Hazmat Load Segregation Checker

Hazard classes in the load

Add a hazard class or division

Result

Add at least two hazard classes above to check segregation.

XForbidden — may not be loaded/transported/stored together OSeparate — OK only if packages can't commingle if leakage occurs —No restriction under this table *Class 1 — governed by compatibility-group table

Compatibility heatmap — your load

Every pair of hazard classes you've added above, plotted as a co-load matrix. Green = clear, amber = separate required, red = forbidden — driven live by the same § 177.848 table used for the results above.

Add two or more hazard classes to render the compatibility heatmap.

Reference — full segregation table

The complete 49 CFR § 177.848(d) table, transcribed in full from the current eCFR text. Row/column meet = the code for that pair.

Class 1 (explosive) compatibility-group table — § 177.848(f)

When two or more Class 1 items with different compatibility groups are loaded together, this table governs instead of the class-level table above.

Reading the numbers: "1" = Group L explosives only travel with an identical explosive. "2" = any combination of C/D/E is treated as Group E. "3" = any combination of C/D/E with N is treated as Group D. "4" = see § 177.835(g) for detonators. "5" = Division 1.4S fireworks may not load with Division 1.1/1.2. "6" = Group G articles (excluding fireworks / special-handling items) may load with C/D/E articles if explosive substances aren't in the same vehicle.

Table notes (§ 177.848(e)): Blank = no restriction. "X" = may not be loaded, transported, or stored together in the same transport vehicle or storage facility. "O" = may not be together unless separated so that leakage under normal transport conditions could not commingle the materials. "*" = governed by the Class 1 compatibility table. "A" (note column) = notwithstanding "X," ammonium nitrate (UN1942) / ammonium nitrate fertilizer may load with Division 1.1 or 1.5, unless prohibited by § 177.835(c). Subsidiary hazard labels require the more restrictive segregation when applicable (§ 177.848(e)(6)).

Source: 49 CFR § 177.848 — Segregation of hazardous materials (segregation table, notes, and Class 1 compatibility table transcribed directly from the current eCFR text) · ecfr.gov/.../section-177.848

How this tool works

Hazmat Load Segregation Checker runs entirely in your browser. Inputs are evaluated with rules and constants taken from 49 CFR § 177.848 (Hazmat & dangerous goods). Nothing is uploaded to a server for the calculation itself.

Enter the values that match your load, vehicle, or scenario.
Results update live — treat them as a cited reference, not legal or professional advice.
Open the primary source linked at the top of this page before you rely on a number for compliance.

Use Copy link to share this page (including query parameters when the tool supports them) or Print for a dock/packet copy.

FAQ

Who is Hazmat Load Segregation Checker for?

Anyone who needs a fast, cited hazmat & dangerous goods reference — especially operators who would otherwise dig through a handbook or regulation PDF mid-task.

Do I need an account?

No. Sentinel Tools are free, public, and run in your browser with no sign-up.

How current is the source?

The tool is built from 49 CFR § 177.848. Regulations and agency tables can change — use the source link on this page to verify the latest official text.