1. **Shipbuilding and Marine Engineering:**
It was formerly a core component of antifouling paints for ships, releasing toxic ions to kill or repel marine organisms such as barnacles and algae that attach to the hulls of ships and offshore facilities such as drilling platforms, thereby reducing drag and fuel consumption.

2. **Textile and Paper Industries:**
It was used as a mildew inhibitor in textiles such as tent fabrics and outdoor clothing, as well as in paper products such as archival paper and packaging paper. It prevented mold growth in these materials in humid environments, maintaining their physical properties and appearance. Currently, less toxic isothiazolinone-based mildew inhibitors are used in this field.

3. **Chemical Synthesis:**
On the one hand, it can be used to synthesize organotin polymer resins; on the other hand, it can activate oxygen and nitrogen, facilitating various organic reactions such as aminosulfonation and acylation. It can also assist in pyridine nucleoside synthesis and the selective acylation of polyols, and is also a raw material for the production of some fine chemical products.

4. **Agriculture:**
It was previously used to control fungal diseases in crops such as rice and fruits, and also for seed treatment to inhibit mold infection, thus ensuring crop growth and seed germination rates. However, due to its extreme toxicity to soil microorganisms and aquatic organisms, its use in agriculture has long been prohibited.

5. **Industrial Circulating Water Treatment:**
It was used for sterilization of circulating water in industrial cooling systems, inhibiting the growth of microorganisms in the water and preventing pipeline blockage or corrosion problems caused by microbial attachment. Currently, it has been replaced by safer bactericides such as chlorine-based disinfectants.

6. **Other Industrial Fields:**
It can be used as a fumigant and rust inhibitor in relevant industrial production, and can also be added to products such as inks to improve their stability and performance. However, these applications are also gradually being replaced by less toxic alternatives due to toxicity concerns.