4-hydroxybenzenesulfonic acid
4-hydroxybenzenesulfonic acid introduction
Molecular formula: C6H6O4S
CAS 98-67-9
Molecular weight: 174.17
Other names: p-hydroxybenzenesulfonic acid, phenol-4-sulfonic acid solution, PHENOL SULFONIC ACID, phenol-4-sulfonic acid
4-hydroxybenzenesulfonic acid Specifications
| Indicator name | unit of measurement | standard requirement |
| Appearance | Red-brown transparent liquid | |
| Go门tent | % | > 65 |
| Odor | special | |
| Free sulfuric acid (H2So4) | % | < 3.0 |
| Free phenol (C6H6O) | % | < 0.8 |
| Iron (Fe) | ppm | <100 |
| Sulphur dioxide (SO2) | ppm | <60 |
| Density (20°C) | g/cm 3 | 1.32-1.37 |
4-hydroxybenzenesulfonic acid Application
4-hydroxybenzenesulfonic acid is widely used in printing and dyeing, synthetic plastics, petroleum exploration and pharmaceutical industries. It is a Resin curing, also an important additive in the acid tin plating process.