Isn't this what you use for sorb?
Barrels of sodium hydroxide wash ashore
Posted: 9:04 AM
Last Updated: 2 minutes ago
LAKE WORTH, Fla. - Six barrels believed to contain sodium hydroxide washed ashore between Palm Beach and Manalapan Monday, according to Palm Beach County Fire Rescue.
They were later picked up by the Department of Environmental Protection.
According to the National Institutes for Health sodium hydroxide is an odorless, white solid that absorbs moisture from the air. It is used to make textiles, cellophane, and pulp and paper, in soaps and detergents, and for etching and electroplating.
It is not clear where the barrels came from.
Fire rescue said the barrels did not leak.
Wikipedia: This alkali is deliquescent and readily absorbs moisture and carbon dioxide in air.