Shandong Longchang Chemical Co., Ltd. is a core subsidiary of Changyi Longchang Biochemical Co., Ltd. The parent company was established in 1996 and is located in Shibu Economic Development Zone, Changyi City, Weifang, Shandong Province, China.

Backed by the parent company’s industrial foundation, Longchang Chemical has access to a modern 11,000-square-meter manufacturing site and advanced laboratories. The company employs 126 people, and technical personnel account for more than 30% of the team.

Our R&D and production teams work closely with the School of Chemistry and Molecular Engineering at Peking University, Qilu University of Technology, and other academic partners. Since opening a new laboratory in 2015, the company has made significant progress in photoinitiators, photopolymerizable monomers, fluorinated monomers, UV oligomers, and other light-curing materials.

The company follows ISO 9001, ISO 14001, and GB/T 28001 management requirements. It passed ISO quality-system certification and an environmental impact assessment audit in 2018, supporting responsible production, employee health, environmental protection, and consistent product quality.

Since 2019, a dedicated foreign-trade and digital-operations team has supported international customers. Products are now supplied to more than 20 countries. Longchang Chemical is committed to being a reliable chemical-solutions partner through integrity, practical service, innovation, and efficiency.