No. p-Xylene (CAS 106-42-3) is not currently listed as a chemical substance subject to TSCA section 12(b) export notification in 40 CFR 707.60. The statutory trigger under 15 U.S.C. 2611(b) is confined to chemical substances or mixtures for which EPA has proposed or promulgated a rule under TSCA section 4, 5, or 6, or has issued an order under section 5(e) or 6(b); the codified list at 40 CFR 707.60 does not include p-xylene. Therefore, no TSCA section 12(b) export notification is required solely because the substance of concern is p-xylene. Mixture-level exports do not change this result for the p-xylene component: the 12(b) obligation attaches only to listed components, and p-xylene is not such a component in the current rule text.

The regulatory status of p-xylene under TSCA section 12(b) must be separated from its status under other TSCA instruments. p-Xylene remains a TSCA Inventory substance listed under 40 CFR 710, and its manufacture or importation may be reportable under the Chemical Data Reporting rule at 40 CFR 711 when applicable production-volume thresholds and exemptions are evaluated. It may also be subject to premanufacture or significant new use restrictions where a separate section 5 order or rule specifically identifies p-xylene, but no such entry appears in the export notification list at 40 CFR 707.60. The absence of a section 12(b) listing does not exempt p-xylene from other TSCA section 6 restrictions, state-level VOC requirements, or downstream environmental release obligations.

Operationally, the TSCA 12(b) list is chemical-specific and rule-specific; it is not a generic hazard list or a generic VOC export control list. The compliance check for an export transaction involves verifying each component CAS number against the current eCFR text of 40 CFR 707.60, including any amendments published in the Federal Register after the annual edition. Published data for p-xylene-specific 12(b) notification case history is limited, but the absence of the CAS number from the codified list is dispositive for current export notification classification. An exporter that relies only on TSCA Inventory status or CDR reporting status would misclassify the 12(b) obligation, because those instruments do not activate section 12(b) requirements.