ECHA InfoCard: 100.003.288

KEGG: C08737

PubChem: 7955

UNII: N3GP2YSD88

Properties

Chemical formula: C3H6N6

Molar mass: 126.12 g·mol

Appearance: White solid

Density: 1.574 g/cm

Melting point: 345 °C (653 °F; 618 K) (decomposition)

Boiling point: Sublimes

Solubility in water: 3240 mg/ L (20 °C)

Solubility: benzene

log : -1.37

K: 5.0 (Conjugated acid C3H7N3+)

K: 9.0

Magnetic susceptibility: -61.8·10 cm/mol−63

Refractive index: 1.872

Structure

Crystal structure: Monoclinic

Thermochemistry

Std enthalpy of
combustion: -1967 kJ/mol

Hazards

Autoignition
temperature: > 500 °C

median dose: 3850 mg/kg (rat, oral)

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).

Infobox references