At present, bismuth dyes still occupy an important position in the dye market. Second only to azo dyes. Especially in the case of dark dyes, it is dominated by fluorene structure dyes, especially on high-grade light-resistant dyes. In recent years, many researches, production and development of lanthanide dyes and their intermediates have made substantial progress, especially in the field of intermediates. 2-Methylanthraquinone Refined CAS No. 84-54-8 is an important lanthanide dye intermediate from which other guanidine intermediates such as 1-nitro-2-methylindole 2-Anthracenecarboxylic acid can be prepared. , 1-chloro-2-methylindole 1-Chloro-2-methylanthraquinone, methyl sulfonate Anthraquinonesulfonic acid, hydrazine carboxylic acid, and the like. In addition, he is an intermediate in pharmaceutical intermediates and cooking aids for pulp and paper. Domestic production of Tectochinon; Tectoquinone; b-Methylanthraquinone is divided into two steps, first the alkylation of alkylbenzene or substituted benzene with phthalic anhydride, followed by the use of concentrated sulfuric acid fuming sulfuric acid as a catalytic dehydrator, so the preparation process is endless the same.