GJ Chemical What We Do G.J. Chemical Company is a family-owned and operated, women-owned business based in Newark, New Jersey. For nearly 50 years, G.J. Chemical has served chemical distributors, laboratories and a variety of end users, earning a reputation as a responsive, leading supplier of high quality, high purity chemical products and custom services. G.J. Chemical capabilities include testing, bulk storage, repackaging, liquid bulk handling, custom blending, purifying, stabilizing and more.