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(f) A package containing a material which is likely to decompose with a self-accelerated decomposition temperature (SADT) of 50 °C (122 °F) or less, or polymerize at a temperature of 54 °C (130 °F) or less with an evolution of a dangerous quantity of heat or gas when decomposing or polymerizing, unless the material is stabilized or inhibited in a manner to preclude such evolution. The SADT may be determined by any of the test methods described in Part II of the UN Manual of Tests and Criteria (IBR, see §171.7 of this subchapter).
(1) A package meeting the criteria of paragraph (f) of this section may be required to be shipped under controlled temperature conditions. The control temperature and emergency temperature for a package shall be as specified in the table in this paragraph based upon the SADT of the material. The control temperature is the temperature above which a package of the material may not be offered for transportation or transported. The emergency temperature is the temperature at which, due to imminent danger, emergency measures must be initiated.
Table 1 to Paragraph (f)(1)—Method of Determining Control and Emergency Temperature
| SADT1 | Control temperatures | Emergency temperature |
|---|---|---|
| SADT ≤20 °C (68 °F) | 20 °C (36 °F) below SADT | 10 °C (18 °F) below SADT. |
| 20 °C (68 °F) <SADT ≤35 °C (95 °F) | 15 °C (27 °F) below SADT | 10 °C (18 °F) below SADT. |
| 35 °C (95 °F) <SADT ≤50 °C (122 °F) | 10 °C (18 °F) below SADT | 5 °C (9 °F) below SADT. |
| 50 °C (122 °F) <SADT | (2) | (2) |
1Self-accelerating decomposition temperature.
2Temperature control not required.
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