it act as as a cationic detergent for the isolation dna from the given sample
"C16H34O"
C3H9O3P
None of both mentioned. It a neutral alcohol. It's hydroxyl group is not ionic like the hydroxide in NaOH. Cetyl alcohol, C16H33OH, 1-Hexadecanol
Trimethylsilyl azide is often used as a safer replacement for hydrazoic acid in organic synthesis. An example is the synthesis of Oseltamivir (ie Tamiflu).