Independent third-party

ISCC PLUS Mass Balance Certification

International Sustainability and Carbon Certification PLUS

Chemical-recycling feedstock attribute traceability + mass-balance accounting — de facto standard for brand green-procurement supplier qualification.

Issuer

ISCC System GmbH (Germany) · Audited by SGS China

Scope

5,000 t/y DMT + 1,600 t/y EG full capacity · Chemically recycled polyester monomer

Validity

2025-09 to 2026-09 (annual re-audit)

Cert. No.

ISCC-PLUS-CN-XXXX-2025

• •Feedstock traceability: waste PET flake + polyester fiber waste + BOPET trim (three sources)
• •Chain of Custody (CoC): Manufacturer-level certification
• •Mass balance unit: DMT + EG Co-product Mass Balance
• •Customer alignment: P&G / Coca-Cola / Unilever / Nestlé / L'Oréal green procurement lists

ISO 14067 Product Carbon Footprint (PCF) Report

Product Carbon Footprint Verification

Third-party verified life-cycle GHG emissions report — usable directly for customer Scope 3 disclosure and CBAM filing.

Issuer

SGS China · SGS-CSTC Standards Technical Services Co., Ltd.

Scope

DMT per-ton carbon footprint (cradle-to-gate)

Validity

Issued 2025-08 · Annual update

Cert. No.

SGS-PCF-2025-CN-XXXX

• •DMT per-ton PCF: 1.4 t CO₂e/t (PTA route baseline 2.8-3.2 t)
• •EG per-ton PCF: 0.9 t CO₂e/t (ethylene-based EG baseline 1.6 t)
• •System boundary: Cradle-to-Gate
• •Functional unit: 1 t polyester-grade DMT (CAS 120-61-6) · purity ≥99.9%
• •Life-cycle stages: feedstock → pretreatment → reaction → distillation → crystallisation → packaging

ISO 9001:2015 Quality Management System

Quality Management System

External certification of quality management across production, inspection, sales, customer service.

Issuer

China Environmental United Certification Center (CEC)

Scope

DMT / EG chemical-process production, sales and aftersales service

Validity

2024-12 to 2027-12 (annual surveillance audit)

Cert. No.

CEC-Q-2024-XXXX

• •Process control: 155-170 °C reaction T ±1 °C · 90-120 min residence
• •Inspection: per-batch COA covers 9 critical + 3 extended parameters
• •GC-FID / Karl-Fischer / ICP-MS / DSC / TGA full lab capability
• •Customer complaint: ≤24 h first response · ≤72 h resolution
• •Internal audit + management review: ≥1 cycle/year + non-conformance closure

ISO 14001:2015 Environmental Management System

Environmental Management System

Environmental aspect identification, compliance management, continual improvement — universal international environmental management standard.

Issuer

China Environmental United Certification Center (CEC)

Scope

DMT / EG production base — all production and office areas

Validity

2024-12 to 2027-12

Cert. No.

CEC-E-2024-XXXX

• •Catalyst closed-loop recovery: PolyCh-Z-201 chelating resin adsorbs ≥99.5% Zn²⁺ / Mn²⁺
• •Methanol recovery ≥99.5% recycled to reactor; wastewater discharge -64%
• •Energy -32% vs PTA route · water -21%
• •Waste PET 100% resource utilization (zero outbound incineration / landfill)
• •Emergency response: leak / fire / poisoning / pollution four-scenario drills

HAZOP + Safety Assessment (SA) Compliance

Hazard and Operability Study + Safety Assessment

Process hazard and operability study + safety assessment compliance review approved.

Issuer

Third-party safety assessment body (MEM China accredited)

Scope

DMT 5,000 t/y + EG 1,600 t/y plant full process

Validity

Approved 2024-09 · Re-audit on major change

Cert. No.

SA-2024-XXXX

• •GB/T 150 (China pressure vessel) + ASME VIII dual-code construction
• •30+ SIL-2 interlock loops · TÜV / Exida certified components
• •ATEX Zone 1 Cat 2G IIB T3 explosion-proof electrical
• •PSV + rupture disc 2-tier relief (set 0.5 MPa)
• •Plant-wide N₂ inerting (O₂ ≤4%) · zero incidents since commissioning

12 Core Invention Patents

12 Core Invention Patents · CNIPA Granted

Core IP matrix of chemical methanolysis process · 3 PCT international patents in regional phase.

Issuer

China National Intellectual Property Administration (CNIPA)

Scope

Catalyst / process / distillation / equipment / automation — 5 directions

Validity

Permanent (invention patents 20 years)

Cert. No.

ZL 2023.X.X / 2024.X.X (multiple)

• •Catalyst: Zn-Mn binary formulation + chelating resin recovery method
• •Process: low-T atmospheric methanolysis + 4-stage distillation + gradient crystallisation
• •Equipment: mobile skid plant + DCS intelligent control + IR impurity identification
• •Feedstock: PVC-contaminated PET pretreatment + polyester fiber waste adaptation
• •3 PCT international patents in EU / US / Japan regional phase

EU REACH Compliance

Registration, Evaluation, Authorisation and Restriction of Chemicals

Mandatory registration for chemical circulation in EU market; includes SVHC declaration and 16-section SDS compliance.

Issuer

European Chemicals Agency (ECHA) · Registration agent: SGS

Scope

DMT (CAS 120-61-6) + EG (CAS 107-21-1) for EU export

Validity

Registered (no renewal needed)

Cert. No.

REACH-XXXXXXXX

• •DMT (CAS 120-61-6) REACH registered (≥10 t/y band)
• •EG (CAS 107-21-1) REACH registered (≥1,000 t/y band)
• •SVHC declaration: current list of 240 substances not detected in products
• •SDS (Safety Data Sheet) 16 sections bilingual CN/EN · updated every 18 months

Food Contact Grade Compliance (FDA + EFSA)

Food Contact Compliance · FDA 21 CFR 177.1630 + EFSA

Food-contact-grade PET packaging upstream DMT feedstock FDA + EFSA compliance verification.

Issuer

US FDA + EU EFSA · Third-party verified: Intertek

Scope

DMT for food-contact PET container upstream feedstock

Validity

Issued 2024-11 · Annual update

Cert. No.

INT-FC-2024-XXXX

• •FDA 21 CFR 177.1630 (PET resin food contact) DMT upstream compliance
• •EFSA Regulation (EU) No 10/2011 plastic food contact materials compliance
• •Migration test: water / acetic acid / ethanol / isooctane four simulants ≤0.01 mg/dm²
• •Heavy metal migration: Pb / Cd / Hg / Cr (VI) all ≤ detection limit
• •Customer applications: Coca-Cola bottle PET / Nestlé mineral water / infant bottle PETG