“Bulk molasses has a specific gravity of about 1.3, and in cold weather thickens and becomes difficult to pump. When transferring cargo under the conditions noted, it should not be heated above 100 degrees F., in order to avoid sugar deposit.
Molasses tanks should be hosed down with sea water. It has been found that neither fresh water nor steam gives satisfactory results in the operation of cleaning the tanks and pipe-lines used in carrying molasses.”

Merchant Marine Officers’ Handbook by Edward A. Turpin and William A. MacEwen, Master Mariners. New York: Cornell Maritime Press, 1945.
p. 202-203