PRODUCT Properties
| Density | 1.815±0.06 g/cm3(Predicted) |
| pka | -1.55±0.50(Predicted) |
| CAS DataBase Reference | 88-39-1(CAS DataBase Reference) |
| EPA Substance Registry System | 1,3-Benzenedisulfonic acid, 4-formyl- (88-39-1) |
Description and Uses
Benzaldehyde-2,4-disulfonic acid is freely soluble in water. The sodium salt crystallizes with 2 mol of H 2 O and is freely soluble in water and poorly soluble in ethyl alcohol. It is made by reaction of 2,4-dichlorobenzaldehyde with sodium hydrogensulfite liquor or oxidation of 2,4- toluenedisulfonic acid with manganese dioxide in sulfuric acid. The acid is used in the production of triphenylmethane dyes and wetting agents.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H302-H319 |
| Precautionary statements | P305+P351+P338 |
