China Production Chemicals manufacturers Our History Dongying City Dayong Petroleum Additives Co.,Ltd. with independent legal personality锛孍stablished on 2 December 2005. Registered capital reached 15 million CNY. Passed ISO9001 quality, ISO14001 environment, ISO 45001occupational health and safety integration management system certification in 2022. Located at South of Yongxin Road, Kenli District, Dongying, Shandong Province, China. The company is a chemical enterprise integrating research & development, production, and sales. http://www.dayong-chemical.com/
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