The Joint TDG-GHS informal working group (IWG) dealing with the categorization of flammable gases was organized in Brussels from 9 to 11 March 2015 by the Belgian and the Japanese delegations to the TDG and GHS sub-committees. The participants (physically/by phone) list can be found in Annex 1of this report. The purpose of this IWG was to review the current criteria and discuss possible modifications to the GHS Flammable Gas Category 1 (extremely flammable gases). The participants were reminded of the mandate given to this IWG during the plenary sessions of the GHS and TDG sub-committees(1-12 December 2014, Geneva). The mandate can be found in Annex 2 of this report.
Mandate item 1(a): Analysis of the necessity to create GHS subcategories, within Category1, for flammable gases
Mandate Item 2 (a): Evaluation of the most appropriate additional parameters for modified classification criteria