How CertDesk Verifies: Our Materials Methodology and Standards

CertDesk is a US product-compliance services desk for importers and sellers sourcing from China and Asia in regulated categories — children's products, food-contact goods and housewares, and cookware. It is operated by Kantor Materials International, a polymer materials company. This page explains who stands behind the guidance on this site, how we verify, and the limits of what our verification means.

Last verified June 14, 2026. CertDesk re-verifies its methodology pages quarterly.

CertDesk's compliance content and verification work are produced by Kantor Materials Research, the research function of Kantor Materials International, and reviewed by the company's founder, David Wu (LinkedIn). Kantor Materials is a polymer company first: its core business is sourcing, compounding, and verifying industrial and consumer-grade resins. CertDesk applies that materials capability to the import-compliance problem.

That origin is the point, not a footnote. For the products CertDesk covers, the regulated thing is usually the material itself — what the polymer is, what was blended into it, and what migrates out of it. Reading a material is what a polymer company does every day.

The verification market is crowded, but it leaves one layer untouched. A pre-shipment inspector confirms the product looks right, the count is correct, and the carton is labeled. A supplier-verification vendor confirms the company on the invoice is a real, registered legal entity. An issuing laboratory will confirm, for free, that a report number it assigned is genuine.

None of them tells you what the material is. None of them catches regrind blended into virgin resin after the certificate was issued, a substituted "equivalent" grade, or a genuine report number attached to the wrong product. That identification — FTIR for polymer identity, DSC and melt flow rate for grade consistency, ash and density for fillers — is material work. It is the gap CertDesk exists to close.

We are explicit about what our results are and are not, because in compliance the difference carries legal weight.

A Children's Product Certificate must rest on testing from a CPSC-accepted, ISO/IEC 17025-accredited laboratory — that is the law, and a diligence-grade screen does not substitute for it. What a screen does is tell you, cheaply and early, whether it is even worth paying for that accredited test. We never imply that our screen grounds a certificate it cannot ground. Where the law requires accreditation, we coordinate the accredited test rather than issue it.

We sort services by the cost of proof — which is also the order of legal weight. You buy only as far up the ladder as your situation requires.

1. Understand (free). Tools like the Deadline Checker that map which rules apply to your products and states. No determination is made yet.
2. Confirmed (document review). A human-reviewed read of your certificates and reports against what the rules require — the first liability-bearing determination.
3. Tested (material screening). Diligence-grade testing of the material itself at origin — polymer identity, regrind and filler checks — read against your TDS and purchase spec.
4. Certified (accredited). When a regulatory result is required, we route the test to an accredited partner laboratory and coordinate the certificate.

The model is to screen cheap at origin, then certify only what is ready — catch a non-compliant material in China, before the container ships, rather than after an entry is held at a US port.

Every compliance claim on this site is built on a primary source — the statute, the rule in the eCFR, the agency guidance, or the official filing — named and dated, not on secondary summaries or our own marketing. Regulations change, so each page carries a "Last verified" date and is re-checked on a quarterly cycle, with faster cadence on fast-moving areas such as state PFAS law. When we cannot verify a claim to a primary source, we say so rather than assert it.

• We never supply the products we review. CertDesk verifies, tests, and certifies; it does not sell the goods. That separation removes the conflict a supplier-verifier would otherwise carry.
• Diligence-grade is labeled diligence-grade. We do not present a screen as an accredited certificate.
• Information, not legal advice. Our guidance is general information for importers and sellers. Regulations change and apply to specific facts; confirm requirements against official sources or qualified counsel before acting.

To see the methodology applied, start with material compliance verification, or send us a document or material through the intake.

Is CertDesk an accredited testing laboratory?

No. CertDesk is a compliance services desk operated by Kantor Materials International, a polymer materials company. Our material screening is diligence-grade — it tells you whether a material matches its certificate and is appropriate for your own due diligence and general-use products. Where the law requires an accredited result, such as a Children's Product Certificate, we coordinate testing through a CPSC-accepted, ISO/IEC 17025-accredited partner laboratory rather than issuing it ourselves.

Why is a polymer company doing compliance verification?

Because for plastic, food-contact, and children's products, the compliance risk is in the material — and identifying a material is our native work. Inspectors verify that a product looks right; company-verification vendors confirm a supplier is a real legal entity; issuing labs confirm a report number. None of them identify the resin. A polymer company can read a TDS, spot a regrind signature, and judge a filler loading — which is the layer where these compliance failures actually live.

Does CertDesk supply the products it reviews?

No, and that separation is deliberate. CertDesk verifies, tests, and certifies — we never supply the products we review. A verifier who also sells you the goods has a conflict; we keep the two apart so our reading of a material carries no incentive to find it acceptable.