The REACH paperwork that actually matters — and the kind that just looks reassuring

A supplier datasheet with a REACH registration number printed on it is one of the most reassuring-looking pieces of paper in this industry — and one of the easiest to over-trust. A registration number on its own confirms very little about what you actually need confirmed: that the substance, at the tonnage band you're buying, for the use you have in mind, is properly covered.

What the number alone doesn't tell you

REACH registrations are tied to specific tonnage bands and, in many cases, specific uses further down the supply chain. A registration that's valid for a 10–100 tonne band doesn't automatically extend to a buyer who needs 500 tonnes a year from that same supplier — and a registration covering an industrial use doesn't automatically extend to a consumer-facing application. Neither of those gaps shows up just by glancing at a registration number on a certificate.

• Ask for the actual tonnage band the registration covers, not just confirmation that "it's registered."
• Ask whether your specific intended use is listed in the registration's exposure scenarios — or whether it would need to be added.
• Ask who the Only Representative or EU-based registrant actually is, if the manufacturer itself sits outside the EU — that's the entity legally on the hook.

None of this is about distrust — most suppliers who say they're REACH-compliant genuinely believe it. It's about the fact that "registered" is a broader word than most buyers assume, and the specifics underneath it are what actually determine whether a shipment can legally move.