Shanghai Dejian Chemical is a professional disinfection and antimicrobial enterprise specializing in the development, production, sales, and technical support of a series of polyhexamethylene guanidine (PHMG and PHMB) products. These include polyhexamethylene guanidine liquid, powder, solid blocks, flakes, as well as hydrochloric acid-type, propionic acid-type, and phosphoric acid-type polyhexamethylene guanidine series. The products meet relevant EU standards and are exported to Europe, America, and the Asia-Pacific region. The polyhexamethylene guanidine produced by Shanghai Dejian Chemical is an environmentally friendly polymeric bactericidal disinfectant. It features broad-spectrum sterilization, low effective concentration, fast action, stable properties, excellent water solubility, usability at room temperature, long-term bacteriostatic effects with no side effects, non-corrosiveness, colorless and odorless qualities, non-toxicity, non-flammability, safety in use, moderate pricing, and convenient transportation—making it an excellent bactericide. It is widely used in fields such as sanitary disinfection, water treatment, hygiene products, textiles, plastics, aquaculture, and agricultural planting. Shanghai Dejian Chemical leads in polyhexamethylene guanidine antimicrobial technology. As a well-known enterprise specializing in the production and promotion of polyhexamethylene guanidine, it enjoys a strong reputation in the industry. The company has been invited multiple times to participate as an editorial member in formulating standards such as the "Technical Specification for Hospital Disinfection," "Technical Specification for Disinfection in Public Places," and "Technical Specification for Infectious Disease Disinfection." It is also honored to serve as a council member of the Shanghai Disinfection Products Association, committed to promoting safe, environmentally friendly green antimicrobial agents for broader application fields.