Articles
Practical guides on dangerous goods marks, GHS labels, UDI and barcode printing — written to be used alongside the free tools.
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Lithium battery shipping marks
Which UN number applies, what the mark must look like, and what changed in 2026.
GHS chemical labels
How CLP, HazCom 2024 and GB 15258 differ, and the minimum label size by container.
Tools: GHS label generator · GHS checklist · SDS → GHS
UDI and barcodes
Issuing agencies, GTIN/HIBC/ISBT formats and print-ready barcodes.
Tools: UDI generator · Barcode generator · Batch barcodes
UN3480, UN3481, UN3090, UN3091: Which UN Number Applies to Your Lithium Battery Shipment
Ion vs metal, alone vs with equipment — the two questions that decide the UN number, plus which mark or label each case needs.
Lithium Battery Mark Size and Design: 100×100 mm, 100×70 mm, Colours and Placement
Minimum 100 × 100 mm, reduced 100 × 70 mm, red hatching width, the phone number transition, and placement rules — plus how to print it so it survives transit.
Lithium Battery Shipping in 2026: 30% State of Charge for UN3481, Phone Number Removal and What Section II Still Covers
From 1 Jan 2026 lithium ion packed with equipment (UN3481, >2.7 Wh) must ship at ≤30% SoC; the phone number's last year on the mark; where Section II still applies.
GHS Label Requirements Compared: EU CLP, US HazCom 2024 and China GB 15258
Same pictograms, different rules: what each jurisdiction adds to the six GHS elements, language and emergency-phone requirements, and the HazCom 2024 deadlines.
GHS Label Minimum Size by Container Volume: EU CLP Table and China GB 15258 Table
Both official size tables side by side, the pictogram one-fifteenth and 1 cm² rules, what to do below 125 mL / 100 mL, and how to choose label stock for drums and bottles.
UDI Issuing Agencies Compared: GS1, HIBCC, ICCBBA and IFA — Which One to Use and Why
GS1, HIBCC, ICCBBA and IFA side by side: who accepts them, how the DI and PI are built, which barcodes to print, and how to choose for your device category.