Ozone Precursor Mixture/PAMS has 57 components.

Acetylene, benzene, n-butane, 1-butene, cis-2-butene, trans-2-butene, cyclohexane, cyclopentane, n-decane, m-diethylbenzene, p-diethylbenzene, 2,2-dimethylbutane, 2,3-dimethylbutane, 2,3-dimethylpentane, 2,4-dimethylpentane, n-dodecane, ethane, ethylbenzene, ethylene, m-ethyltoluene, o-ethyltoluene, p-ethyltoluene, n-heptane, n-hexane, 1-hexene, isobutane, isopentane, isoprene, isopropylbenzene, methylcyclohexane, methylcyclopentane, 2-methylheptane, 3-methylheptane, 2-methylhexane, 3-methylhexane, 2-methylpentane, 3-methylpentane, n-nonane, n-octane, n-pentane, 1-pentene, cis-2-pentene, trans-2-pentene, propane, n-propylbenzene, propylene, styrene, toluene, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, 2,2,4-trimethylpentane, 2,3,4-trimethylpentane, n-undecane, o-xylene, m/p-Xylene (combined)