Ethanol → Disodium 4-aminonaphthalene-2,6-disulphonate

HRID 904036Notes

Reaction equation

HRID 904036 reaction equation
[CH:1]1[C:10]2[C:5](=[C:6]([NH2:15])[CH:7]=[C:8]([S:11]([OH:14])(=[O:13])=[O:12])[CH:9]=2)[CH:4]=[C:3]([S:16]([OH:19])(=[O:18])=[O:17])[CH:2]=1.[OH-].[Na+:21].C(O)C>O>[Na+:21].[Na+:21].[NH2:15][C:6]1[C:5]2[C:10](=[CH:1][CH:2]=[C:3]([S:16]([O-:19])(=[O:18])=[O:17])[CH:4]=2)[CH:9]=[C:8]([S:11]([O-:14])(=[O:13])=[O:12])[CH:7]=1

Participants

5

Reactant 3

HCID 702EthanolHCID 14798Sodium HydroxideHCID 807094-Aminonaphthalene-2,6-disulphonic acid

Product 1

HCID 11970552Disodium 4-aminonaphthalene-2,6-disulphonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A 45.0 g amount of (62.5%) 1-naphthylamine-3,7-disulfonic acid is suspended in 200 ml of water and 30 ml of 5 N sodium hydroxide is added to it. The solution is warmed and absolute ethyl alcohol is added until a cloudy precipitate forms. The solution is cooled and the solid is collected by filtration and is washed with 85% ethyl alcohol, ethyl alcohol and ether. The product is dried in vacuo at 110° C. to give 21.0 g of 4-amino-2,6-naphthalenedisulfonic acid disodium salt.

Workup

  1. temperatureThe solution is warmed
  2. temperatureThe solution is cooled
  3. filtrationthe solid is collected by filtration
  4. washis washed with 85% ethyl alcohol, ethyl alcohol and ether
  5. customThe product is dried in vacuo at 110° C.

Sources & evidence

ORD record
ord-76715e60f862433c961e23f7c1a80dba
Source dataset
uspto-grants-1980_10
Patent number
US04229584

Reaction notes

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