Selling perfumes with synthetic oils

I'm doing business of non alcoholic perfumes and Attars. The fragrances, which I sell come from a company in india (total hindus), keva fragrances. This company also uses synthetic animal derivatives such as civet oil, etc. in their perfume oils. They said, we can give halal declaration of any product, but did not show any halal certification.

Secondly, this company is partly owned by blackstone, a giant company of USA, which deals in real estate, credit, equity, etc. involving interest as well. My question is that whether it is preferable to sell their products to earn, as they are strict Hindus and might be involved directly or indirectly in interest also. Secondly, the use of synthetic animal derivatives in fragrances are halal to use and sell?