AMMONIUM NITRATE UN 1942
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AMMONIUM NITRATE UN 1942

 with not more than 0.2% total combustible material, including any organic substance, calculated as carbon to the exclusion of any other added substance

Description

White crystals, prills or granules. Wholly or partly soluble in water.

Note: This schedule should only be used for substances that do not exhibit properties of class 1 when tested in accordance with Test Series 1 and 2 of class 1 (see UN Manual of Tests and Criteria).

Characteristics

Physical properties
Size Angle of repose Bulk density (kg/m3) Stowage factor (m3/t)
1 mm to 4 mm 27° to 42° 1,000 1.00
Hazard classification
Class Subsidiary hazard(s) MHB Group
5.1 Not applicable   B

Hazard

Oxidizer, supports combustion. A major fire aboard a ship carrying this cargo may involve a risk of explosion in the event of contamination (e.g. by fuel oil) or strong confinement. An adjacent detonation may also involve a risk of explosion. If heated strongly, this cargo decomposes, giving off toxic gases and gases which support combustion.

Ammonium nitrate dust might be irritating to skin and mucous membranes.

This cargo is hygroscopic and will cake if wet.

Stowage and segregation

"Separated from" sources of heat or ignition (see also Loading).

"Separated by a complete compartment or hold from" combustible materials (particularly liquids), chlorates, chlorides, chlorites, hypochlorites, nitrites, permanganates and fibrous materials (e.g. cotton, jute, sisal, etc.).

"Separated from" all other goods.

If the bulkhead between the cargo space and the engine-room is not insulated to class "A-60" standard, this cargo shall be stowed "away from" the bulkhead.

Hold cleanliness

Clean and dry as relevant to the hazards of the cargo.

Weather precautions

This cargo shall be kept as dry as practicable. This cargo shall not be handled during precipitation. During handling of this cargo, all non-working hatches of the cargo spaces into which this cargo is loaded, or to be loaded, shall be closed.

Loading

This cargo shall not be loaded in cargo spaces adjacent to fuel oil tank(s), unless heating arrangements for the tank(s) are disconnected and remain disconnected during the entire voyage.

Trim in accordance with the relevant provisions required under sections 4 and 5 of this Code.

Prior to loading, the following provisions shall be complied with:

  • .1 This cargo shall not be accepted for loading when the temperature of the cargo is above 40°C.

  • .2 Prior to loading, the shipper shall provide the master with a certificate signed by the shipper stating that all the relevant conditions of the cargo required by this Code, including this individual schedule, have been met.

  • .3 The fuel tanks situated under the cargo spaces to be used for the transport of this cargo shall be pressure tested to ensure that there is no leakage of manholes and piping systems leading to the tanks.

  • .4 All electrical equipment, other than those of approved intrinsically safe type, in the cargo spaces to be used for this cargo shall be electrically disconnected from the power source, by appropriate means other than a fuse, at a point external to the space. This situation shall be maintained while the cargo is on board.

  • .5 Due consideration shall be given to the possible need to open hatches in case of fire to provide maximum ventilation and to apply water in an emergency and the consequent risk to the stability of the ship through fluidization of the cargo.

During loading, the following provisions shall be complied with:

  • .6 Bunkering of fuel oil shall not be allowed. Pumping of fuel oil in spaces adjacent to the cargo spaces for this cargo, other than the engine-room, shall not be allowed.

  • .7 As far as reasonably practicable, combustible securing and protecting materials shall not be used. When wooden dunnage is necessary, only a minimum shall be used.

Precautions

This cargo shall only be accepted for loading when the competent authority is satisfied with regard to the resistance to detonation of this material based on the test.footnote Prior to loading, the shipper shall provide the master with a certificate stating that the resistance to detonation of this material is in compliance with this requirement. The master and officers are to note that the ship's fixed gas fire-extinguishing installation will be ineffective on the fire involving this cargo and that applying copious amounts of water may be necessary. Pressure on the fire mains shall be maintained for fire-fighting and fire hoses shall be laid out or be in position and ready for immediate use during loading and discharging of this cargo. No welding, burning, cutting or other operations involving the use of fire, open flame, spark- or arc-producing equipment shall be carried out in the vicinity of the cargo spaces containing this cargo except in an emergency. Precautions shall be taken to avoid the penetration of this cargo into other cargo spaces, bilges and other enclosed spaces. Smoking shall not be allowed on deck and in the cargo spaces and "NO SMOKING" signs shall be displayed on deck whenever this cargo is on board. The hatches of the cargo spaces, whenever this material is on board, shall be kept free to be capable of being opened in case of an emergency.

Appropriate precautions shall be taken to protect machinery and accommodation spaces from the dust of the cargo. Bilge wells of the cargo spaces shall be protected from ingress of the cargo. Due consideration shall be given to protect equipment from the dust of the cargo. Persons who may be exposed to the dust of the cargo shall wear goggles or other equivalent dust eye-protection and dust filter masks. Those persons shall wear protective clothing, as necessary.

Ventilation

The cargo spaces carrying this cargo shall not be ventilated during voyage.

Carriage

Hatches of the cargo spaces carrying this cargo shall be weathertight to prevent the ingress of water. The temperature of this cargo shall be monitored and recorded daily during the voyage to detect decomposition, which may result in heating and oxygen depletion.

Discharge

If this cargo has hardened, it shall be trimmed to avoid the formation of overhangs, as necessary. Bunkering of fuel oil shall not be allowed. Pumping of fuel oil in spaces adjacent to the cargo spaces for this cargo, other than the engine-room, shall not be allowed.

Clean-up

After discharge of this cargo, the bilge wells and the scuppers of the cargo spaces shall be checked and any blockage in the bilge wells and the scuppers shall be removed.

Emergency procedures

Special emergency equipment to be carried
Protective clothing (boots, gloves, coveralls and headgear).

Self-contained breathing apparatus.

Emergency procedures
Wear protective clothing and self-contained breathing apparatus.
Emergency action in the event of fire
Fire in a cargo space containing this material: Open hatches to provide maximum ventilation. Ship's fixed gas fire-extinguishing installation will be inadequate. Use copious amounts of water and isolate the source of heat, if any. Flooding of the cargo space may be considered but due consideration should be given to stability.

Fire in an adjacent cargo space: Open hatches to provide maximum ventilation. Heat transferred from fire in an adjacent space can cause the material to decompose with consequent evolution of toxic fumes. Dividing bulkheads should be cooled.

Medical first aid
Refer to the Medical First Aid Guide (MFAG), as amended.
Parent topic: Appendix 1 – Individual Schedules of Solid Bulk Cargoes
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