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

HRID 66032Notes

Reaction equation

HRID 66032 reaction equation
[NH2:1][C:2]1[C:11]2[C:10]([S:12]([OH:15])(=[O:14])=[O:13])=[CH:9][CH:8]=[CH:7][C:6]=2[C:5]([S:16]([OH:19])(=[O:18])=[O:17])=[CH:4][CH:3]=1.[OH-].[Na+:21].C(O)C>O>[Na+:21].[Na+:21].[NH2:1][C:2]1[C:11]2[C:10]([S:12]([O-:15])(=[O:14])=[O:13])=[CH:9][CH:8]=[CH:7][C:6]=2[C:5]([S:16]([O-:19])(=[O:18])=[O:17])=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 702EthanolHCID 83361,5-Naphthalenedisulfonic acid, 4-amino-HCID 14798Sodium Hydroxide

Product 1

HCID 441502114-Aminonaphthalene-1,5-disulphonic acid, sodium salt

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

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.

Workup

  1. temperatureThe solution is warmed
  2. customis precipitated
  3. filtrationThe solid is collected by filtration
  4. washis washed with 85% aqueous ethyl alcohol, ethyl alcohol and ether
  5. customdried in vacuo

Sources & evidence

ORD record
ord-d92e0bf1aff44f88b4d9aefb3ad30afd
Source dataset
uspto-grants-1978_12
Patent number
US04129590

Reaction notes

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