ERA manufactures industrial reagents with tolerances of ± 0.5%, and will hold the certified value lot to lot within 0.5%. Our NIST-traceable reagents are shipped with a Certificate of Analysis and are homogenous at a 95% confidence interval. If you have been looking for a company to manufacture high quality, stable, consistent reagents for your specialized needs, please contact our reagent group today for a quote: or 1-800-554-2511. ERA manufactures many reagents for standard laboratory analysis as well as custom formulations to accommodate customer needs.