Structural formula
| Physical competition number | 014W |
|---|---|
| Molecular formula | C5H9N3 |
| Molecular weight | 111.15 |
| label |
1H-imidazole-4-ethylamine, 2-Imidazoleethylamine, histamine, Beta-aminoethylimidazole, Beta-aminoethylglyoxaline, histamine, ergotamine, 2-Imidazol-4-ylethylamine, Eramine, Histamine, Free Base, 1H-Imidazole-4-ethanamine (9CI), Histamine (8CI) |
Numbering system
CAS number:51-45-6
MDL number:MFCD00005210
EINECS number:200-100-6
RTECS number:MS1050000
BRN number:2012
PubChem number:24895783
Physical property data
1. Properties: White needle-like crystals. Sensitive to air. Hygroscopic.
2. Density (g/mL, 25/4?): Undetermined
3. Relative vapor density (g/mL, air=1): Undetermined
4. Melting point (ºC): Not determined
5. Boiling point (ºC, normal pressure): Not determined
6. Boiling point (ºC, 5.2kPa): Not determined Determined
7. Refractive index: Undetermined
8. Flash point (ºC): Undetermined
9. Specific rotation (º): Undetermined
10. Autoignition point or ignition temperature (ºC): Undetermined
11. Vapor pressure (kPa, 25ºC): Undetermined
12. Saturation Vapor pressure (kPa, 60ºC): 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. Lower explosion limit (%,V/V): Undetermined
19. Solubility: Easily soluble in water, ethanol and hot chloroform , slightly soluble in ether.
Toxicological data
None
Ecological data
None
Molecular structure data
1. Molar refractive index: 31.86
2. Molar volume (cm3/mol): 97.4
3. Isotonic specific volume (90.2K ): 266.6
4. Surface tension (dyne/cm)???56.0
5. Polarizability (10-24cm3): 12.63
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 2
3. Number of hydrogen bond acceptors: 2
4. Number of rotatable chemical bonds: 2
5. Number of tautomers: 2
6. Topological molecule polar surface area 54.7
7. Number of heavy atoms: 8
8. Surface charge: 0
9. Complexity: 64.7
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 1
Properties and stability
None
Storage method
Seal and store in a cool place away from light.
Synthesis method
Can be produced by decarboxylation of histidine.
Purpose
It can cause smooth muscle spasm, capillary dilation, and increased permeability. In allergic diseases, there may be a release of histamine or similar substances in the body. In medical treatment, it is mainly used to promote gastric acid secretion to check the secretory function of the stomach.
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