A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
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Names | |||
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Preferred IUPAC name
Pyridine[1] | |||
Systematic IUPAC name
Azabenzene | |||
Other names
Azine
Azinine | |||
Identifiers | |||
3D model (JSmol)
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ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.003.464 | ||
EC Number |
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KEGG | |||
PubChem CID
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
C5H5N | |||
Molar mass | 79.102 g·mol−1 | ||
Appearance | Colorless liquid[2] | ||
Odor | Nauseating, fish-like[3] | ||
Density | 0.9819 g/mL (20 °C)[4] | ||
Melting point | −41.63 °C (−42.93 °F; 231.52 K)[4] | ||
Boiling point | 115.2 °C (239.4 °F; 388.3 K)[4] | ||
Miscible[4] | |||
log P | 0.65[5] | ||
Vapor pressure | 16 mmHg (20 °C)[3] | ||
Acidity (pKa) | 5.23 (pyridinium)[6] | ||
Conjugate acid | Pyridinium | ||
−48.7·10−6 cm3/mol[7] | |||
Thermal conductivity | 0.166 W/(m·K)[8] | ||
Refractive index (nD)
|
1.5095 (20 °C)[4] | ||
Viscosity | 0.879 cP (25 °C)[9] | ||
2.215 D[10] | |||
Thermochemistry[11] | |||
Heat capacity (C)
|
132.7 J/(mol·K) | ||
Std enthalpy of
formation (ΔfH⦵298) |
100.2 kJ/mol | ||
Std enthalpy of
combustion (ΔcH⦵298) |
−2.782 MJ/mol | ||
Hazards[15] | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards
|
Low to moderate hazard[13] | ||
GHS labelling: | |||
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Danger | |||
H225, H302, H312, H315, H319, H332[12] | |||
P210, P280, P301+P312, P303+P361+P353, P304+P340+P312, P305+P351+P338[12] | |||
NFPA 704 (fire diamond) | |||
Flash point | 20 °C (68 °F; 293 K)[16] | ||
482 °C (900 °F; 755 K)[16] | |||
Explosive limits | 1.8–12.4%[3] | ||
Threshold limit value (TLV)
|
5 ppm (TWA) | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose)
|
891 mg/kg (rat, oral) 1500 mg/kg (mouse, oral) 1580 mg/kg (rat, oral)[14] | ||
LC50 (median concentration)
Zdroj:https://en.wikipedia.org?pojem=PyridinesText je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.
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