Ethanol → 4-Aminonaphthalene-1,5-disulphonic acid, sodium salt

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Reaction Steps

A 14.0 g amount of 4-amino-1,5-naphthalenedisulfonic acid is suspended in 100 ml of water and the solution is made basic with 5N sodium hydroxide. The solution is warmed and absolute ethyl alcohol is added until a solid is precipitated. The solid is collected by filtration and is washed with 85% aqueous ethyl alcohol, ethyl alcohol and ether, then dried in vacuo to yield 12.0 g of 4-amino-1,5-naphthalenedisulfonic acid disodium salt.

Provenance & Evidence