To learn how to interpret a certificate of analysis from an Indonesian kratom exporter, read the document in five layers: batch identification, alkaloid content, heavy-metal limits in parts per million (ppm), microbial counts in colony-forming units per gram (CFU/g), and the testing laboratory’s accreditation number. A genuine Certificate of Analysis (COA) ties every result to one specific lot of Mitragyna speciosa and to a named, accredited laboratory — not a generic template you could copy across shipments. This guide walks through each line so you can evaluate any COA a supplier hands you, whether you are buying for the United States (the world’s largest kratom market) or another destination.
What is a kratom Certificate of Analysis (COA)?
A COA is a laboratory report that documents the tested composition and safety parameters of a specific production batch. For kratom — a botanical native to Kalimantan (Borneo) and exported in large volumes from Indonesia — a proper COA covers plant identity, alkaloid concentration, and contaminant screening. It is a quality-control (QC) document, not a marketing sheet. Read this way: a COA tells you what a lab measured in a sample, on a date, using a stated method. It does not describe what the material does, and no honest exporter uses a COA to make health or efficacy claims. Its job is to help you verify consistency and cleanliness before you commit to a wholesale order.
How to interpret a certificate of analysis from an Indonesian kratom exporter, line by line
Work top to bottom. Every section below should appear on a complete document, and each result should carry a unit and, ideally, a reference limit or method.
1. Document header and batch identification
Start at the top. A trustworthy COA states the product name and form (for example, powder or cut leaf), the botanical name Mitragyna speciosa, a unique batch or lot number, the sample quantity, the date of sampling, and the date the report was issued. The batch number is the anchor — it must match the lot number printed on the drums or bags you receive. If a COA has no lot number, or the number does not reconcile with your shipment paperwork, treat it as unverified.
2. Alkaloid content (mitragynine and 7-hydroxymitragynine)
This section reports the concentration of the plant’s characteristic alkaloids, usually as a percentage by weight (% w/w). The two you will see most often are mitragynine and 7-hydroxymitragynine. Dried Kalimantan leaf powder commonly shows mitragynine somewhere in the low single-digit percent range, with 7-hydroxymitragynine typically present only in trace amounts. Read these figures as identity and batch-to-batch consistency data — a way to confirm the material is what the label says and that one lot resembles the next. They are compositional measurements, not indicators of any effect. Be skeptical if the exact same alkaloid percentage appears on every batch you are shown; real botanical material varies with harvest and region.
3. Heavy metals (ppm limits)
Because kratom is a leaf grown in soil, heavy-metal screening matters. A COA should list at least the four regulated elements — lead (Pb), arsenic (As), cadmium (Cd), and mercury (Hg) — each with a measured value in ppm (equivalently mg/kg) and, ideally, a reference limit. Many buyers benchmark against the elemental-impurity limits in USP General Chapter <232> or the American Kratom Association’s GMP program; some markets are stricter still (for example, California’s Proposition 65 sets a tight lead threshold). The table below shows the shape of what you should expect to see, not a legal standard:
| Element | Typical COA field | Common reference basis |
|---|---|---|
| Lead (Pb) | Measured value in ppm vs. limit | USP <232> / Prop 65 (market-dependent) |
| Arsenic (As) | Measured value in ppm vs. limit | USP <232> / AKA GMP |
| Cadmium (Cd) | Measured value in ppm vs. limit | USP <232> / AKA GMP |
| Mercury (Hg) | Measured value in ppm vs. limit | USP <232> / AKA GMP |
The key is that numbers appear with units and are compared to a stated limit. A “pass” with no measured value tells you nothing. Confirm the exact caps against the standard your COA cites and the rules of your destination market.
4. Microbial counts (CFU/g)
Microbial testing screens for contamination introduced during growing, drying, or handling. Expect to see total aerobic microbial count (TAMC, sometimes shown as total plate count), total yeast and mold count (TYMC), and pathogen screens such as E. coli, Salmonella, and often coliforms. Counts are reported in CFU/g; pathogen results are usually reported as “absent” (for instance, absent in 25 g) or as a numeric limit. As with heavy metals, look for measured values against reference limits rather than a bare pass/fail stamp. High or unreported microbial figures are a reason to ask questions before ordering.
5. Laboratory accreditation number and methods
This is the line that makes the whole document credible. A COA should name the testing laboratory and cite its accreditation — most commonly an ISO/IEC 17025 accreditation number issued by a recognized body. That number signals the lab is independently assessed as competent for the specific tests it performed, with traceable methods and calibration. The report should also reference the analytical methods used: HPLC or LC-MS/MS for alkaloids, ICP-MS for heavy metals, and standard culture-based methods for microbials. If you want to go deeper on evaluating labs, see our guide to choosing laboratories for kratom testing, which covers accreditation, methods and reputation in detail.
What are the red flags on a kratom COA?
Once you know the structure, problems become easy to spot. Watch for:
- No batch or lot number, or a number that does not match your shipment.
- No named laboratory, or a lab you cannot independently verify and no accreditation number.
- Pass/fail with no numeric results — units and measured values should be present.
- Identical alkaloid percentages across every batch, which suggests a reused template.
- Missing or old issue date, so you cannot tell which harvest the data represents.
- An accreditation logo without a certificate number you can check with the accrediting body.
A supplier who understands compliance will expect these questions and answer them plainly. That transparency is itself a signal. If you are still comparing vendors, our overview of what makes a licensed, compliant kratom export company explains the documentation and sourcing practices worth confirming before a first order.
Does a COA prove the product is legal in my country?
No. A COA documents composition and safety testing; it does not determine legal status, and it cannot promise how a shipment will clear customs. Kratom’s legality varies widely by jurisdiction and changes over time, so every result below should be re-verified against current rules before you import. As examples, as of 2026: in the United States, kratom is not banned at the federal level but is prohibited in several states (including Alabama, Arkansas, Indiana, Rhode Island, Vermont, and Wisconsin) and in some counties or cities, while other states have passed Kratom Consumer Protection Acts. The United Kingdom restricts sale for human consumption under the Psychoactive Substances Act 2016, Australia treats mitragynine as a prohibited (Schedule 9) substance, and several EU member states impose bans or controls. Thailand moved to decriminalize kratom in 2021. On the export side, Indonesia continues to permit kratom exports under an evolving regulatory framework as of 2026 — and because these frameworks can shift, you should always verify current rules with the relevant authorities in both the origin and the destination country. Treat any supplier who guarantees customs clearance or claims regulations will not change with caution.
About Bali Kratom Export
Bali Kratom Export is part of Juara Holding Group — operating from Bali across Indonesia since 2015 — and we position ourselves as an honest wholesale information source: verifiable QC documentation, batch-level COAs, and straightforward logistics guidance, without health claims or regulatory promises we cannot keep. Pricing we share is indicative only and depends on grade, volume, and shipping terms at the time of quotation. If you are planning your first order, review our notes on Bali kratom minimum order quantity so we can align a sample COA and a quote to your actual requirements.
Want a real batch COA reviewed line by line before you commit? Message our BD team directly on WhatsApp at +62 811-3941-4563 or email [email protected], and we will walk you through the document, the accreditation, and the sourcing behind it.