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  5. Dangerous Goods Transportation Related Tests (UN Recommendation Test) / GHS Classification Physical Hazard Evaluation Tests

Dangerous Goods Transportation Related Tests (UN Recommendation Test) / GHS Classification Physical Hazard Evaluation Tests

Tests will be performed to classify dangerous goods according to the United Nations Recommendations on the Transport of Dangerous Goods (Orange Book) as the U.N. safety guidelines for international transportation. The results of these tests are also applicable to the classification of physicochemical hazards based on the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Consultation services, meanwhile, are available for other tests regarding GHS classification.

Test Items

  • Flash point, Initial boiling point
  • Burning rate test
  • Spontaneous combustion test
  • Self-heating test
  • Water reactivity test
  • Burning test

Flash point, Initial boiling point

This test is designed to determine the applicability of Class 3 Flammable liquids along with the packing group. The flash point is measured according to the closed cup flash point tester.

Burning rate test

This test is designed to determine the applicability of Class 4.1 Flammable solids along with the packing group. It consists of a preliminary screening test on deposited samples with a rectangular cross-section and a main test on those with a triangular cross-section.

Spontaneous combustion test

This test is designed to determine the applicability of Class 4.2 Substances liable to spontaneous combustion (liquids or solids) along with the packing group. A liquid sample is dropped onto a filter paper in a porcelain cup to see if it ignites or burns within five minutes. Likewise, a solid sample is dropped onto an non-combustible surface from a height of 1 m to see if it ignites or burns within five minutes.

Self-heating test

This test is designed to determine the applicability of Class 4.2 Self-heating substances along with the packing group. A solid sample is put into a wire mesh cube and then heated in an air circulating oven to see if spontaneous ignition occurs or if the temperature of the sample exceeds the oven temperature by 60 degC within 24 hours. Two wire mesh cubes (25 mm or 100 mm) are used to test at temperature of 140 degC, 120 degC, or 100 degC to determine the self-heating temperature.

Water reactivity test

This test is designed to determine the applicability of Class 4.3 Substances which in contact with water emit flammable gases (liquids or solids) along with the packing group. A sample is dropped into water or onto a filter paper which is floated on the surface of distilled water at 20 degC to see it ignites. At the same time, the amount of flammable gases evolved on contact with water is measured.

Burning test

This test is designed to determine the applicability of Class 5.1 Oxidizing substances along with the packing group. Tests are conducted on the substance to be evaluated mixed with dry fibrous cellulose in mixing ratios of 1:1 and 4:1, by mass, of sample to cellulose. The burning time of the mixtures are compared with the standard 3:7, 3:2, and 2:3 mixture, by mass, of potassium bromate to cellulose for determining oxidizing properties.

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