For Shopify stores selling perfume, nail polish, aerosols and batteries
Know which of your products are hazmat, and exactly what to declare.
HazFlag reads each product's safety data sheet and gives you the UN number, hazard class and whether Limited Quantity rules apply. Then it saves that on the product, so you buy the right label every time.
Free for the first stores. Built by a chemical engineer.
Getting hazmat wrong now costs real money.
USPS fee on a commercial package found carrying undeclared hazmat, since July 12, 2026.
USPS handling fee per declared hazmat package sent Priority Mail.
Hazmat support in Shopify Shipping. You need your own carrier account and the right declaration.
Sources: ship.com on 2026 USPS hazmat fees ยท Shopify Help Center. A wrong declaration can also get a carrier account suspended.
How it works
Three steps, inside your Shopify admin. No spreadsheets, no reading regulations.
- 01
Flag your catalog
HazFlag scans your products and flags the ones that are likely hazmat from their type, title and tags, so you know where to look first.
- 02
Read the safety data sheet
Upload the SDS from your supplier. HazFlag pulls the UN number, shipping name, class and packing group from Section 14.
- 03
Save it to every product
Results become product tags and fields, plus a CSV for ShipStation and other label tools. A dashboard shows what's left.
Built for "accidental hazmat" sellers
You didn't set out to ship dangerous goods. But perfume, polish, sprays and anything with a battery count. HazFlag is for small teams without a compliance department.
- Perfume and cologne
- Nail polish and remover
- Hairspray and dry shampoo
- Hand sanitizer
- Devices with lithium batteries
- Spray paint and craft supplies
Questions
Does it print hazmat labels?
No. It tells you what to declare. You print labels in the tool you already use, like ShipStation or Shippo, with the right answer in hand.
Is this certified compliance?
No. It's decision support. Every result shows where it came from, and you confirm it before it's saved. You stay responsible for your shipments.
What does it cost?
Early access is free. Waitlist stores also get a free manual catalog review while the app is being built.
Get early access
Join the waitlist. The first stores get the app free and a hands-on review of their catalog.