1000 ug/mL each component in P/T Methanol. Standard includes: n-pentane(c5), n-hexane(c6), n-octane(c8), n-decane(c10), n-dodecane(c12), benzene, ethylbenzene, 1-methylnaphthalene, MTBE, naphthalene, toluene, 1,2,3-trimethylbenzene, m-xylene, o-xylene and p-xylene. Stores refrigerated. A NIST traceable reference material. 4 x 1.5mL ampule pack.