Methacrylaldehyde, stabilized

Temperature should be maintained between 18 °C (64.4 °F) and 40 °C (104 °F). Tanks containing solidified methacrylic acid must not be reheated during transport.

Browse special provision 45

When materials are stabilized by temperature control, the provisions of § 173.21(f) of this subchapter apply. When chemical stabilization is employed, the person offering the material for transport shall ensure that the level of stabilization is sufficient to prevent the material as packaged from dangerous polymerization at 50 °C (122 °F). If chemical stabilization becomes ineffective at lower temperatures within the anticipated duration of transport, temperature control is required in which case transportation is forbidden by aircraft. In making this determination factors to be taken into consideration include, but are not limited to, the capacity and geometry of the packaging and the effect of any insulation present; the temperature of the material when offered for transport; the duration of the journey and the ambient temperature conditions typically encountered in the journey (considering also the season of year); the effectiveness and other properties of the stabilizer employed; applicable operational controls imposed by regulation (<i>e.g.,</i> requirements to protect from sources of heat, including other cargo carried at a temperature above ambient); and any other relevant factors.

Browse special provision 387

_{Authorized IBCs:} Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1).<br>_{Additional Requirement:} Only liquids with a vapor pressure less than or equal to 110 kPa at 50 °C (1.1 bar at 122 °F), or 130 kPa at 55 °C (1.3 bar at 131 °F) are authorized.

Browse special provision IB2

<table class="table table-bordered table-condensed ushmr-sp-table"><tr><th>Minimum test pressure (bar)</th><td>4</td></tr><tr><th>Minimum shell thickness</th><td>§ 178.274(d)(2)</td></tr><tr><th>Pressure-relief requirements</th><td>Normal</td></tr><tr><th>Bottom opening requirements</th><td>§ 178.275(d)(3)</td></tr></table>

Browse special provision T7

The maximum degree of filling must not exceed the degree of filling determined by the following:<br><br>Where: <br>t_r is the maximum mean bulk temperature during transport, and t_f is the temperature in degrees celsius of the liquid during filling.

Browse special provision TP1

Self-contained breathing apparatus must be provided when this hazardous material is transported by sea.

Browse special provision TP13

D

Stowage category “D” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers or one passenger per each 3 m of overall vessel length, but the material is prohibited on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)