GHS Classification Guidance for the Japanese Government
GHS Classification Guidance for the Japanese Government
GHS Classification Guidance for the Japanese Government
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2-3-8 Self-reactive Substances and Mixtures<br />
(1)Definitions<br />
Definitions of self-reactive substances and mixtureses in UN <strong>GHS</strong> are as follows, and <strong>the</strong>y are<br />
adopted in this guidance.<br />
【<strong>GHS</strong> 2 nd revised edition】(2.8.1)<br />
2.8.1.1 Self-reactive substances or mixtures are <strong>the</strong>rmally unstable liquid or solid substances or<br />
mixtures liable to undergo a strongly exo<strong>the</strong>rmic decomposition even without participation of<br />
oxygen (air). This definition excludes substances and mixtures classified under <strong>the</strong> <strong>GHS</strong> as<br />
explosives, organic peroxides or as oxidizing.<br />
2.8.1.2 A self-reactive substance or mixture is regarded as possessing explosive properties w hen<br />
in laboratory testing <strong>the</strong> <strong>for</strong>mulation is liable to detonate, to deflagrate rapidly or to show a violent<br />
effect when heated under confinement.<br />
(2)<strong>Classification</strong> criteria in <strong>GHS</strong><br />
【<strong>GHS</strong> 2 nd revised edition】(2.8.2)<br />
2.8.2.1 Any self-reactive substance or mixture should be considered <strong>for</strong> classification in this<br />
class unless:<br />
(a) They are explosives, according to <strong>the</strong> <strong>GHS</strong> criteria of Chapter 2.1;<br />
(b) They are oxidizing liquids or solids, according to <strong>the</strong> criteria of Chapters 2.13 or<br />
2.14,except that mixtures of oxidizing substances w hich contain 5% or more of<br />
combustible organic substances shall be classified as self-reactive substances<br />
according to <strong>the</strong> procedure defined in <strong>the</strong> note below;<br />
(c) They are organic peroxides, according to <strong>the</strong> <strong>GHS</strong> criteria of Chapter 2.15;<br />
(d) Their heat of decomposition is less than 300 J/g; or<br />
(e) Their self-accelerating decomposition temperature (SADT) is greater than 75°C <strong>for</strong> a<br />
50 kg package.<br />
NOTE: Mixtures of oxidizing substances, meeting <strong>the</strong> criteria <strong>for</strong> classification as oxidizing<br />
substances, which contain 5.0% or more of combustible organic substances and which do not<br />
meet <strong>the</strong> criteria mentioned in (a), (c), (d) or (e) above, shall be subjected to <strong>the</strong> self-reactive<br />
substances classification procedure;<br />
Such a mixture showing <strong>the</strong> properties of a self-reactive substance type B to F (see 2.8.2.2)<br />
shall be classified as a self-reactive substance.<br />
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