urea physicochemical properties
density 1.6±0.1 g/cm3
boiling point 165.1±23.0 °c at 760 mmhg
melting point 132-135 °c (lit.)
molecular formula ch4n2o
molecular weight 60.055
flash point 53.7±22.6 °c
exact quality 60.032364
psa 69.11000
logp -1.43
appearance traits white crystalline powder
vapor pressure 0.6±0.7 mmhg at 25°c
refractive index 1.528
storage conditions
1. this product should be sealed and stored in a cool dry place.
stability
1. it has a certain hygroscopicity and decomposes when heated above the melting point.
water solubility 1080 g/l (20 oc)
molecular structure
1, molar refractive index: 13.78
2, molar volume (cm3 / mol): 49.5
3, isotonic capacity (90.2k): 135.0
4, surface tension (dyne / cm): 55.3
5. polarization rate (10-24cm3): 5.46
computing chemistry
1. hydrophobic parameter calculation reference value (xlogp): -1.4
2. number of hydrogen bond donors: 2
3. number of hydrogen bond acceptors: 1
4. number of rotatable chemical bonds: 0
5. number of tautomers: 2
6. topological molecular polarity surface area 69.1
7. number of heavy atoms: 4
8. surface charge: 0
9. complexity: 29
10. number of isotope atoms: 0
11. determine the number of atomic stereocenters: 0
12. uncertainty of the number of atomic stereocenters: 0
13. determine the number of chemical bond stereocenters: 0
14. uncertain chemical bond number of stereocenters: 0
15. number of covalent bond units: 1
more
1. properties: white, odorless, odorless crystals or powder
2. density (g/ml, 25/4 ° c): 1.323
3. relative steam density (g/ml, air = 1): not determined
4. melting point (oc): 132.9 °c. when heated above the melting point, it decomposes into biuret, chlorine and cyanuric acid.
5. boiling point (oc, atmospheric pressure): 383
6. boiling point (oc, 5.2kpa): not determined
7. refractive index: 1.4299
8. flash point (oc): not determined
9. specific optical rotation (o): not determined
10. self-ignition point or ignition temperature (oc): not determined
11. vapor pressure (kpa, 25oc): not determined
12. saturated vapor pressure (kpa, 60oc): not determined
13. heat of combustion (kj/mol): not determined
14. critical temperature (oc): not determined
15. critical pressure (kpa): not determined
16. logarithmic value of oil-water (octanol/water) partition coefficient: not determined
17. upper explosion limit (%, v/v): not determined
18. lower explosion limit (%, v/v): not determined
19. solubility: soluble in water, ethanol and benzene, 1 g of this product can be dissolved in 1 ml, 10 ml of 95% ethanol, 1 ml of 95% boiling ethanol, 20 ml of absolute ethanol, 6 ml of methanol and 2 ml of glycerin. slightly soluble in ether, insoluble in chloroform.