COA & Batch Documentation: Proof That Ships With Every Batch
Channels ask for proof; most suppliers email a PDF after three follow-ups. This playbook turns the release COA and documentation pack into a sales asset the channel can pull itself.ned COA and documentation system turns compliance into a self-service sales asset.
01 · The problem
Channels and buyers increasingly demand documentation with the shipment — COAs, characterization summaries, retain-sample plans — and most suppliers answer with a reluctant PDF after three emails. The documentation system answer: a designed release COA (fixed panel), characterization summaries, retain samples per batch, and channel self-service access. Put the pack in the buyer's hands before they ask for it.
02 · Scientific rationale
The release COA carries a fixed panel: particle-size distribution and concentration (NTA, per the national measurement guideline [4]), endotoxin, sterility/microbial limits, and batch identification — with the characterization summary alongside. Retain samples are kept per batch for the program life. The panel follows MISEV2018-aligned logic [2] and the process anchors from published industrial guidance [4].
03 · Program documentation
COA templates and retention plans are part of TONGNIAN's internal QC documentation [6].
Method anchors: [1] EV biology and cargo [2] MISEV2018 characterization [3] category evidence (review or registered study) [4] formulation and handling guidance [5] national measurement guideline (2026 No. 17) [6] internal protocol and case documentation.
04 · Product architecture
| Document | Content | Serves |
|---|---|---|
| Release COA | Fixed panel, per batch | Channel onboarding |
| Characterization summary | Size, concentration, morphology | Diligence passes |
| Retain-sample plan | Per-batch retention | Dispute and audit |
05 · Process & QC
Documentation is generated at batch release and stored per batch; channel partners receive the pack with every shipment. QC per the standard panel [2][5].
Fig. 1 — The documentation pack: COA, summary, retention.
06 · Regulatory pathway: EU & US first
The documentation set is route-neutral and serves EU (CPSR support), US (MoCRA listing support), and professional channels simultaneously.
07 · Expected outcomes
- Self-service trust: channel partners download the documentation pack themselves instead of filing a request.
- Audit readiness: retain samples close the dispute path.
- Sales asset: the COA is quoted in decks, not hidden.
No claims beyond the destination-market framing — authority comes from documentation and batch measurement.
08 · Commercial framework
Sample kits in 3-5 days; pilot from 500 units; production from 2,000 units; standard lead 15 workdays - all indicative, quoted per request. White-label and program naming run through the OBM program.
Request a quote. Each program page carries its own line fact-sheet.
References
- Kalluri R, LeBleu VS. The biology, function, and biomedical applications of exosomes. Science. 2020;367(6478):eaau6977.
- Théry C, et al. MISEV2018. J Extracell Vesicles. 2018;7(1):1535750.
- Cobetter. Exosomes Part I: Applications and Downstream Processing Overview. Technical review, 2025.
- Guideline for Exosome Particle Size and Concentration Measurement (2026 No. 17) — TONGNIAN, drafting organization.
- TONGNIAN internal process documentation — closed-line SOPs, QC panels, batch records (partner access under NDA).
Apply this playbook to your category
Submit your brand stage, target category, and target volume tier to receive specifications, MOQ, and lead-time quotes for the matching tier (quotation follows the tier structure).