1. Problem: Moisture — The Silent Destroyer of Chemical Product Value For hygroscopic chemical products — including calcium chloride anhydrous, sodium metabisulfite, and activated carbon powder — moisture ingress during sea freight is not just a quality concern; it is a direct financial liability. The container environment during a typical 45-day Shanghai-to-Rotterdam voyage experiences temperature swings of 25-55°C (measured inside container at the equator crossing), driving