Plastic molding compound in dough, sheet or extruded rope form evolving flammable vapor
HMT 15 June 2026Plastic molding compound in dough, sheet or extruded rope form evolving flammable vapor
Plastics are a wide range of synthetic or semisynthetic materials composed primarily of polymers. Their defining characteristic, plasticity, allows them to be molded, extruded, or pressed into a diverse range of solid forms. This adaptability, combined with a wide range of other properties such as low weight, durability, flexibility, chemical resistance, low toxicity, and low-cost production, has led to their widespread use around the world. While most plastics are produced from natural gas and petroleum, a growing minority are produced from renewable resources like polylactic acid Wikipedia
| Emergency Response Guide No. 171 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard Class9Miscellaneous hazardous materials |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
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| 32 | |
|---|---|
| IB8 | |
| IP3 | |
| IP7 |
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 155 | see 49 CFR §173.155 |
|---|---|---|
| (8B) Non-bulk | 221 | see 49 CFR §173.221 |
| (8C) Bulk | 221 | see 49 CFR §173.221 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | 100 kg |
|---|---|
| (9B) Cargo aircraft only | 200 kg |
(10) Vessel stowage 
| (10A) Location | |
|---|---|
| (10B) Other |
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