In the previous post, we described potential changes that have a strong chance of being present in the next edition of GHS. The official text of the GHS, known as the “Purple Book”, is updated every two years. The fifth revised edition was released in 2013, therefore the next version of the GHS, the sixth edition, is planned to be released next year.
The report of the 27th session of the UN Sub-Committee of Experts on GHS held on July 2-4, 2014 provides a list of the proposed draft amendments to the fifth edition of the GHS. In this post, we describe other potential changes that have a strong chance of being present in the next edition of GHS.
Precautionary statement P233 (“Keep container tightly closed”) was originally assigned in order to align with the precautionary phrases used for pyrophoric solids and liquids. This phrase is not used for other gases, such as flammable gases, as gases are provided in cylinders or closed receptacles. The experts agreed to correct this oversight in an informal paper.
Moreover, the following text is proposed to be added in the section on the decision logic and guidance for flammable gases:
“Flammable gas mixtures, which have not been tested for pyrophoricity and contain more than one percent pyrophoric components, should be classified as a pyrophoric gas. Expert judgement on the properties and physical hazards of pyrophoric gases and their mixtures should be used in assessing the need for classification of flammable gas mixtures containing one percent or less pyrophoric components. In this case, testing need only be considered if expert judgement indicates a need for additional data to support the classification process.”
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