Zayo-Sigma (ZSA) Chemicals Limited is a Nigerian life-science and high-technology manufacturer and distributor headquartered at Zayo House on Yakubu Gowon Way in Jos, Plateau State, and its official pages describe a portfolio of biochemical and organic reagents, laboratory supplies and research essentials used across biotechnology, pharmaceutical development, diagnostics and academia; the company publishes head-office landline and mobile numbers, a central email address and lists branch offices in Abuja (Wuse Zone 5/Gwarinpa), Lagos (Ojota/Ikeja) and Kaduna.