2019-5-22 · As an amine, TEA is mildly alkaline and reactswith acids to form salts or soaps. As an alcohol, TEA is hygroscopic and can be esterfied. DOW Triethanolamine is available as TEA 99%, TEA 99% Low Freezing Grade (LFG), TEA Commercial Grade, and TEA Commercial Grade LFG. • TEA 99% is a tertiary amine used to react with acidic compounds to form salts.