4th Revised Edition of the ‘Purple Book’ (GHS) – What’s new

In June of 2011, the fourth revised edition of the UN’s Globally Harmonized System of Classification and Labelling of Chemicals (GHS, Rev.4) was issued.
 
The changes in the latest revision include two new hazard categories : chemically unstable gases and non-flammable aerosols.  These new categories account for hazards not previously addressed where special precautions are needed when handling, storing or transporting these items.  Acetylene, a commonly used welding gas is an example of a ‘chemically unstable gas’.  Acetylene is unstable and can explode without an ignition source at pressures as low as 25 psi (172 kPa).  For that reason, Acetylene is normally sold ‘dissolved’ in porous Acetone to allow for higher pressures.  Additionally, a non-flammable aerosol, still presents a pressurization hazard and can explode if heated, even though it is not technically ‘flammable’.

The 4th Revised Purple Book provides additional clarification of some of the hazard criteria, such as for gases under pressure or mixture cutoffs for Category 1 Carcinogens; and further rationalization of precautionary statements, such as ‘P251 – Do not pierce or burn, even after use’ for non-flammable aerosols as well as flammable aerosols.

Also added, is a new special labelling arrangement for materials that are only corrosive to metals and not corrosive to the skin and eyes.  The new option for the Competent Authority is to allow the hazard pictogram for the ‘Corrosive to metals’ category to be dropped on the label for a product that is in the finished state and packaged for consumer use.

 These changes in the 4th Revised Edition will still require implementation in those Countries or Agencies that have implemented, or have begun to implement, the GHS into current systems.

For further information on all of the revisions in the 4th Revised Purple Book, please consult the United Nations Economic Commission (UNEC) website at:

http://live.unece.org/trans/main/dgdb/dgcomm/ac10rep.html

If you have any questions regarding the changes in the 4th Revised Purple Book, or on the GHS, please contact ICC Compliance Center Inc at 1-888-442-9628 (USA) or 1-888-977-4834 (Canada).

Toni-Ann McLean

Toni-Ann McLean

Toni-Ann McLean has over 17 years experience with writing MSDSs/SDSs for the protection of workers and emergency personnel, as well as determining labeling requirements for the protection of consumers, and of workers and emergency personnel. She specializes in Canadian WHMIS regulations (WHMIS 1988, WHMIS 2015), US OSHA regulations (29 CFR, Hazcom 2012), US and Canadian consumer regulations (US CPSC FHSA & Canadian CCCR 2001), and European regulations (EU DSD/DPD/CLP, CHIP).She is also knowledgable in US Right to Know legislation, EU REACH and Canadian Health and Safety legislation. Toni-Ann has been an active member of the Society for Chemical Hazard Communication (SCHC) for over 13 years where she has learned about upcoming changes to Health & Safety regulations, as well as maintained up to date knowledge of a wide variety of world-wide Health & Safety legislation. She was awarded an SCHC certificate for more than 160 hours of professional development training. Toni-Ann additionally is a current SDS Registered Professional (SDSRP), under the American Industrial Hygiene Association’s (AIHA) SDS & Label Authoring Registry Program.