如果混合物含有四种以上有助于混合物分类的物质，则应在标签上标明哪些物质？

如果混合物含有四种以上有助于混合物分类的物质，则应在标签上标明哪些物质？

If a mixture contains more than four substances contributing to the classification of the mixture, which substances should be identified on the label?

CLP 第 18(3) 条规定，混合物中所有有助于将混合物归类为特定危险类别的物质的身份都必须在标签上注明。最多可列出四个化学名称，除非需要更多名称来反映危害的性质和严重程度。对于如何决定哪些物质应优先在标签上命名，并没有严格的规定，但以下内容可能有助于选择。对于非添加剂健康危害（例如生殖细胞致突变性、致癌性、生殖毒性、呼吸道或皮肤致敏性以及特定目标器官毒性类别 1 和 2），混合物中含量超过一般或特定浓度限值的所有成分都应被视为 CLP 第 18(3)(b) 条所指的“主要造成重大健康危害的成分”，并应包含在标签上。对于 CLP 第 18(3)(b) 条中提到的添加剂健康危害（例如急性毒性、皮肤腐蚀、严重眼损伤、特定目标器官毒性第 3 类和吸入危害），混合物中含量超过一般或特定浓度限值的所有成分都应在标签上列出。但是，如果有几种成分对一个危害终点的分类有贡献，则只需在标签上列出对分类有主要贡献的成分，例如最接近 GCL 或 SCL 的成分，因此不需要列出对分类贡献有限的其他成分的名称。此外，含有皮肤和呼吸道致敏物的混合物适用特定的标签规则。见附件一表 3.4.6 和附件二第 2.8 点。

Article 18(3) of CLP provides that the identity of all substances in a mixture that contribute to the classification of the mixture in certain hazard classes must be given on the label. A maximum of four chemical names are to be included, unless more are needed to reflect the nature and severity of the hazards. There are no strict rules on how to decide which substances should take precedence to be named on the label, but the following may help in the selection. For non-additive health hazards (e.g. germ cell mutagenicity, carcinogenicity, reproductive toxicity, respiratory or skin sensitisation and specific target organ toxicity categories 1 and 2), all ingredients which are present in the mixture above the generic or specific concentration limit should be considered as "primarily responsible for the major health hazards" within the meaning of Article 18(3)(b) CLP and included on the label. For the additive health hazards mentioned in Article 18 (3)(b) CLP (e.g. acute toxicity, skin corrosion, serious eye damage, specific target organ toxicity category 3 and aspiration hazard), all ingredients which are present in the mixture above the generic or specific concentration limits should be included on the label. However, where there are several ingredients contributing to classification for one hazard endpoint, only the ingredients primarily contributing to the classification, for example, those closest to the GCL or SCL, need to be included on the label, and thus the names of other ingredients with limited contribution to the classification are not required. In addition, specific labelling rules apply to mixtures containing skin and respiratory sensitisers. See Annex I Table 3.4.6 and Annex II, point 2.8.