By Weisin Chai
To keep up with the updates to the United Nations Purple Book in Globally Harmonized System of Classification and Labelling of Chemicals (GHS), Taiwan’s Bureau of Standards, Metrology and Inspection (BSMI) revised the Taiwan National Standards, CNS 15030 Z1051 Classification and Labelling of Chemicals on January 26, 2015. The standards were originally published on October 12, 2006 and were first amended on December 29, 2008 to align with Revision 2 of the Purple Book. With the latest amendment, the standards are revised based on Revision 4 of the Purple Book.
The following standards have been revised:
- CNS 15030 Z1051-General Rules
- CNS 15030 Z1051-2-Flammable gases (including chemically unstable gases)
- CNS 15030 Z1051-3-Aerosols
- CNS 15030 Z1051-4-Oxidizing gases
- CNS 15030 Z1051-5-Gases under pressure
- CNS 15030 Z1051-6-Flammable liquids
- CNS 15030 Z1051-7-Flammable solids
- CNS 15030 Z1051-11-Self-heating substances and mixtures
- CNS 15030 Z1051-16-Corrosive to metals
- CNS 15030 Z1051-20-Respiratory or skin sensitization
- CNS 15030 Z1051-23-Reproductive toxicity
A contents page and a citation of reference standards were added to the revised standards. In addition, flow charts with decision logic and guidance with calculation formulas are included to facilitate the classifications. For easy reference, instead of naming the symbol, the revision provides a picture of the symbol in the table of label elements. Several technical terms or reference standards are provided in English.
To align with Revision 4 of the Purple Book, CNS 15030 Z1051-2 included the Category A and Category B building blocks for chemically unstable gases. CNS 15030 Z1051-3 is changed from Flammable Aerosols to Aerosols. Category 3 Aerosols is added to the standard. For CNS 15030 Z1051-4, a testing method (ISO 10156:2010) is specified for use in defining oxidizing gases. CNS 15030 Z1051-5 clarifies that Aerosols shall be classified differently and shall not be classified as Gases Under Pressure. This clarification is once again stated in CNS 15030 Z1051-6 for Flammable Liquids. The definition of readily combustible solids in CNS 15030 Z1051-7 has been re-phrased to avoid confusion. A note has been added in the classification of Corrosive to Metals, i.e. “Where an initial test on either steel or aluminum indicates the substance or mixture being tested is corrosive the follow-up test on the other metal is not required.” Category 1 of Respiratory or Skin Sensitization has been split into Category 1A and Category 1B in CNS 15030 Z1051-20. Taiwan does NOT adopt the classification of Hazardous to the Ozone Layer.
Taiwan may revise CNS 15030 according to Revision 5 of the Purple Book in the future, when Revision 5 is more widely used.
Taiwan National Standards, CNS 15030 Z1051 Classification and Labelling of Chemicals (available for purchase)