Factory Supply High Quality Melamine 99% Solid CAS 108-78-1

Physical and chemical properties of melamine
Density 1.7± 0.1g /cm3
Boiling point 557.5±33.0 °C at 760 mmHg
Melting point 354 °C
Molecular formula C3H6N6
Molecular weight 126.120
Flash point 325.3±12.6 °C
Accurate mass 126.065392
PSA 116.73000
LogP-1.37
Appearance properties White solid
Vapor pressure 0.0±1.5 mmHg at 25°C
Refractive index 1.826
Storage condition
1. Store in a cool, ventilated warehouse. Keep away from fire and heat. It should be stored separately from oxidizers and acids, and should not be mixed. Storage areas should be equipped with suitable materials to contain leaks.

2. Wrap polypropylene woven bag or hessian bag or kraft paper bag or plastic coated glass wire bag with plastic bag, each bag 25kg or 40kg. Store in a cool, dry and ventilated place. Sunscreen, heat, moisture, strictly prevent high temperature storage and transportation.

Stability 1. React with strong oxidant and acid. White monoclinic crystal. Soluble in water, ethylene glycol, glycerin and pyridine. Slightly soluble in ethanol, insoluble in ether, benzene, carbon tetrachloride. Sublimation by heating, decomposition by sharp heating. It's not combustible. Low toxicity. 2. Low toxicity, no stimulation. Rats inhaled 200mg/m3 of dust for 2 consecutive hours, and no symptoms of poisoning were observed. Cyanide may be decomposed at high temperatures, so high temperatures should be avoided.

Water solubility 3 g/L (20 ºC)
Molecular structure
1, molar refractive index: 33.23

2, molar volume (cm3/mol) : 75.9

3. Isotropic specific volume (90.2K) : 267.2

4, surface tension (dyne/cm) : 153.2

5. Polarizability (10-24cm3) : 13.17

Computational chemistry
1. Reference value for calculating hydrophobic parameters (XlogP) : None

2. Number of hydrogen bond donors :3

3. Number of hydrogen bond receptors :6

4. Number of rotatable chemical bonds :0

5. Number of tautomers :5

6. Topological molecular polar surface area 117

7. Number of heavy atoms :9

8. Surface charge :0

9. Complexity :63.3

10. Number of isotope atoms :0

11. Determine the number of protonic centers :0

12. Number of uncertain atomic stereocentes :0

13. Determine the number of chemical bond structure centers :0

14. Number of uncertain chemical bond stereocenter :0

15. Number of covalent bond units :1

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1. Properties: white monoclinic crystal, can not burn.

2. Density (g/mL,20℃) : 1.573

3. Relative vapor density (g/mL, air =1) : 4.34

4. Melting point (ºC) : 354

5. Boiling point (ºC, atmospheric pressure) : not determined

6. Boiling point (ºC,2Kpa) : not determined

7. Refractive index (n20/D) : 1.872 (lit.)

8. Flash point (ºC) : > 110

9. Specific rotation (º) : not determined

10. Spontaneous ignition point or ignition temperature (ºC) : not determined

11. Vapor pressure (mmHg,26.5ºC) : not determined

12. Saturated vapor pressure (kPa,83-85ºC) : 6.66

13. Heat of combustion (KJ/mol) : not determined

14. Critical temperature (ºC) : not determined

15. Critical pressure (KPa) : not determined

16. Value of oil-water (octanol/water) distribution coefficient: not determined

17. Upper explosion limit (%,V/V) : not determined

18. Lower explosive limit (%,V/V) : not determined

19. Solubility: insoluble in water, slightly soluble in ethylene glycol, glycerin, ethanol, insoluble in ether, benzene, carbon tetrachloride