| Chemistry name: | 1-naphthylamine-8-sulfonic acid |
| Chemistry structure: |
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| Properties: | |
| White needles. Slightly soluble in water. | |
| Derivation: | |
| Nitration of naphthalene-α-sulfonic acid followed by reduction with iron and crystallization of the sodium salt. | |
| Use: | |
| Azo dye intermediate, production of Chicago acid. | |