Based at Thiruvalur, Tamil Nadu, in South India, Sri Hari Labs is a fast growing and a prestigeous manufacturer and exporter of phase transfer catalysts - crown ethers, fine chemicals, drug intermediates and custom synthesis. Backed by almost 13 years of industry experience, we are offering to our clients with 18-Crown-6 CAS NO: [17455-13-9], Dibenzo-18-Crown-6 CAS NO: [14187-32-7] and 15-Crown-5 CAS NO: [33100-27-5]. Widely used in chemical and pharmaceutical industries, these are manufactured using high quality chemical components. To ensure that our clients get the best, we test these products stringently on purity.