Disodium 8-amino-1,3,6-naphthalenetrisulfonate → 8-Aminonaphthalene-1,3,6-trisulfonic acid

HRID 2166506Notes

Reaction equation

HRID 2166506 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>O.[OH-].[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]([OH:17])(=[O:16])=[O:15])=[CH:11][C:10]([S:18]([OH:21])(=[O:19])=[O:20])=[CH:9]2

Participants

4

Reactant 1

HCID 13152118Disodium 8-amino-1,3,6-naphthalenetrisulfonate

Product 1

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

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 14798Sodium HydroxideSolvent

Procedure

A solution of 51.2 g of 8-amino-1,3,6-naphthalenetrisulfonic acid disodium salt in a mixture of 120 ml of water and 21.0 ml of 5 N sodium hydroxide was warmed and then filtered. The filtrate was slowly diluted with 400 ml of ethanol. The mixture was cooled to room temperature and the solid was collected by filtration, washed with ethanol, then ether and dried at 110° C. overnight giving 46.0 g of 8-amino-1,3,6-naphthalenetrisulfonic acid, trisodium salt.

Workup

  1. temperaturewas warmed
  2. filtrationfiltered
  3. additionThe filtrate was slowly diluted with 400 ml of ethanol
  4. filtrationthe solid was collected by filtration
  5. washwashed with ethanol
  6. dry with materialether and dried at 110° C. overnight

Sources & evidence

ORD record
ord-48fd77e56f5d4632aede37a1ecd18628
Source dataset
uspto-grants-1983_06
Patent number
US04387059

Reaction notes

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