Aoji-ri Chemical Complex

The Aoji-ri Chemical Complex is a large industrial complex in Haksong-ri (formerly Aoji-ri), Kyŏnghŭng county, South P'yŏngan province, North Korea, which produces about 51 different products, including methane (35,000 tons per year), ammonia (26,000 tons per year), ammonium bicarbonate (100,000 tons per year), and coal tar derivatives (15,000 tons per year). It also allegedly produces blood agents and vomiting agents, including Adamsite.

The Chosen Synthetic Oil Company (朝鮮人造石油株式会社) opened the complex in 1937, originally to produce synthetic oil from the high-quality bituminous coal mined in the area. After the establishment of North Korea, the company was nationalised.

The facility is served by the Korean State Railway via Hoeam station on the Hoeam Line.