Benzalkonium chloride compound crystal form, preparation method and composition

The invention discloses a benzalkonium chloride compound crystal form, a preparation method and a composition, and belongs to the technical field of disinfectants. Comprising a crystal form A, and/or a crystal form B, and/or a crystal form C, and/or a crystal form D; crystal form A shows an X-ray powder diffraction pattern comprising at least one characteristic peak, wherein the characteristic peak is selected from 2theta of about 8.6 DEG to 53.6 DEG. The crystal form A, the crystal form B, the crystal form C or the crystal form D in the benzalkonium chloride compound disclosed by the invention have good water solubility and high purity, the content of impurities in an aqueous solution is reduced, the impurities can be reduced from conventional 1000-5000ppm to 0-100ppm, the solubility and the use safety of benzalkonium chloride are greatly improved, the use range of benzalkonium chloride is expanded, and the benzalkonium chloride compound has a good application prospect. The disinfectant is especially suitabl