3, antimony (Ⅲ ) reacts with 2-(3,5-dibromo-2-pyridylazo)-5-diethylaminophenol (3, 5-Br,-PADAP) and cetyltrimethylammonium bromide (CTMAB) to form a complex, which displays a sharp adsorptive wave on a dropping mercury electrode with its peak potential at - 0.

1-Bromododecane was synthesized from potassium bromide which is the by-product of synthesizing 2-hydroxy-4-n-dodecyloxybenzophenone and n-dodecyl alcohol using concentrated sulfuric acid as catalyst.

The title compound was synthesized by treatment of 1-bromododecane with azacy-cloheptan-2-one in the presence of potassium hydroxide in toluene in yield of 88%～92%.

Laurocapram was synthesized using industrial grade 1-bromododecane as raw material after purification with sulphuric acid,and methylbenzene as solvent, and potassium hydroxide and potassium fluoride supported on alumina as catalyst.