Grading and documentation you can audit.
AUDIT PROTOCOL: GUANZHU METROLOGY
Agarwood is a natural material with wide variation. We make that variation visible before you buy.
Standardized physical grading matrix
Fig 1.1: Photographic validation of density stratification in pure deionized water. High-resin heartwood sinks cleanly to vessel floor with zero agitation.
Fig 1.2: Calibrated laboratory immersion workstation at Guanzhu. Density is gravimetrically calculated by dry mass divided by Archimedean fluid volume displacement.
Grades are confirmed per batch; natural variation applies. Every lot undergoes hydro-immersion metrology before packing.
Immutable custody sequence
Plot
GPS-mapped mother grove in Guanzhu, Dianbai. Soil assay and Aquilaria sinensis cultivar lineage logged.
Harvest
Core-heartwood harvest from registered Dianbai cultivation groves. Inoculation and resin maturation duration logged (3–5 yrs).
Intake
Dianbai pilot workshop gate reception. Digital micrometer sorting, moisture sensor read, raw density triage.
Batch
Assignment of unique alphanumeric lot ID, internal GC-MS screening, archival sample decanting.
Shipment
CITES Appendix II verification, phytosanitary treatment, customs sealed tamper-evident dispatch.
Batch OH-2026-001 · Guanzhu Reserve Block 03
Cultivated Aquilaria sinensis · Grade: Sinking AAA (1.042 g/cm³)
Fig 2.1: Micro-photomicrograph of Batch OH-2026-001. Dark, unctuous resin fully saturates radial xylem ray parenchyma. Intercellular canals show zero artificial dyes, paraffin, or heavy metal salts.
Standard & on-request laboratory assays
GC-MS Testing (Gas Chromatography-Mass Spectrometry)
Comprehensive volatile terpene profile, agarotetrol percentage, and adulterant screening. Includes authentic chromatogram scan.
Moisture Content Metrology
Halogen balance moisture determination (calibrated to ≤ 10.0% standard) to prevent weight decay or fungal degradation during transit.
Microbial & Pathogen Screening
Third-party CNAS/CMA accredited laboratory testing for aerobic plate count, yeast, mold, and target bacterial pathogens.
Heavy Metals Analysis
Inductively Coupled Plasma Mass Spectrometry (ICP-MS) measuring Lead (Pb), Arsenic (As), Cadmium (Cd), and Mercury (Hg) against EU Cosmetic Directive & US FDA MoCRA benchmarks.
Export documentation & compliance dossiers
100% legal cultivated origin with full CITES Appendix II documentation.
Unlike illicit wild-harvest agarwood subject to international trade bans and customs confiscation, all Oud Harvest allocations are legally harvested from registered Aquilaria sinensis cultivated groves. Every commercial consignment departs with endorsed CITES Appendix II export permits, CCPIT Certificates of Origin, and official plant health quarantine dossiers to support prompt import clearance in GCC, EU, UK, and Asian customs jurisdictions.
CITES Export Permit
Appendix II artificial propagation (Source Code A) export permit issued by National Endangered Species Import and Export Management Office.
Certificate of Origin (COO)
Issued by CCPIT or China Customs for tariff verification, paired with Dianbai Forestry Bureau raw material origin proof for CITES chain of custody.
Phytosanitary Certificate
National customs plant quarantine inspection validating zero pest or fungal vectors.
Fumigation Certificate
Professional non-residue atmospheric treatment for international biosecurity compliance.
Commercial Invoice
Precise HS Code classification (1211.90.99 / 3301.90), declared commercial value and lot weights.
Packing List
Detailed crate-by-crate breakdown with tamper-evident serial numbers and net/gross tare weights.
Transparent institutional commitments
Documents we can provide
- check Certificate of Analysis (COA): Batch GC-MS curves, relative density, and moisture indices issued by CNAS/CMA-accredited testing laboratories.
- check CITES Appendix II Export Permit: Consignment-specific export permits issued under Source Code A (Artificially Propagated).
- check Forestry Legal Origin Dossier: Dianbai Forestry Bureau planting registration, felling permit, and yield assessment certificates.
- check Safety Data Sheet (SDS / MSDS): Compliant with GHS and ISO 11014 for international air freight and maritime transport.
- check Quarantine & Origin Certificates: China Customs (CIQ) Phytosanitary Certificate, Fumigation Certificate, and CCPIT Certificate of Origin.
- check Market-Specific Files (On Request): IFRA conformity certificates, REACH compliance documentation, and Halal / ISO 9001 certificates where active.
Claims we do not make
- close No generic "CITES exemption": CITES Appendix II applies to all Aquilaria species; artificial cultivation specifies Source Code A, but never waives the statutory export permit requirement.
- close No destination customs guarantee: Exporting suppliers cannot control foreign border clearance. We provide verified, audit-proof export dossiers while destination clearance remains subject to importing country authorities.
- close No medical or health cure claims: We supply botanical raw commodities, aromatic materials, and pure extracts, never pharmaceutical drugs.
- close No wild-harvested wood: 100% of material originates from legally cultivated Aquilaria sinensis mother groves in Dianbai. Zero wild logging tolerance.
- close No unverified certifications: We never display unbacked organic, FSC, or FDA "approval" seals (the US FDA does not certify cosmetics or essential oils).
- close No artificial adulteration: Zero chemical aroma boosters, synthetic benzylacetone, paraffin impregnation, or toxic dye coloring.
Inspection window and reconciliation protocol
14-Day Inspection Window
Consignments subject to buyer hydro-testing and independent assay upon customs release.
Replacement & Refund Path
Direct replacement or credit note if batch density or moisture deviates beyond specified tolerances.
Independent Third-Party Testing
Option for sealed pre-shipment inspection at SGS / Intertek / CMA laboratories in Guangzhou or Shenzhen at buyer direction.
Standard reference documentation
COA Sample (Batch OH-2026-001)
Full GC-MS chromatogram, retention indices, sesquiterpene ratio, and adulterant-free laboratory certification.
Technical Spec Sheet
Standard density tables, mesh sizes, hydro-distillation yields, and moisture tolerance benchmarks.
CITES Export Checklist
Step-by-step import clearance guidelines, HS codes (1211.90/3301.90), and customs checklists for GCC, EU, and US.
Ready to audit our lots?
Request our complete documentation package, physical grade samples, or schedule a video review of our Dianbai workshop.