联合国危险货物运输专家委员会（TDG）第41次会议提案49

Committee of Experts on the Transport of Dangerous Goods and on the Globally Harmonized System of Classification and Labelling of Chemicals

Amendments to the classification flow chart/decision logic for self-reactive substances and organic peroxides

Transmitted by the International Council of Chemical Associations (ICCA)

Introduction

1. During the last meetings of the Sub-Committee of Experts on the transport of Dangerous Goods (TDG Sub-Committee) and the Sub-Committee of Experts on the Globally Harmonized System of Classification and Labelling of Chemicals (GHS Sub-Committee), a proposal for amendment to the classification flow chart for organic peroxides and self-reactive substances was discussed (ST/SG/AC.10/C.3/2011/29–ST/SG/AC.10/C.4/2011/5).

2.  In the proposal, two alternatives were proposed:

(a)  a change of the classification in such a way that all existing classification elements in the Model Regulations and in the GHS were incorporated in the proposed flow chart and

(b)  in addition to (a), the classification of liquid organic peroxides/self-reactive substances Type G, as Type F as soon as they are transported or handled in Intermediate Bulk Containers (IBC) or tanks.

3. There was a long discussion on the last alternative proposal. The classification of solids in larger quantities (IBCs and tanks) was discussed as well as a number of other complicated issues that are already under discussion for many years in expert groups like the Working Group on Energetic and Oxidizing Substances (EOS) of the International Group of Experts on the Explosion Risks of Unstable Substances (IGUS).

4. It was never the aim of ICCA to resolve all these issues in the proposal. Therefore ICCA withdrew the complicated proposal (i.e. the one that included changes in classification principles) and promised to come back with a new proposal that would address only the aspects of classification elements that already exist in the current version of the Model Regulations and the GHS.

I. Backgrounds to the proposal

5. It was observed that various issues that determine the classification of substances or mixtures are addressed in the text of the Model Regulations and the GHS, but are not incorporated in the flow chart. These aspects can easily be overlooked by users not so familiar with the detailed text. As they are part of the classification procedure, it is more appropriate to include them in the classification flow charts for both self-reactive substances and organic peroxides. These flow charts are identical.

6. It was agreed during the last IGUS-EOS meeting that ICCA would prepare a proposal to both subcommittees (TDG and GHS).

7. The following aspects are addressed in the text of the Model Regulations and the GHS but are not incorporated in the classification flow charts:

(a)  no type G classification possible if the Self-accelerating decomposition temperature (SADT) of  the substance is < 60 ºC in a 50 kg packaging  (see Model regulations paragraphs 2.4.2.3.3.2 (g) and 2.5.3.3.2 (g) and GHS paragraphs 2.8.2.2 (g) and 2.15.2.2 (g))

(b)  no type G classification possible when a diluent is used with a boiling point < 150 ºC (see Model regulations paragraphs 2.4.2.3.3.2 (g) and 2.5.3.3.2 (g) and GHS paragraphs 2.8.2.2 (g) and 2.15.2.2 (g))

8. In the proposed amended flow chart these two aspects are addressed in the new boxes 14 and 15 respectively. The introduction of these boxes will not lead to a change in the existing classification principles.

II. Proposals

9. Based on the background given in section II of this document (no change in classification principles) the following is proposed (changes are shown in grey shading):

 (a)  In the Chapters 2.4 and 2.5 of the Model Regulations replace Figures 2.4.1 and 2.5.1 by the following:

Figure 2.4.1: FLOW CHART SCHEME FOR SELF-REACTIVE SUBSTANCES

Figure 2.5.1: FLOW CHART SCHEME FOR ORGANIC PEROXIDES
Figure 2.4.1: FLOW CHART SCHEME FOR SELF-REACTIVE SUBSTANCES (cont'd)*

Figure 2.5.1: FLOW CHART SCHEME FOR ORGANIC PEROXIDES (cont'd)
 (b) In Chapters 2.8 and 2.15 of the GHS replace decision logics 2.8 and 2.15 by the following:

Decision logic 2.8 for self-reactive substances and mixtures

Decision logic 2.15 for organic peroxides

Decision logic 2.8 for self-reactive substances and mixtures (cont'd)

Decision logic 2.15 for organic peroxides (cont'd)

(Note: the grey shaded wording in boxes10and 13 are just corrections.)

III. Consequential amendments

9. When proposal is adopted, the following flow charts have to be amended accordingly:

•    In the Manual of Tests and Criteria the flow chart given in Figure 20.1 (b)

联合国危险货物运输专家和全球化学品统一分类和标签制度专家委员会

对自反应物质和有机过氧化物分类流程图/判定逻辑的修订

由化学协会国际理事会(ICCA)提交

介绍

1.  在上次的危险货物运输专家分委员会（TDG分委会）和全球化学品统一分类和标签制度专家分委员会（GHS分委会）会议上，讨论了一个对有机过氧化物和自反应物质分类流程图进行修订的提案(ST/SG/AC.10/C.3/2011/29–ST/SG/AC.10/C.4/2011/5)。

2.  在提案中，提议了两种修订方法：

 (a)  分类变化体现在：将现有的分类要素都放入规章范本和GHS中提议的流程图中，以及

 (b)  除了上述(a)，G型液体有机过氧化物/自反应物质如果在中型散货箱(IBCs)或罐体中运输时，应被定为F型有机过氧化物/自反应物质。

3.  对于后面一个替代方案有很长的讨论。讨论了大量运输（以中型散货箱(IBCs)或罐体）固体货物的分类以及其他一些复杂问题，这些问题在专家组（例如，不稳定物质爆炸风险国际专家组（IGUS）中的含能物质和氧化性物质工作组(EOS)））中已经讨论了很多年。

4.  在这个提案中解决所有这些问题不是化学协会国际理事会(ICCA)的目标。因此，化学协会国际理事会(ICCA)撤销复杂的提议（也就是那个包括改变分类原则的提议）同时同意提出一个新的提案，只涉及那些在现行的规章范本和GHS版本中已经存在的分类要素。

I. 提案的背景

5.  我们注意到在规章范本和GHS的文本中提及了多个与确定物质或混合物的分类有关的要素，但这些要素并没有包括在流程图中。这些方面很容易被不是很熟悉具体文本的读者忽略掉。由于这些要素也是分类程序中的一部分，把这些内容包括在自反应物质和有机过氧化物分类流程图中更合适。自反应物质和有机过氧化物的分类流程图是相同的。

6. 在IGUS-EOS会议上赞同由ICCA准备向TDG和GHS分委会递交的提案。

7. 在规章范本和GHS文本中提及但在分类流程图中未包括的一些方面，其内容如下：

(a)  如果物质在50 kg包装件中的自加速分解温度(SADT) < 60℃，不能分类为G型（参见规章范本中的2.4.2.3.3.2 (g) , 2.5.3.3.2 (g) 以及 GHS 中的2.8.2.2 (g), 2.15.2.2 (g)）；

(b)   如果所用（减敏）稀释剂的沸点<150℃不能分类为G型（参见规章范本中的2.4.2.3.3.2 (g) , 2.5.3.3.2 (g) 以及 GHS中的 2.8.2.2 (g), 2.15.2.2 (g)）

8. 在提议修改的流程图中，上述两个方面分别在新的框14和15中进行了表述。引入这几个框不会导致现有分类原则的变化。

II. 提议

9.  基于本文件中II部分的背景（不改变分类原则），提议做如下修改（变化内容用灰色阴影表示）：

(a) 用下面的图代替规章范本2.4和2.5章节中2.4.1和 2.5.1中的图

图 2.4.1: 自反应物质分类流程图
图 2.5.1: 有机过氧化物分类流程图

图 2.4.1: 自反应物质分类流程图（续）

图 2.5.1: 有机过氧化物分类流程图（续）

 (b) 用下面新的判定逻辑代替在GHS2.8和2.15章节中的图2.8 和 2.15：

自反应物质和混合物的判定逻辑图 2.8

有机过氧化物的判定逻辑图2.15

自反应物质和混合物的判定逻辑图 2.8 (续)
有机过氧化物的判定逻辑图2.15 (续)

(注: 框10和13中的灰色阴影字体仅是更正)

III. 相应的修订

10. 如果提议被采纳，下面的流程图要相应做修订：

试验和标准手册中20.1 (b)的流程图