400ug/mL each component in Hexane. Standard contains: n-nonane(c9), n-decane(c10), n-dodecane(c12), n-tetradecane(c14), n-hexadecane(c16), n-octadecane(c18), n-eicosane(c20), n-heneicosane(c21), n-docosane(c22), n-tetracosane(c24), n-hexacosane(c26), n-octacosane(c28), n-triacontane(c30), n-dotriacontane(c32), n-tetratriacontane(c34), n-hexatriacontane(c36), n-octatriacontane(c38), and n-tetracontane(c40). Packaged in 25mL amber glass screw cap vial. Stores refrigerated. A NIST Traceable Reference Material.