Biuret Biuret
Structural formula
| Business number | 02WK |
|---|---|
| Molecular formula | C2H5N3O2 |
| Molecular weight | 103.08 |
| label |
carbamoylurea, Semicarbazone, Biuret, Imino dicarbonate diamide, biuret, Allophanic acid amide, Carbamoylurea, NH2CONHCONH2, Non-protein nitrogen additives |
Numbering system
CAS number:108-19-0
MDL number:MFCD00007946
EINECS number:203-559-0
RTECS number:None
BRN number:1703510
PubChem number:24849251
Physical property data
1. Characteristics: long white crystals.
2. Density (g/mL, 25℃): 1.01
3. Relative vapor density (g/mL, air=1): Undetermined
4. Melting point (ºC): 185-190
5. Boiling point (ºC, normal pressure): Undetermined
6. Boiling point (ºC, kPa): Undetermined
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7. Refractive index (D20): Not determined
8. Flash point (ºC): Not determined
9. Specific rotation (ºC): Undetermined
10. Autoignition point or ignition temperature (ºC): Undetermined
11. Vapor pressure (mmHg, ºC): Undetermined
12. Saturated vapor pressure (kPa, 20ºC): Undetermined
13. Heat of combustion (KJ/mol): Undetermined
14. Critical temperature (ºC): Undetermined
15. Critical pressure (KPa): Undetermined
16. Log value of oil-water (octanol/water) partition coefficient: Undetermined
17. Explosion upper limit (%, V/V): Undetermined
18. Explosion lower limit (%, V/V): Undetermined
19. Solubility: Easily soluble in alcohol, very slightly soluble in ether.
Toxicological data
None
Ecological data
This substance is slightly hazardous to water.
Molecular structure data
1. Molar refractive index: 22.03
2. Molar volume (cm3/mol): 71.9
3. Isotonic specific volume (90.2K ): 207.8
4. Surface tension (dyne/cm): 69.6
5. Polarizability (10-24cm3): 8.73
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): -0.7
2. Number of hydrogen bond donors: 3
3. Number of hydrogen bond acceptors: 2
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4. Number of rotatable chemical bonds: 0
5. Number of tautomers: 5
6. Topological molecule polar surface area 98.2
7. Number of heavy atoms: 7
8. Surface charge: 0
9. Complexity: 87.1
10. Number of isotope atoms: 0
11. Determined number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of stereocenters of chemical bonds: 0
14. Uncertain number of stereocenters of chemical bonds: 0
15. Number of covalent bond units: 1
Properties and stability
Avoid contact with strong oxidants and alkalis.
Storage method
Stored in a cool, ventilated warehouse. Keep away from fire and heat sources. They should be stored separately from oxidants and alkali metals, and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is prohibited to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with emergency release equipment and suitable containment materials.
Synthesis method
1. Mix urea, water and disodium hydrogen phosphate and heat to dissolve. Raise the temperature to 150-160°C and keep warm for 2 hours. After the reaction is completed, the reactants are poured into water and left overnight. The crystals are filtered out to obtain a crude product, which is recrystallized with dilute ammonia water to obtain the finished product biuret. In the production of urea, intermediate urine is used as raw material, and the finished product is obtained through high-temperature heat shrinkage, separation, and drying.
2.Urea co-production method is used industrially, using intermediate urine as raw material, and then heat shrinking, separating and drying at high temperature to obtain the finished product. In the laboratory, urea and disodium hydrogen phosphate can be dissolved in water, reacted at 150-160°C for 2 hours, and then poured into cold water overnight to separate the crystals, which is biuret.
Purpose
1. Used as pharmaceutical intermediates, growth hormones, foaming agents, and paint making
2.As a non-protein nitrogen source added to feed , this protein is synthesized by microorganisms in the rumen of animals to meet the animal’s protein needs and is safer than urea. It is an excellent animal feed additive.
