- CEO
- Seung-Ho Ryu
- Full Time Employees
- 277
- Sector
- Process industries
- Industry
- Chemicals: major diversified
- Address
- 84, Sapyeong-daero Seoul SL South Korea 6575
- IPO Date
- May 31, 2023
- Business
- ISU Specialty Chemical Co., Ltd. (457190.KS) manufactures and sells fine chemicals and all-solid-state battery materials. Founded in 1969 and headquartered in Seoul, South Korea, the company produces core products including T-dodecyl mercaptan (TDM) for controlling molecular weight in ABS, SBR, and SB-latex polymers as well as extreme pressure additives in gear oil, grease, and metal processing oils; n-dodecyl mercaptan (NDM) and normal octyl mercaptan (NOM) for tire antioxidants and artificial marble production; high-purity isopropanol (IPA) used in paints, printing inks, and hand sanitizers; D-SOL de-aromatized naphthenic solvents such as MD-20, D-30, D-110, D-130, D-3035, and D-3135 for metalworking fluids, printing inks, battery recycling solvents, dry cleaning, low-odor paints, cutting oils, aluminum rolling oils, anti-rusting oils, underbody waxes, plasticizer diluents, insect aerosols, silicone sealants, drilling oils, explosive lubricating oils, candle oils, flocculants, EDM oils, and textile oils; and lithium sulfide (Li2S) as the core precursor for sulfide-based solid-state battery electrolytes and lithium-sulfur battery cathode materials. The company operates primarily in South Korea with a production plant in Ulsan and supports global markets through its service network, targeting industries such as automotive interiors, home appliances, nitrile gloves, petrochemicals, and advanced energy storage. Formerly a subsidiary of ISU Chemical Co., Ltd., it listed on the Korea Stock Exchange in May 2023; recent developments include advancing commercial-scale production of high-purity lithium sulfide via the PureLi2S technology in partnership with KBR, following successful pilot operations in 2025 to support all-solid-state batteries with improved energy density, safety, and efficiency; commencing construction of a 150 metric ton per year lithium sulfide facility in Gumi with an 85.2 billion won investment in 2025, expandable for mass production by 2027; and planning a 300 billion won investment from 2025 for lithium sulfide commercialization in response to growing demand.