Found at 49 CFR 172.504(e) of the USDOT/PHMSA Hazardous Materials Regulations (HMR), the placarding tables (Table 1 and Table 2) identify a distinction made by USDOT/PHMSA between the “really nasty” hazardous materials of Table 1 and the “routine” HazMat of Table 2. A HazMat’s location on one of the two tables will play a significant role in determining which – if any – placards are required to be displayed on the vehicle transporting it. The Table 1 and Table 2 placarding tables are also referenced in the following regulations of the HMR:
- The applicability of the empty packaging (with residue) exception at §173.29(c).
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So, what are the Table 1 and Table 2 placarding tables of 49 CFR 172.504(e)?
Table 1:
| Category of material (Hazard class or division number and additional description, as appropriate) | Placard name | Placard design section reference (49 CFR) |
|---|---|---|
| 1.1 | EXPLOSIVES 1.1 | 172.522 |
| 1.2 | EXPLOSIVES 1.2 | 172.522 |
| 1.3 | EXPLOSIVES 1.3 | 172.522 |
| 2.3 | POISON GAS | 172.540 |
| 4.3 | DANGEROUS WHEN WET | 172.548 |
| 5.2 (Organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552 |
| 6.1 (material poisonous by inhalation (see 171.8 of this subchapter)) | POISON INHALATION HAZARD | 172.555 |
| 7 (Radioactive Yellow III label only) | RADIOACTIVE* | 172.556 |
| *RADIOACTIVE placards are also required for: All shipments of unpackaged LSA-I material or SCO-I; all shipments required by 173.427, 173.441, and 173.457 of this subchapter to be operated under exclusive use, and all closed vehicles used in accordance with 173.443(d). | ||
Table 2:
| Category of material (Hazard class or division number and additional description, as appropriate) | Placard name | Placard design section reference (49 CFR) |
|---|---|---|
| 1.4 | EXPLOSIVES 1.4 | 172.523 |
| 1.5 | EXPLOSIVES 1.5 | 172.524 |
| 1.6 | EXPLOSIVES 1.6 | 172.525 |
| 2.1 | FLAMMABLE GAS | 172.532 |
| 2.2 | NON-FLAMMABLE GAS | 172.528 |
| 3 | FLAMMABLE | 172.542 |
| Combustible liquid | COMBUSTIBLE | 172.544 |
| 4.1 | FLAMMABLE SOLID | 172.546 |
| 4.2 | SPONTANEOUSLY COMBUSTIBLE | 172.547 |
| 5.1 | OXIDIZER | 172.550 |
| 5.2 (Other than organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552 |
| 6.1 (other than material poisonous by inhalation) | POISON | 172.554 |
| 6.2 | (None) | |
| 8 | CORROSIVE | 172.558 |
| 9 | Class 9 (see 172.504(f)(9)) | 172.560 |
| ORM-D | (None) |