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| Quinoline is also known as benzopyridine or naphthylpyridine. It is a compound formed by the combination of pyridine and benzene, and is a heterocyclic aromatic organic compound. At room temperature, it is a colorless hygroscopic liquid with a strong odor. When exposed to light, it gradually turns pale yellow and further turns brown. Its molecular formula is C9H7N. It is slightly soluble in water and easily soluble in many organic solvents such as ethanol and ether. There are two types of linkage, known as quinoline and isoquinoline. They are present in coal tar and bone tar. The crude quinoline obtained from coal tar contains approximately 4% of isoquinoline. The melting point of isoquinoline is 26.5℃, the boiling point is 242.2℃ (743 mmHg), and the density is 1.0986 g/cm³ (20℃). Its odor is completely different from that of quinoline. | |||||||||
91-22-5
futurechemical
91-22-5
Quinoline Basic information | |
Product Name: | Quinoline |
CAS: | 91-22-5 |
MF: | C9H7N |
MW: | 129.16 |
EINECS: | 202-051-6 |
Mol File: | 91-22-5.mol |
Quinoline Chemical Properties | |
Melting point | -17--13 °C (lit.) |
Boiling point | 113-114 °C/11 mmHg (lit.) 237 °C (lit.) |
density | 1.093 g/mL at 25 °C (lit.) |
vapor density | 4.5 (vs air) |
vapor pressure | 0.07 mm Hg ( 20 °C) |
refractive index | n20/D 1.625(lit.) |
Fp | 214 °F |
storage temp. | Store below +30°C. |
solubility | 6g/l |
pka | 4.9(at 20℃) |
form | Liquid |
color | Purple to dark grey |
Odor | Strong, unpleasant. |
PH | 7.3 (5g/l, H2O, 20℃) |
Odor Type | medicinal |
biological source | synthetic |
explosive limit | 1.2-7%(V) |
Water Solubility | slightly soluble |
Thermal Conductivity | 0.144 W/(m·K) at 25 ℃ |
Sensitive | Light Sensitive & Hygroscopic |
Merck | 148,068 |
BRN | 107477 |
Henry's Law Constant | 5.9×100 mol/(m3Pa) at 25℃, Duchowicz et al. (2020) |
Dielectric constant | 2.6（-180℃） |
Stability: | Stable. Incompatible with strong acids, strong oxidizing agents. May discolour on exposure to light. Hygroscopic - protect from moisture. Reacts violently and unpredictably with some materials, especially strong oxidizing agents. |
Major Application | cleaning products |
cosmetics | |
flavors and fragrances | |
food and beverages | |
personal care | |
InChI | 1S/C9H7N/c1-2-6-9-8(4-1)5-3-7-10-9/h1-7H |
InChIKey | SMWDFEZZVXVKRB-UHFFFAOYSA-N |
SMILES | c1ccc2ncccc2c1 |
LogP | 2.04 at 22℃ |
Surface tension | 43.12mN/m at 20°C |
CAS DataBase Reference | 91-22-5(CAS DataBase Reference) |
IARC | 2B (Vol. 121) 2019 |
NIST Chemistry Reference | Quinoline(91-22-5) |
EPA Substance Registry System | Quinoline (91-22-5) |
