IFRS S2 + NIS B-1 for Petrochemicals in Mexico: 2026 Guide
BMV and BIVA issuers face the unique challenge of simultaneously complying with IFRS S2 (CNBV) and NIS B-1 (CINIF) for the same fiscal year, implying two regulatory frameworks, two regulators, and potentially two external assurance processes. Without a centralized platform, companies end up with sustainability and finance teams operating in silos, collecting redundant data in non-auditable spreadsheets. The overlap between IBSO indicators and IFRS S2 metrics is significant but not total, requiring precise mapping.
Petrochemicals face the highest transition risk of all sectors under IFRS S1: IEA and IPCC scenarios project a 20-40% reduction in virgin plastic demand by 2040. PVC and polyethylene plants must undergo stranded asset analysis and the CFO must decide whether impairment is material under IAS 36 in conjunction with IFRS S1.
Why IFRS S2 + NIS B-1 Applies Differently in Petrochemicals
HSE Director and CFO of petrochemical groups listed on BMV with continuous process plants required to report IFRS S1/S2 to CNBV from 2026
Continuous process emissions (cracker, reactor) are the primary Scope 1 source but CEMS (Continuous Emission Monitoring Systems) meters rarely export data in GHG Protocol-compatible format
Volatile organic compounds (VOCs) and methane in vents and purges: GHG Protocol Industrial Processes requires direct measurement or process-specific emission factors — data SEMARNAT has not standardized
IFRS S1 requires transition risk analysis: virgin plastic demand under IEA NZE 2050 scenario falls 30%, impacting PVC and polyethylene plant valuation that the CFO must quantify
Scope 3 category 11 (use of product): plastics sold to packaging industry have end-of-life footprint that the petrochemical company must estimate under GHG Protocol Product Standard methodology
Critical IFRS S2 + NIS B-1 KPIs for Petrochemicals
| Required KPI | Data Source | Difficulty |
|---|---|---|
| Carbon intensity: tCO₂e per tonne of resin or chemical product produced | Direct combustion (Scope 1) | High 🔴 |
| Rate of fugitive emissions detected and repaired under LDAR program (% valves with leaks vs. total inspected) | Electricity bills (Scope 2) | High 🔴 |
| Energy consumption: GJ per tonne of product, broken down by source (natural gas, steam, electricity) | Cat 1 - Materias primas petroquímicas (nafta, etano, propano) | High 🔴 |
| Hazardous process waste generation (spent catalysts, solvents) in t/year with final destination | HR / payroll system | Medium 🟡 |
| Water intensity: m³ of process water (non-cooling) per tonne produced | ERP / accounting system | Medium 🟡 |
Hard-to-Collect Data in Petrochemicals
Fugitive emissions from valves, flanges and compressors in continuous process plants under LDAR (Leak Detection and Repair) — require periodic inspection with OGI infrared camera
Process-specific emission factor by resin type produced (HDPE, PVC, PET) differentiating process vs. combustion sources
Industrial steam purchased from CFE or cogenerator: correct classification as Scope 2 (heat/cold) per GHG Protocol Scope 2 Guidance 2015
That is why manual Excel-based processes will not pass the 2027 assurance. Without automated traceability, an external auditor cannot verify the completeness or accuracy of emissions data.
Checklist: 8 Steps to Comply with IFRS S2 + NIS B-1 in Petrochemicals
- 1
Mapping and reconciliation of all 30 IBSO indicators with IFRS S2 metrics requirements to avoid duplication of effort
- 2
Unified GHG emissions data collection for Scope 1, 2, and 3 serving both frameworks simultaneously without double measurement
- 3
Management of two distinct assurance processes: CNBV's limited assurance under IFRS S2 and CINIF's review under NIS B-1, ideally with the same auditor
- 4
Alignment of reporting calendars — the integrated sustainability report must meet both deadlines from a single data collection cycle
- 5
Implementation of robust internal controls over sustainability information capable of supporting third-party assurance under both frameworks from 2027
- 6
Connect data sources (ERP, meters, suppliers) to a centralized platform
- 7
Review with internal audit team and adjust consolidation perimeter
- 8
Generate report in CNBV/CINIF format ready for external assurance
How Climatta Automates IFRS S2 + NIS B-1 for Petrochemicals
Automated Collection
Eliminate spreadsheets in Petrochemicals. Climatta connects your systems and automatically collects Carbon intensity: tCO₂e per tonne of resin or chemical product produced and other critical KPIs.
Auditor-Grade Traceability
Every data point has source, date, and owner documented. The 2027 assurance auditor can trace every figure to its origin in your systems.
IFRS S2 + NIS B-1 Report Ready
Generates the report in the exact CNBV + CINIF format — tables, metrics, and narrative. No last-minute manual reformatting.
Onboarding in 4 Weeks
Climatta connects to Petrochemicals systems in 4 weeks. No months-long IT project or external implementation consultant.
FAQ: IFRS S2 + NIS B-1 in Petrochemicals
Ready to comply with IFRS S2 + NIS B-1 in Petrochemicals?
Climatta centralizes all data collection, generates the report in regulatory format, and leaves it ready for 2027 external assurance. No spreadsheets.