This double reaction is carried at a low cost, but precaution is required to control the
conditions and avoid side reactions. Sulfated monoglycerides which are neutralized by an
ethanolamine are excellent foaming agents, even with a C18 chain. This is remarkable since
alkyl-sulfates are foaming agents only with short C12-C14 chain, i.e., a lipophilic group which
comes from coconut oil, and thus a raw material much more expensive than tallow (C16-C18).