Interesting question. Obviously the modern version of the soap (which you can still purchase occasionally at Caswell Massey) has a few extra ingredients that weren't even invented when the soap was first manufactured. However, the basic "recipe" is listed on the package. Tallow, glycerine, petrolatum (like Vaseline), mineral oil, boric acid and fragrance. The box itself refers to the soap as "Boracic & Cold Cream Bath Soap." Interestingly enough, Vinolia Otto Bath Soap was a product of the A&F Pears Ltd. in London. Grandson of the founder, Thomas Pears, and his family were aboard Titanic. Thomas Pears did not survive.What ingredient Vinola contains ?