Uses: Polyoxyethylene Stearate used as an emulsifier, stabiliser. Used in bakery products, puddings, etc. No known side effects in the concentrations used. Ethylene oxide is a known detergent made from gas and petroleum, so additions of it can cause health issues.
These compounds (E430-E436) contain fatty acids, which are nearly always from vegetable oils; however, use of animal fat (including pork) cannot be fully ruled out.
Chemically, the origin of these compounds cannot be determined; only the producer may provide information on the origin.