|| 1. For the purpose of this subchapter "corrosive materials" (Class 8)
means a liquid or solid that causes full thickness destruction of human
skin at the site of contact within a specified period of time. A liquid
that has a severe corrosion rate on steel or aluminum is also a
2. If human experience or other data indicate that the hazard of a
material is greater or less than indicated by the results of the tests
specified in paragraph (a) of this section, RSPA may revise its
classification or make the determination that the material is not
subject to the requirements of this subchapter.
3. Skin corrosion test data produced no later than September 30, 1995,
using the procedures of 49CFR 173, Appendix A, in effect on September
30, 1995 (see 49CFR Part 173, Appendix A, revised as of October 1,
1994) for appropriate exposure times may be used for classification and
assignment of packing group for Class 8 materials corrosive to skin.
454 kg (1001 lbs) or more gross weight of a corrosive material.
Although the corrosive class includes both acids and bases, the
hazardous materials load and segregation chart does not make any
reference to the separation of various incompatible corrosive materials
from each other. In spite of this, however, when shipping corrosives
care should be taken to ensure that incompatible corrosive materials
can not become mixed as many corrosives react very violently if mixed.
If responding to a transportation incident involving corrosive
materials (especially a mixture of corrosives), caution should be