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Certain substances and articles possessing certain hazard not covered by any other classes (class 1 to 8) are assigned to Class 9. Class 9 includes, inter alia (Among other things): .1 substances and articles not covered by other classes which experience has shown, or may show, to be of such a dangerous character that the … Continue reading CLASS 9: MISCELLANEOUS DANGEROUS SUBSTANCES AND ARTICLES AND ENVIRONMENTALLY HAZARDOUS SUBSTANCES