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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.
Ascorbic acid is an organic compound with formula C 6 H 8 O 6, originally called hexuronic acid.It is a white solid, but impure samples can appear yellowish. It dissolves freely in water to give mildly acidic solutions.
[99] [100] 2011 World Wide Tours bus crash: road 15 [101] 1902 Madison Square fireworks explosion explosion 15 [102] 1883 Church of the Most Holy Redeemer school fire fire 14–16 [103] [104] 1945 1945 Empire State Building B-25 crash: aircraft 14 [105] 2021 Hurricane Ida: weather 13 [106] 1968 Williamsburg apartment fire fire 13 [107] 1905 ...
Natural tantalum consists of two stable isotopes: 180m Ta (0.012%) and 181 Ta (99.988%). 180m Ta ( m denotes a metastable state) is predicted to decay in three ways: isomeric transition to the ground state of 180 Ta, beta decay to 180 W , or electron capture to 180 Hf .