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| Synonym | CAS | Purity | Package |
| 4-hydroxy-benzenesulfonicaci;4-Hydroxyphenylsulfonic acid;4-hydroxyphenylsulfonicacid;4-Phenolsulfonic acid;4-phenolsulfonicacid | 98-67-9 | 65.00% 75.00% | 250 kg/plastic drum |
Appearance:light brown transparent liquid
| Item | Indicator |
| Relative density | 1.337 g/mL at 25℃ |
| Refractive index | n20/D 1.489 |
| Acidity coefficient | 9.11 at (25℃） |
Purpose: is the main additives in acid tin plating process at the same time can also be used for acidic resin foam;Can be used as an intermediate.
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