The “copy-paste” catastrophe

(Why reusing old data can put you on the fast track to a regulator’s desk) 

A client in the industrial cleaning sector had a new product ready to go. 

It was a minor variation of an older mixture — just a tweak in composition, a fragrance change, and a new market segment. 

“We’ve got a PCN from a similar product,” their regulatory lead said. “We’ll copy that, swap the name and UFI, and we’re good.” 

I paused. 

“Are you sure the formulation hasn’t changed in any other way?” 

“Just a few percentages. Same components though.” 

They sent me the submission draft, new composition of the product and new SDS 

At first glance, it looked fine. 

But when I compared the new SDS and the actual mixture breakdown with the submitted PCN data, there were discrepancies in three key areas: 

• A substance they no longer used was still listed in PCN submission.
• One ingredient had a concentration band that no longer reflected the actual content.
• And the classification hadn't been updated to match the revised mixture.  

To a regulator, this isn’t a minor error. It’s a misrepresentation. 

And when the notification doesn’t match the product on the shelf, that’s a trigger for investigation. 

I told them what they already suspected. 

“We have to resubmit.” 

They were frustrated. Understandably. 

They weren’t trying to cut corners. They were trying to save time. But in doing so, they copied something outdated, incomplete, and potentially non-compliant. 

What they thought would be a two-hour task turned into a two-week delay. 

The real lesson 

Copy-paste is not a compliance strategy. 

Every mixture is its own fingerprint. Even if it shares a formula with a past product, changes in classification, ingredient ranges, supplier documentation, or even market destination can alter what you need to submit. 

You wouldn’t copy an old invoice to send to a new client and leave the wrong price. 

So why do it with something regulators rely on to protect public health? 

When you copy PCN data, you’re not just duplicating information — you’re duplicating risk. 

What I recommend 

If you’re duplicating past notifications for new products, set up a checklist. 

Start with the actual formulation. Not the last one you think you used. The real, current one. 

Then check: 

• Are all substances still present and classified correctly?
• Have there been updates in harmonized classifications of the substances since your last submission?
• Does the SDS reflect the same concentration ranges as the PCN?
• Is there such a significant change in composition that a new UFI is required?

It takes 20 minutes to double-check. Or it takes weeks to fix once the warning email arrives. 

You pick. 

Final thought 

Shortcuts aren’t bad. As long as they’re earned. 

Copying something just because it looks similar is like using someone else’s house key because it “almost fits.” 

If you’re managing multiple mixtures and relying on templates, good. Just don’t let those templates become traps. 

Accuracy doesn’t take longer. Guesswork does. 

If you want a second set of eyes or a system that lets you scale without guessing, I’m here to help.