A driver is transporting a shipment of UN1005, Anhydrous Ammonia, Class 2.2, with a subsidiary hazard of Class 8. The shipping papers correctly list both the primary and subsidiary hazards. What specific information, beyond the basic description, must be included on the shipping papers for this material?
- AThe words 'Subsidiary Hazard: Corrosive' and the packing group.
- BThe words 'Non-Flammable Gas' and the emergency contact number.
- CThe words 'Limited Quantity' and the ERG guide number.
- DThe words 'Poison Inhalation Hazard' and the reportable quantity.
Show answer & explanationAnswer & explanation
Correct answer: D. The words 'Poison Inhalation Hazard' and the reportable quantity.
UN1005, Anhydrous Ammonia, is a Class 2.2 material that is a 'Poison Inhalation Hazard' (PIH) and also has a subsidiary hazard of Class 8 (Corrosive). According to 49 CFR 172.203(m), if a material is a PIH, the words 'Poison Inhalation Hazard' or 'Inhalation Hazard' must be entered on the shipping paper immediately following the basic description. Additionally, if the quantity equals or exceeds the Reportable Quantity (RQ), the letters 'RQ' must be entered on the shipping paper. For UN1005, the RQ is 100 pounds.
Why the other options are wrong
- A. While it has a corrosive subsidiary hazard, the specific wording 'Subsidiary Hazard: Corrosive' is not a mandatory shipping paper entry in that format; the hazard class (Class 8) is part of the basic description. Packing Group is also part of the basic description or not applicable to gases.
- B. 'Non-Flammable Gas' is part of its proper shipping name or hazard class (Class 2.2), not an additional required entry. An emergency contact number is required, but not in place of PIH/RQ information.
- C. 'Limited Quantity' specifies an exemption, not a required entry for this material. The ERG guide number is helpful but not a mandatory shipping paper entry under 49 CFR 172.202 or 172.203.
PIH & RQ Shipping Paper Entries
For Poison Inhalation Hazard (PIH) materials, the words 'Poison Inhalation Hazard' or 'Inhalation Hazard' must appear on shipping papers. If the quantity meets or exceeds the Reportable Quantity (RQ), 'RQ' must also be indicated.
- Required by 49 CFR 172.203(m) and 172.203(c).
- PIH phrase follows basic description.
- RQ indicates a specific quantity threshold.
Memory trick: Beyond the basics, PIH and RQ, special words for dangers, clear for you.