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1,3-Dibromopropane is a halogenated hydrocarbon. When at room temperature, it is a colorless to light-brown liquid with sweet odor. Synthetically, it is very useful to form C3-bridged compounds such as through C-N coupling reactions.

1,3-Dibromopropane was used in the first cyclopropane synthesis in 1881, known as the Freund reaction.

Synthesis

1,3-Dibromopropane can be prepared via the free radical addition between allyl bromide and hydrogen bromide.

Hypochlorous acid (HClO) is a weak acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO−. HClO and ClO− are oxidizers, and the primary disinfection agents of chlorine solutions. HClO cannot be isolated from these solutions due to rapid equilibration with its precursor. Sodium hypochlorite (NaClO) and calcium hypochlorite (Ca(ClO)2), are bleaches, deodorants, and disinfectants.

History

Indigo carmine, or 5,5′-indigodisulfonic acid sodium salt, is an organic salt derived from indigo by sulfonation, which renders the compound soluble in water. It is approved for use as a food colorant in the U.S and E.U.It has the E number E132. It is also a pH indicator.

Uses