Persil is a brand of laundry detergent made by Henkel; but which is now also licensed for manufacture, distribution, and marketing in several countries by Unilever. Henkel and Unilever both manufacture their own formulations. Introduced in 1907, Persil is notable because it was the first commercially available "self-activated" laundry detergent. The name, Persil, is derived from two of its original ingredients, sodium perborate and sodium silicate. It is Unilever's premium brand in Ireland and the United Kingdom. Persil is sold in many forms, with several "environment friendly" products.