In early May, ICHCA International welcomed a key amendment to the International Maritime Dangerous Goods (IMDG) Code by the International Maritime Organization (IMO), which strengthens safety requirements for shipping ammonium nitrate.
Key provisions of the amendment
The revised clause 7.6.2.8.4 clarifies that under-deck carriage of ammonium nitrate and related fertilizers is permissible only if all hatches, including tween deck hatches, can be readily opened in an emergency. This ensures effective firefighting measures, such as maximum ventilation and boundary cooling, can be implemented promptly.
Ammonium nitrate fires can escalate out of control very rapidly. To help prevent consequential loss of life and damage, the new provisions laid out in the IMDG Code, in particular clause 7.6.2.8.4, should be complied with at all times
Ammonium Nitrate (NH₄NO₃), a white to grey odourless chemical has a melting point of 169 degrees C and decomposes at 210 degrees C. While it does not burn by itself, it will significantly accelerate burning of combustible material.
The revision aims to eliminate ambiguities regarding stowage requirements, particularly in multi-layered compartments of conventional reefer vessels, where compliance with emergency access provisions has been challenging.
Implications for stakeholders
- Voluntary early adoption: While the amendment becomes mandatory in 2026, the IMO encourages voluntary compliance from January 2025.
- Operational adjustments: Shipping companies may need to assess and modify vessel designs to ensure hatch accessibility aligns with the new requirements. This could involve retrofitting existing ships or adjusting cargo stowage practices.
- Regulatory alignment: Countries with significant ammonium nitrate handling, such as Australia, South Africa, and Chile, have already implemented specific regulations addressing these risks. The IMO’s amendment seeks to standardize safety measures across international maritime operations.
Although not mandatory until 1st January 2026 it can be applied on a voluntary basis from January 2025. ICHCA is urging all those involved in the maritime transport of ammonium nitrate to abide by the new regulation immediately
As explained, the amendment follows an ICHCA prepared white paper on the subject lodged with IMO in 2022, which recommended clarification of the relevant IMDG Clause.