Sodium Hydroxide → 8-Aminonaphthalene-1,3,6-trisulfonic acid

HRID 280878Notes

Reaction equation

HRID 280878 reaction equation
[Na+].[Na+].[NH2:3][C:4]1[CH:5]=[C:6]([S:22]([OH:25])(=[O:24])=[O:23])[CH:7]=[C:8]2[C:13]=1[C:12]([S:14]([O-:17])(=[O:16])=[O:15])=[CH:11][C:10]([S:18]([O-:21])(=[O:20])=[O:19])=[CH:9]2.[OH-].[Na+]>O>[NH2:3][C:4]1[CH:5]=[C:6]([S:22]([OH:25])(=[O:24])=[O:23])[CH:7]=[C:8]2[C:13]=1[C:12]([S:14]([OH:17])(=[O:16])=[O:15])=[CH:11][C:10]([S:18]([OH:21])(=[O:19])=[O:20])=[CH:9]2

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 13152118Disodium 8-amino-1,3,6-naphthalenetrisulfonate

Product 1

HCID 649518-Aminonaphthalene-1,3,6-trisulfonic acidYield 100.1%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A solution of 51.2 g of 8-amino-1,3,6-naphthalenetrisulfonic acid disodium salt in 120 ml of water containing 21.0 ml of 5N sodium hydroxide was warmed and filtered. The filtrate was slowly diluted with 400 ml of ethanol, stirred and allowed to cool to room temperature. The solid was collected, washed with ethanol, then ether and dried, giving 46.0 g of 8-amino-1,3,6-naphthalenetrisulfonic acid, trisodium salt.

Workup

  1. filtrationfiltered
  2. additionThe filtrate was slowly diluted with 400 ml of ethanol
  3. customThe solid was collected
  4. washwashed with ethanol
  5. dry with materialether and dried

Sources & evidence

ORD record
ord-be021f660ff542a28505cf8afcb79467
Source dataset
uspto-grants-1986_05
Patent number
US04591604

Reaction notes

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