Réaction #94310

Équation de réaction

4-amino-1,5-naphthalenedisulfonic acid

sodium hydroxide

ethyl alcohol

→

4-amino-1,5-naphthalenedisulfonic acid disodium salt

Solvants

water

Conditions de réaction

Traitement

1. 1
   TempératureThe solution is warmed
2. 2
   Autreis precipitated
3. 3
   FiltrationThe solid is collected by filtration
4. 4
   Lavageis washed with 85% aqueous ethyl alcohol, ethyl alcohol and ether
5. 5
   Autredried in vacuo

Mode opératoire

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.

Source