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Employers shall conspicuously label the following items on containers containing hazardous chemicals in accordance with the classification and label elements prescribed in Attachment 1. and the format of Attachment 2. The text for the labels in Chinese shall be primary, and if necessary, supplement with foreign languages that workers understand:
1.Hazard pictograms
2.Contents:
（1）Name;
（2）Hazardous ingredients;
（3）Signal Words;
（4）Hazard statements;
（5）Precautionary statements;
（6）Name, address, and telephone number of manufacturer, importer or supplier.
If the contained hazardous chemicals prescribed in the preceding Paragraph are mixtures, their hazardous ingredients that should be labeled refer to all hazardous ingredients that contain hazardous properties of physical and health hazards that satisfy CNS15030 classification within the mixture.
If the volume of the container prescribed in Paragraph 1 is under 100ml, it may label only the names, hazard pictograms, and signal words.

For mixtures as prescribed in Paragraph 2 of the preceding Article, the employer shall label them based on the hazardous properties after mixing.
The hazardous properties of the preceding Paragraph are determined as follows:
1.If a mixture has been tested as a whole, the results shall be used;
2.If a mixture has not been tested as a whole, in addition to having scientific proofs to its health hazards, the physical hazards of its flammable, explosive, and reactive properties shall be assessed using scientifically valid data in accordance with the standards for classifying mixtures set by CNS 15030 Classification.

The shape of the labeled hazard pictograms prescribed in Article 5 is a 45 degrees vertical square, and must be sized so that it can be clearly recognized. The symbols should be in black with white background, and the red frame of the symbol shall be wide enough to have sufficient warning effect.

Employers may be exempted from labeling if one of the following conditions apply to the containers containing hazardous chemicals:
1.Inner container inside a labeled external one and is served as internal lining that will not be taken out;
2.External container with a labeled inner container and the label is visible from the outside;
3.Portable container with its hazardous chemicals transferred from labeled containers by a worker and only used immediately by the same worker during the shift;
4.Hazardous chemicals transferred from labeled containers only for laboratory to use in experiments or research.

If one of the following conditions applies to the containers containing hazardous chemicals, the employer may install a placard labeling items specified in Paragraph 1 of Article 5 in an obvious location instead of labeling the containers. For a piping system, however, labeling may be substituted by hanging an application plate or by painting the pipelines with specified identification color or symbols:
1.Several containers which contain the same type of hazardous chemicals and are stored in the same location;
2.Ducting or piping systems;
3.Chemical equipment such as reactor, distillation tower, absorption tower, extractor, blender, precipitator, heat exchanger, measuring tank, or storage tank;
4.Equipment such as cooling devices, stirring devices, or compression devices;
5.Conveying apparatus.
Containers with placards prescribed in subparagraphs 2 to 5 of the preceding Paragraph may be exempted from labeling the information required by subparagraph 2(6), Paragraph 1 of Article 5 if the name, address, and telephone number of the manufacturer, importer, or supplier change frequently but the Safety Data Sheet (SDS) is available.

When transporting containers containing hazardous chemicals within the workplace, the employer may be exempted from relabeling as prescribed in Attachment 1 if the containers have already been labeled in accordance with related transportation laws and regulations.
Employers must label containers in accordance with these Regulations when workers engage in operations involving loading and unloading, transporting, handling, or utilization of hazardous chemicals.

Manufacturers, importers, or suppliers shall label the containers prior to providing business entities or self-employed workers with hazardous chemicals.
Article 5 to 9 shall apply, mutatis mutandis, to the previous Paragraph.