Characteristics
| Physical properties
|
| Size
|
Angle of
repose
|
Bulk density
(kg/m3)
|
Stowage factor
(m3/t)
|
| Not applicable
|
Not applicable
|
-
|
-
|
| Hazard classification
|
| Class
|
Subsidiary
hazard(s)
|
MHB
|
Group
|
| 4.3
|
Not applicable
|
|
B
|
Hazard
In contact with water may evolve hydrogen, a flammable gas which may form
explosive mixtures with air. Impurities may, under similar circumstances, produce
phosphine and arsine, which are highly toxic gases. May also evolve silanes, which are
toxic and may ignite spontaneously.
This cargo is non-combustible or has a low fire risk.
Stowage and segregation
"Separated from" foodstuffs and all class 8 liquids.
Hold cleanliness
Clean and dry as relevant to the hazards of the cargo.
Weather precautions
This cargo shall be kept as dry as practicable before loading, during
loading and during voyage. This cargo shall not be loaded during precipitation. During
loading of this cargo, all non-working hatches of the cargo spaces to which this cargo
is loaded, or to be loaded, shall be closed.
Loading
Trim in accordance with the relevant provisions required under sections 4
and 5 of this Code.
Precautions
Prior to loading this cargo, a certificate shall be provided by the
manufacturer or shipper stating that the material was stored under cover, but exposed to
the weather in the particle size to be shipped, for not less than 3 days prior to
shipment. The bulkheads between the cargo spaces and the engine-room shall be gastight
and shall be inspected and approved by the Administration. During handling of this
cargo, "NO SMOKING" signs shall be posted on decks and in areas adjacent to cargo spaces
and no naked lights shall be permitted in these areas. This cargo shall be loaded in
cargo spaces fitted with mechanical ventilation having at least two separate fans. The
total ventilation shall be at least six air changes per hour, based on the empty space.
At least two sets of self-contained breathing apparatus, in addition to those required
by SOLAS regulation II-2/10.10, shall be provided on board.
Ventilation
Continuous mechanical ventilation shall be conducted during the voyage for
the cargo spaces carrying this cargo. If maintaining ventilation endangers the ship or
the cargo, it may be interrupted unless there is a risk of explosion or other danger due
to interruption of the ventilation. In any case mechanical ventilation shall be
maintained for a reasonable period prior to discharge. Ventilation shall be arranged
such that any escaping gases are minimized from reaching living quarters on or under the
deck.
Carriage
For quantitative measurements of hydrogen, phosphine, arsine, suitable
detectors for each gas or combination of gases shall be on board while this cargo is
carried. The detectors shall be of certified safe type for use in explosive atmosphere.
The concentrations of these gases in the cargo spaces carrying this cargo shall be
measured regularly, during the voyage, and the results of the measurements shall be
recorded and kept on board.
Discharge
No special requirements.
Clean-up
After discharge of this cargo, the cargo spaces shall be swept clean twice.
Water shall not be used for cleaning of the cargo space which has contained
this cargo, because of danger of gas.
Emergency procedures
| Special emergency equipment to
be carried
|
| Self-contained breathing
apparatus.
|
| Emergency
procedures
|
| Wear self-contained breathing
apparatus.
|
| Emergency action in the event
of fire
|
| Batten down and use
CO2, if available. Do not use water.
|
| Medical first aid
|
| Refer to the Medical First Aid
Guide (MFAG), as amended.
|