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Retene, methyl isopropyl phenanthrene or 1-methyl-7-isopropyl phenanthrene, C 18 H 18, is a polycyclic aromatic hydrocarbon present in the coal tar fraction, boiling above 360 °C.
Phase behavior Triple point: 178.5 K (−94.3 °C), ? Pa Critical point: 508 K (235 °C), 48 bar Std enthalpy change of fusion, Δ fus H o +5.7 kJ/mol Std entropy change
Little Boy was a type of atomic bomb created by the United States as part of the Manhattan Project during World War II.The name is also often used to describe the specific bomb (L-11) used in the bombing of the Japanese city of Hiroshima by the Boeing B-29 Superfortress Enola Gay on 6 August 1945, making it the first nuclear weapon used in warfare, and the second nuclear explosion in history ...
Spain, [f] officially the Kingdom of Spain, [a] [g] is a country in Southwestern Europe with territories in North Africa. [12] [h] Featuring the southernmost point of continental Europe, it is the largest country in Southern Europe and the fourth-most populous European Union member state.
Benzalkonium chloride (BZK, BKC, BAK, BAC), also known as alkyldimethylbenzylammonium chloride (ADBAC) and by the trade name Zephiran, [1] is a type of cationic surfactant.It is an organic salt classified as a quaternary ammonium compound.