Not chemicals, but belongs to
Class XVIII Optical, photographic, cinematographic, metrological, measuring, testing, medical or surgical instruments and apparatus, precision instruments and equipment; clocks and watches; musical instruments; parts of and accessories for the aforesaid articles
Cap. 90 Optical, photographic, cinematographic, measuring, measuring, medical or surgical instruments and apparatus, precision instruments and equipment; parts of and accessories for the aforesaid articles
Cap. 90 Optical, photographic, cinematographic, metrological, testing, medical or surgical instruments and equipment, precision instruments and equipment; parts and accessories for the aforesaid articles