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Phenolsulfonic acid
CAS No:98-67-9
Alias: p-hydroxybenzenesulfonic acid, p-phenolsulfonic acid, phenol-4-sulfonic acid, phenol-4-sulfonic acid solution, curing agent, 4-hydroxybenzenesulfonic acid, p-phenolsulfonic acid hydrate
Molecular formula: C 6H6O4S
Molecular weight: 174.17
Structure: 
                   

Specifications: 65%, 75%, 95%
Product index:

project

index

65%

75%

95%

Appearance

brown red transparent liquid

content, % ≥

65

75

95

free acid (calculated as H2SO4), % ≤

1

1.5

2

density (20°C) ≤

1.30-1.35

1.35-1.40

1.53-1.60

iron ion ≤

100ppm

100ppm

100ppm

chloride ion ≤

100ppm

100ppm

100ppm

Water Dissolution Test

qualified

qualified

qualified

Packing: 200L plastic drum, 250Kg/barrel
Use: Phenolsulfonic acid (referred to as PSA) is The sulfonated product of phenol is the most important additive in the acid tin plating process and also has the effect of foaming the acidic resin. In the tinplate production line of the acidic process (such as the Fluorstein process), phenolsulfonic acid is mainly used as an additive in the tin plating solution to maintain the acidity of the tin plating solution, which is Sn2+ The production provides H+ and prevents the solution's Sn2+ dissolved oxidation into Sn4+ to keep the plating liquid It is stable and well conductive, and finally makes the tin plating layer of the tin plate produced fine, precise and uniform, with good surface finish and strong tin layer bonding force.

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