Due to their unique fully or partially fluorinated structures, per- and polyfluoroalkyl substances (PFAS) are labeled as "forever chemicals." However, most fluorinated compounds do not fall under PFAS and lack environmental persistence and bioaccumulation properties. Accurately identifying whether a fluorinated compound is a PFAS is crucial for compliance and promoting a green supply chain. Professional PFAS structural analysis and identification services can help companies scientifically evaluate product properties and avoid potential legal and market risks.

Scientific Basis and Methods

1. OECD 2021 Global Consensus Definition: Utilizes the latest PFAS definition from the Organisation for Economic Co-operation and Development (OECD), requiring substances to contain at least one fully fluorinated methyl or methylene carbon unit (fully saturated with fluorine and not bonded to hydrogen, chlorine, bromine, or iodine).

2. Authoritative Academic Classification System: References the PFAS classification framework proposed by Buck et al. in 2011, dividing PFAS into perfluoroalkyl and polyfluoroalkyl categories, and identifies structures based on the formula CnF2n+1.

Identification Method: By analyzing the topological structure, chemical bond connections, and atomic substitution patterns of substances, we determine if they meet PFAS structural characteristics. For unknown complex or new substances, high-resolution mass spectrometry (HRMS) and nuclear magnetic resonance (NMR) are used for precise molecular structure analysis to determine their complete chemical structure.

Typical Substance Identification Examples

To illustrate the identification logic, here are examples of two typical substances:

Example 1: Non-PFAS Substance

• Characteristics: A fluorinated olefin compound with fluorinated carbon atoms directly linked to hydrogen or chlorine, lacking fully fluorinated methyl/methylene units.
• Identification Process: Compared to the OECD definition, the substance does not form -CF₃ or -CF₂- structures (carbon atoms are not fully fluorinated).
• Conclusion: This substance is not a PFAS. The company can declare product compliance but should still consider the environmental and health impacts of its fluorinated components (e.g., long-term effects on aquatic life).

Example 2: PFAS Substance

• Characteristics: A perfluorocarboxylic acid compound with -CF₃ end groups and multiple -CF₂- segments, all carbon-fluorine bonds are saturated without hydrogen/halogen substitution.
• Identification Process: Structural analysis shows fully fluorinated methyl and methylene units, meeting the OECD definition and the perfluoroalkyl characteristics in Buck's classification.
• Conclusion: This substance is a PFAS. The company needs to further assess its persistence, bioaccumulation, and toxicity, and address regulatory restrictions such as EU REACH and US TSCA.

Service Process and Core Value

• Structural Analysis and Comparison: Analyze the molecular and structural formula of the target substance, systematically comparing it with PFAS definitions.
• Cross-Verification with Multiple Standards: Utilize OECD definitions, academic classifications, and regional regulatory requirements to ensure scientific and widely accepted identification conclusions.
• Clear Conclusion Output: Provide clear identification reports (PFAS/non-PFAS) with structural basis and regulatory applicability explanations.
• Extended Compliance Support: For non-PFAS substances, assist in improving Safety Data Sheets (SDS); for PFAS substances, offer alternative solution consultations and compliance pathway planning.

Service Advantages

• Professionalism: Stay updated with PFAS regulatory developments such as EU REACH, US EPA, California AB1200, Canada SOR/2025-15, Japan Chemical Substances Control Law, Korea K-REACH, Australia NICNAS, and China's List of Key Controlled New Pollutants, helping companies proactively respond.
• Precision: Avoid misjudgment based solely on "fluorine content" by achieving scientific qualification through structural analysis.
• Applicability: Serve multiple fields including chemicals, polymers, surfactants, and specialty materials.

In an era of deepening global PFAS regulation, scientific and authoritative identification services are essential tools for companies to achieve compliant operations and sustainable development. Through structural analysis and standard comparison, companies can clarify product attributes and develop precise environmental strategies, providing solid support for the industry.

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