Ethanol → 4-Amino-1,6-naphthalenedisulfonic acid disodium salt

HRID 904035Notes

Reaction equation

HRID 904035 reaction equation
[CH:1]1[C:10]([S:11]([OH:14])(=[O:13])=[O:12])=[CH:9][C:8]2[C:3](=[C:4]([S:16]([OH:19])(=[O:18])=[O:17])[CH:5]=[CH:6][C:7]=2[NH2:15])[CH:2]=1.[OH-].[Na+:21].C(O)C>O>[Na+:21].[Na+:21].[NH2:15][C:7]1[C:8]2[C:3](=[CH:2][CH:1]=[C:10]([S:11]([O-:14])(=[O:13])=[O:12])[CH:9]=2)[C:4]([S:16]([O-:19])(=[O:18])=[O:17])=[CH:5][CH:6]=1

Participants

5

Reactant 3

HCID 702EthanolHCID 14798Sodium HydroxideHCID 665671-Naphthylamine-4,7-disulfonic acid

Product 1

HCID 1013102144-Amino-1,6-naphthalenedisulfonic acid disodium salt

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A 50.0 g amount of (61.5%) 1-naphthylamine-4,7-disulfonic acid is dissolved in 150 ml of water and 5 N sodium hydroxide is added until basic pH (10-11). The solution is warmed and ethyl alcohol is added until a precipitate forms. The solid is collected by filtration, washed with 85% ethyl alcohol, ethyl alcohol and ether and is dried in vacuo at 110° C. to give 31.0 g of 4-amino-1,6-naphthalenedisulfonic acid disodium salt.

Workup

  1. temperatureThe solution is warmed
  2. filtrationThe solid is collected by filtration
  3. washwashed with 85% ethyl alcohol, ethyl alcohol and ether
  4. customis dried in vacuo at 110° C.

Sources & evidence

ORD record
ord-07cb6543e7084d67aa182b2d57da3ee1
Source dataset
uspto-grants-1980_10
Patent number
US04229584

Reaction notes

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