Carbon Reporting for the Chemical Industry: Scope 1, 2 and 3 Guide

Why Carbon Reporting Matters More in the Chemical Sector

The European chemical industry is responsible for approximately 8% of EU industrial greenhouse gas emissions. Chemical manufacturers, specialty chemical distributors, and process industry suppliers face a unique reporting challenge: they have complex Scope 1 process emissions alongside high energy intensity (Scope 2) and sprawling raw material supply chains (Scope 3 Category 1).

Enterprise buyers in automotive, pharma, and consumer goods now require their chemical suppliers to provide verified Scope 1, 2, and 3 emissions data as part of CSRD Scope 3 Category 1 reporting. This guide explains what to measure, what factors to apply, and how to structure your disclosure.

Scope 1 Emissions for Chemical Companies

Scope 1 covers direct emissions from sources owned or controlled by your organisation. For chemical companies, this includes:

Combustion emissions (most common for SME chemical distributors and formulators):

Process emissions (specific to chemical manufacturers): - Nitrous oxide (N2O) from nitric acid and adipic acid production - HFCs and PFCs from refrigeration systems and semiconductor chemical processes - CO2 from thermal decomposition (calcination, reforming) - Methane from chemical synthesis processes

For SME chemical formulators and distributors without primary synthesis, process emissions are typically zero or negligible — combustion and refrigerant emissions dominate Scope 1.

Refrigerant emissions require tracking annual charge weight × global warming potential (GWP). Common refrigerants:

Multiply charge weight in kg by GWP to get kgCO2e equivalent.

Scope 2 Emissions: Electricity and Steam

Scope 2 covers purchased electricity, heat, and steam. Chemical operations are energy-intensive — compressors, reactors, separation processes, and temperature-controlled storage all consume significant electricity.

Apply the market-based emission factor for your grid region:

Worked example — German chemical formulator: - Annual electricity consumption: 420,000 kWh - Grid factor (Germany): 0.380 kgCO2e/kWh - Scope 2 emissions: 420,000 × 0.380 = 159,600 kgCO2e = 159.6 tCO2e

If you purchase a renewable energy tariff backed by Herkunftsnachweise (Germany's REGO equivalent), your market-based Scope 2 factor drops to near zero.

Scope 3 for Chemical Companies: The Hardest Part

Scope 3 typically represents the majority of total emissions for chemical companies. The most material categories are:

Category 1 — Purchased goods and services (largest category) Raw materials carry significant embodied emissions. Spend-based estimates using DEFRA's supplementary conversion factors are the practical starting point. BASF and Dow publish product-level carbon footprint data (PCF) for key commodity chemicals — use supplier-specific data where available.

Approximate Category 1 emission intensities for common inputs:

Category 4 — Upstream transportation and distribution Chemical raw materials are typically transported by road tanker, rail tank wagon, or IBC. Apply DEFRA freight factors: HGV (average laden) 0.079 kgCO2e/tonne-km, rail freight 0.028 kgCO2e/tonne-km.

Category 5 — Waste generated in operations Chemical companies generate hazardous waste streams. Hazardous waste disposal by incineration or specialist treatment should be included; DEFRA 2023 factors apply for standard municipal waste streams.

Category 11 — Use of sold products For chemical manufacturers, the downstream use of your products can generate significant emissions (solvents, cleaning agents, propellants). This category is material for manufacturers but typically not reported by distributors.

What Enterprise Buyers Ask From Chemical Suppliers

When an automotive OEM, pharmaceutical manufacturer, or consumer goods company sends you a sustainability questionnaire, they typically request:

1. Total Scope 1 + 2 + 3 in tCO2e for your most recent full reporting year
2. tCO2e per tonne of product (product-level intensity, most relevant for chemical supply chains)
3. tCO2e per €1m revenue (economic intensity for spend-based Category 1 estimates)
4. GHG Protocol methodology statement confirming the calculation basis
5. Verification status — third-party assured or self-reported with tool reference

Response template for questionnaire fields:

> "Emissions calculated under the GHG Protocol Corporate Standard using DEFRA 2023 conversion factors. Scope 1: [X] tCO2e (combustion and process emissions). Scope 2 market-based: [X] tCO2e. Scope 3 (Categories 3, 5, 6, 7): [X] tCO2e. Total: [X] tCO2e. Reporting year: [YYYY]. Verification: DeCarbonOPS Carbon Passport — [verification URL]."

Chemical Industry Reduction Priorities

For chemical SMEs, the highest-impact actions are:

Scope 2 — switch to renewable electricity: Renewable tariffs backed by Herkunftsnachweise (Germany), REGOs (UK), or GOs (EU) eliminate market-based Scope 2 at low cost. For an energy-intensive formulator using 500,000 kWh/year in Germany, this removes ~190 tCO2e/year from reported emissions.

Scope 1 — refrigerant management: Implement a formal refrigerant management system with annual leak detection. Switching from high-GWP refrigerants (R-410A, R-134a) to low-GWP alternatives (R-32, R-290) reduces Scope 1 significantly.

Scope 3 Category 1 — raw material sourcing: Request PCF (product carbon footprint) data from key raw material suppliers. BASF, Evonik, and Lanxess all provide PCF certificates for commodity chemicals. Switching to bio-based or recycled feedstocks reduces Category 1 intensity.

Scope 3 Category 4 — modal shift: Where practicable, shift from road to rail for bulk raw material deliveries. Rail freight emits approximately 65% less per tonne-km than HGV road transport.

Generating Your Chemical Sector Carbon Passport

DeCarbonOPS calculates Scope 1 (combustion and refrigerant), Scope 2 (electricity, with country-specific DEFRA grid factors), and Scope 3 Categories 3, 5, 6, and 7 — covering the categories most chemical SMEs need for procurement questionnaire responses.

Enter your annual data once. DeCarbonOPS produces a Carbon Passport with a permanent verification URL that you can paste into SAP Ariba, Coupa, Jaggaer, or EcoVadis questionnaires as your methodology reference.

For the full chemical sector picture including Scope 3 Category 1 (raw materials) and Category 11 (use of products), you will need to supplement DeCarbonOPS with spend-based estimates — but the Scope 1, 2, and Scope 3 operational categories DeCarbonOPS covers are the minimum standard most enterprise buyers request.