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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2-3-16 Corrosive to Metals<br />
(1)Definitions<br />
Definitions of corrosive to metals in UN <strong>GHS</strong> are as follows, and <strong>the</strong>y are adopted in this<br />
guidance.<br />
【<strong>GHS</strong> 2 nd revised edition】(2.16.1)<br />
A substance or a mixture which is corrosive to metals is a substance or a mixture which by<br />
chemical action will materially damage, or even destroy, metals.<br />
(2)<strong>Classification</strong> criteria in <strong>GHS</strong><br />
【<strong>GHS</strong> 2 nd revised edition】(2.16.2)<br />
A substance or a mixture which is corrosive to metals is classified in a single category <strong>for</strong> this<br />
class, using <strong>the</strong> test in Part III, sub-section 37.4 of <strong>the</strong> UN Recommendations on <strong>the</strong> Transport of<br />
Dangerous Goods, Manual of tests and Criteria, according to <strong>the</strong> following table:<br />
Table 2.16.2: Criteria <strong>for</strong> substances and mixtures corrosive to metal<br />
Category Criteria<br />
1 Corrosion rate on ei<strong>the</strong>r steel or aluminium surfaces exceeding 6.25 mm per year<br />
at a test temperature of 55°C when tested on both materials.<br />
NOTE: Where an initial test on ei<strong>the</strong>r steel or aluminium indicates <strong>the</strong> substance or mixture being<br />
tested is corrosive <strong>the</strong> follow-up test on <strong>the</strong> o<strong>the</strong>r metal is not required.<br />
(3) <strong>Guidance</strong> <strong>for</strong> <strong>Classification</strong><br />
A) Judgment of Not Classified<br />
Regarding “Corrosive to Metals”, if it is confirmed based on prescribed review documents<br />
that both steel and aluminum can be used as a container <strong>for</strong> <strong>the</strong> substance, fill in<br />
“<strong>Classification</strong> result” with “Not classified”, and fill in “<strong>Classification</strong> Grounds” with “Steel<br />
and aluminum can be used as a container”.<br />
B) Judgment <strong>for</strong> those substances that can not be classified<br />
1) In case <strong>the</strong> test method is not established<br />
The test method <strong>for</strong> “Corrosive to Metals” defined in TDG classification and adopted in<br />
<strong>GHS</strong> classification can not be applied to gases. It can not be applied to liquids with a boiling<br />
point of 55°C or lower, ei<strong>the</strong>r. In case of solid, it can be applied to those with a melting point<br />
of 55°C or lower. Hence, indicate as follows. In case of gases, fill in “<strong>Classification</strong> result”<br />
with “<strong>Classification</strong> not possible” regarding “corrosive to metals“, and fill in “<strong>Classification</strong><br />
Grounds” with “No established test method suitable <strong>for</strong> Gas substances”. In <strong>the</strong> case of<br />
liquids with a boiling point of 55°C or lower, fill in “<strong>Classification</strong> result” with<br />
“<strong>Classification</strong> not possible“ regarding “Corrosive to Metals“, and fill in “<strong>Classification</strong><br />
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