HYDROQUINONE - (123-31-9)

導入

名: hydroquinone; quinol; benzene-1,4-diol
* IUPAC
CAS番号: 123-31-9
化学式: C6H6O2 or C6H4(OH)2
モル質量: 110.11064 g
重量パーセント: C 65.447 %; H 5.4923 %; O 29.060 % 
異性体:  2-acetylfuran

分類

用途/機能

• "The bombardier beetle has a fascinating defense mechanism based on the oxidation of an organic compound with hydrogen peroxide. Within the beetle is a sac containing a mixture of the compound (hydroquinone) and hydrogen peroxide. An enzyme initiates the reaction, which is so exothermic that it causes the liquid to boil. The boiling liquid is then expelled at the beetle's enemies." 1

• "As photographic reducer and developer; as reagent in the determination of small quantities of phosphate; as antioxidant. Depigmentor." 2

物理的特性

融点:*
172.3°C 3 = 445.45 K = 342.14°F
沸点:*
287°C 3 = 560.15 K = 548.6°F
密度 (g/cm3):
1.328 at 15°C 3
1.332 at 15°C 2
* - 1 atm pressure

溶解度

定性:
水溶性の:  • 3
非常に可溶性:  • 3

ボンディング

ダブルボンズ: 3
三重結合: 0
σ結合: 14
パイ結合: 3
合計: 17
カルボキシル基: 0
水酸基: 2

熱化学

ΔHf° (s): -87.12 kcal/mol = -364.5 kJ/mol 4
ΔHf° (g): -63.41 kcal/mol = -265.3 kJ/mol 4
The heat of combustion is the amount of heat released when one mole of a substance undergoes combustion according to the general reaction equation:
CxHyOz + 0.25(4x+y-2z) O2 (g) → x CO2 (g) + 0.5y H2O (ℓ)

ΔHcomb° (s): -682.12740917782 kcal = -2854.05 kJ
ΔHcomb° (g): -705.836778202677 kcal = -2953.25 kJ

安全情報

NFPA 704 Ratings:
Health: 2 - Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury.
Flammability: 1 - Must be heated before ignition can occur. Flash point over 93°C (200°F).
Reactivity: 0 - Normally stable, even under fire exposure conditions, and is not reactive with water.

詳細については

ソース

(1) - Ebbing, Darrell D. General Chemistry 3rd ed.; Houghton Mifflin Company: Boston, MA, 1990; pp 536-537.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 4833.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 3-43.
(4) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-44.
(5) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-44.
(6) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-44.