Dimethiconol can be combined with other molecules, such as the amino acids (arginine, cysteine and methionine) or fatty acids (behenic acid, stearic fatty acids from meadowfoam seed oil) or other compounds to form derivatives of Dimethiconol that are useful as cosmetic ingredients.
Ltd means limited liability, and this designation is implemented when the company starts its processes. An Ltd format is commonly used for small companies that have a limited number of owners, and it can be similarly associated with a Limited Liability Company (LLC) or a corporation.
Merely adding ltd. to the end of a business's name does not, in and of itself, limit liability. Rather, the company must appropriately be established in the first place, complying with the organizational laws of the jurisdiction where created.