The substance is an ester quartz, which has a softening and anti-static effect. It is used in conditioner, where it makes the hair easier to comb out and in fabric softener, where it softens the clothes.
The substance is a preservative used in cosmetics. It is difficult to avoid preservatives in personal care and cleaning/washing since water give rise to good growing conditions for bacteria’s, fungus and mold. If microorganisms are allowed to grow this could, besides destroying the product and limit the durability, also result in a risk for infection for the consumer.