| 摘要 |
1. Phosphoric acid salt of N-methyl-o-phenylenediamine. 2. Phosphoric acid salt of N-methyl-o-phenylenediamine according to claim 1, characterized by general Formula I wherein n is a number between 0.5 and 1.0. 3. Phosphoric acid salt of N-methyl-o-phenylenediamine according to claim 2, characterized in that n is between 0.7 and 0.8. 4. Phosphoric acid salt of N-methyl-o-phenylenediamine according to one of claims 2 and 3, characterized in that n is between 0.75 and 0.78. 5. Process for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterized in that N-methyl-o-phenylenediamine according to one of the preceding claims is dissolved in a solvent and mixed with crystalline or dissolved phosphoric acid. 6. Process according to claim 5 for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterized in that N-methyl-o-phenylenediamine is prepared in situ. 7. Process according to claim 6 for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterized in that the o-N-methyl-o-phenylenediamine is prepared in situ from o-nitro-N-methylaniline. 8. Process according to one of claims 5 to 7 for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterized in that the solvent is a C1-C5-alcohol. 9. Process according to claim 8 for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterized in that the solvent for N-methyl-o-phenylenediamine and for the phosphoric acid is ethanol, propanol or isopropanol. 10. Process according to claim 9 for preparing a phosphoric acid salt of N-methyl-o-phenylenediamine according to one of the preceding claims 1 to 4, characterised in that the solvent for N-methyl-o-phenylenediamine and for the phosphoric acid is ethanol.
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