HazMat Tool — substance information

Engine, internal combustion or Machinery, internal combustion

HMT May 2026
UN / ID
UN 3530
Hazard class
9
Packing group
ERG guide
ERG 171
Special provisions
SP 135, SP A200
Source
49 CFR §172 (2026/05)

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Engine, internal combustion or Machinery, internal combustion


An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power generation), heat energy (e.g. geothermal), chemical energy, electric potential and nuclear energy (from nuclear fission or nuclear fusion). Many of these processes generate heat as an intermediate energy form; thus heat engines have special importance. Wikipedia

Emergency Response Guide No. 171

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

9
Miscellaneous hazardous materials

(4) Identification number Help

UN 3530

(5) Packing Group Help

n/a

(6) Labels Help

Miscellaneous hazardous materials (9)

(7) Special Provisions (§172.102) Help

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.
135
A200

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions220see 49 CFR §173.220
(8B) Non-bulk220see 49 CFR §173.220
(8C) Bulk220see 49 CFR §173.220

(9) Quantity Limits Help

(9A) Passenger aircraft/railNo limit
(9B) Cargo aircraft onlyNo limit

(10) Vessel stowage Help

(10A) Location
(10B) Other n/a

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

No compatibility information for class 9 in 49 CFR §177.848 included.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

  • §177.834 - General requirements
  • §177.835 - Class 1 materials
  • §177.837 - Class 3 materials
  • §177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
  • §177.839 - Class 8 (corrosive) materials
  • §177.840 - Class 2 (gases) materials
  • §177.841 - Division 6.1 and Division 2.3 materials
  • §177.842 - Class 7 (radioactive) material
  • §177.843 - Contamination of vehicles