from Code of Federal Regulations/ Transportation
Part 173-SHIPPERS-GENERAL REQUIREMENTS
Appendix B to Part 173-PROCEDURE FOR TESTING CHEMICAL
COMPATIBILITY AND RATE OF PERMEATION IN PLASTIC PACKAGING AND RECEPTACLES.
1. The purpose of this procedure is to determine the chemical compatibility
and permeability of liquid hazardous materials packaged in plastic
packaging and receptacles. Alternatives for this procedure are permitted
as specified in §173.24(e)(3)(iii) of this subchapter.
2. Compatibility and rate of permeation are determined by subjecting
full size plastic containers (or smaller containers as permitted
in paragraph 4 of this Appendix) and hazardous material lading to
one of the following combinations of time and temperature:
A.Test Method 1: 180 days at a temperature no lower than 18ºC.
B.Test Method 2: 28 days at a temperature no lower than 50ºC. (122ºF.)
C. Test Method 3: 14 days at a temperature no lower than 60ºC. (140ºF.)
3. Regardless of which test method is used, at least
three sample containers shall be tested for each
combination of hazardous material and size and
design of container. Fill containers to rated capacity
with the specific hazardous material (at the concentration
to be transported) and close as for shipment. For
the first and last 24 hours of storage under the
selected test method, place the containers with
closures downward, except that container fitted
with a vent are so placed on each occasion for
five minutes only.
4. For testing under Test Method 2 or 3 in those instances
where it is not practicable to use full size containers,
smaller containers may be used. The small container
shall be manufactured by the same process as the
larger container (for example, using the same method
of molding and processing temperatures) and be
made of identical resins, pigments, and additives.
5. Determine filled container weight or net weight
of contents both before and after storage under
the selected test method. Rate of permeation is
determined from loss of hazardous materials contents,
during the conduct of the test, expressed as a
percentage of the original weight.
6. After storage under the selected test method, the
container shall be drained, rinsed, filled to rated
capacity with water and, with filled container
at ambient temperature, dropped from a height determined
in accordance with §178.603(e) of this subchapter
onto a rigid non-resilient, flat and horizontal
7. Each of the following constitute test failure:
a. Visible evidence of permanent deformation due to vapor pressure build-up
or collapse of walls, deterioration, swelling, crazing, cracking, excessive
corrosion, oxidation, embrittlement, leakage, rupture or other defects
likely to cause premature failure or a hazardous condition.
b. For materials meeting the definition of a poison according to this
subchapter, a rate of permeation in excess of 0.5% determined over the
test period. For all other hazardous materials, a rate of permeation
in excess of 2.0% determined over the test period.
173.176, 49 FR24691, June 14, 1984, as amended
by Amdt. 173-224, 55 FR 52670 Dec. 21, 1990; 56
FR 66279, Dec. 20, 1991; Amdt. 173-234, 58 FR 51533,
Oct. 1, 1993]