What type of container must be used for acid or alkali wastes?

• A. Cloth container
• B. Metal drums
• C. Polyethylene Drums
• D. Fiber drums

Answer: (C)

When storing acid or alkali wastes, pick a container that will not react with or be weakened by the waste. The key is chemical compatibility and corrosion resistance. Polyethylene drums provide that safety edge because polyethylene (HDPE) is resistant to many acids and bases, so it stays inert and won’t corrode or contaminate the waste. This reduces the risk of leaks and exposure and is cost-effective and readily available for proper waste containment.

In contrast, metal drums can corrode or pit when in contact with strong acids or caustics, which can lead to leaks or contamination. Cloth containers lack chemical resistance and can degrade or absorb liquids, making them unsafe for corrosive wastes. Fiber drums can also degrade or absorb corrosive liquids, compromising containment. For these reasons, polyethylene drums are the appropriate choice for acid or alkali wastes.