In the Trump Administration’s Unified Agenda of Regulatory and Deregulatory Actions (Regulatory Agenda) issued on October 17, 2018, the U.S. Department of Labor’s Occupational Safety and Health Administration (OSHA) published a Proposed Rule Stage item titled “Update to the Hazard Communication Standard,” RIN 1218-AC93, and scheduled the Notice of Proposed Rulemaking (NPRM) to be issued by March 2019. The full description of the item is:

OSHA and other U.S. agencies have been involved in a long-term project to negotiate a globally harmonized approach to classifying chemical hazard and providing labels and safety data sheets for hazardous chemicals. The result is the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). The GHS was adopted by the United Nations, with an international goal of as many countries as possible adopting it by 2008. OSHA incorporated the GHS into the Hazard Communication Standard (HCS) in March 2012 to specify requirements for hazard classification and to standardize label components and information on safety data sheets, which will improve employee protection and facilitate international trade. However, the GHS is a living document and has been updated several times since OSHA’s rulemaking. OSHA's rulemaking was based on the third edition of the GHS and the UN recently completed the seventh. OSHA is conducting rulemaking to harmonize the HCS to the latest edition of the GHS and to codify a number of enforcement policies that have been issued since the 2012 standard.

OSHA first notified the Office of Management and Budget (OMB) in the spring of 2018 that it intended to publish this NPRM to update its HCS to align with the latest edition of the GHS; the only difference is that it scheduled it to be issued by February 2019 instead of March 2019 -- a difference of only one month. OSHA plans to update its HCS “to the latest edition of the GHS and to codify a number of enforcement policies that have been issued since the 2012 standard.” The official text of the GHS -- also known as the “Purple Book” -- was first published and implemented by the United Nations (UN) in 2003 and is amended every two years. OSHA’s final rule incorporating the 3rd Revised Edition of the UN GHS (Rev 3) became effective on May 25, 2012 (HCS 2012) and full implementation was required as of June 1, 2016. Currently, all substances and mixtures are required to comply with HCS 2012, as the transition period ended on June 1, 2015, for manufacturers and December 1, 2015, for distributors. OSHA extended the deadline under very specific circumstances on May 29, 2015, but those circumstances are considered to be limited and must be documented to demonstrate compliance.

As the UN Sub-Committee of Experts on the Globally Harmonized System of Classification and Labeling of Chemicals (UNSCEGHS) released the seventh edition (Rev 7) of the GHS in July 2017, OSHA’s HCS specifically needs to be updated to conform with not just Rev 7 but also with the fourth (Rev 4), fifth (Rev 5), and sixth (Rev 6) revised editions. Rev 7 includes both amendments and some newly added content and guidance relating to the classification and labeling of chemical substances and mixtures. OSHA announced that to maintain alignment with GHS, it would be updating its HCS in the following ways to align potentially with GHS Rev 7:

• Appendix A (health hazards): mostly editorial;
• Appendix B (physical hazards):
  • Flammable gases, desensitized explosives;
  • Aerosols -- align with GHS Rev 6/7, include Category 3;
• Appendix C (label elements):
  • New or updated hazards, updated guidance, and precautionary statements;
• Appendix D (Safety Data Sheet (SDS)):
  • Updates to SDS Sections 2, 5, 7, 9.

The above list is only a small portion, however, of all of the amendments that GHS has integrated since Rev 3. Below is a comprehensive list of changes made to Rev 4, Rev 5, Rev 6, and Rev 7; we anticipate that some of the below revisions will also be integrated.

The full list of edits made to Rev 3 and incorporated into Rev 4, issued in 2011, is available here; some of the highlights are:

1. Create new physical hazard categories: (1) chemically unstable gases; and (2) non-flammable aerosols;
2. Rationalization of precautionary statements; and
3. Clarification of certain criteria to assist in classification processes.

The full list of edits made to Rev 4 and incorporated into Rev 5, issued in 2013, is available here; some of the highlights are:

1. A new test method for oxidizing solids;
2. Miscellaneous provisions intended to clarify further the criteria for some hazard classes (skin corrosion/irritation, severe eye damage/irritation, and aerosols) and to complement the information to be included in the SDS;
3. Revised and simplified classification and labeling summary tables;
4. A new codification system for hazard pictograms; and
5. Revised and further rationalized precautionary statements.

The full list of edits made to Rev 5 and incorporated into Rev 6, issued in 2015, is available here; some of the highlights are:

1. A new hazard class for desensitized explosives;
2. A new hazard category for pyrophoric gases;
3. Miscellaneous provisions intended to clarify the criteria for some hazard classes (explosives, specific target organ toxicity following single exposure, aspiration hazard and hazardous to the aquatic environment);
4. Additional information to be included in the SDSs (Section 9);
5. Revised and further rationalized precautionary statements;
6. A new example in Annex 7 addressing labeling of small packagings; and
7. Clarification on criteria for several hazard classes and further rationalization of precautionary statements.

The full list of edits made to Rev 6 and incorporated into Rev 7, issued in 2017, is available here; some of the highlights are:

1. Changes to categories for Chapter 2.2 Flammable Gases. Category 1 is expanded to include sub-categories -- specifically:

2. Miscellaneous amendments intended to clarify the definitions of some health hazard classes;

3. Additional guidance to extend the coverage of Section 14 of the SDSs to all bulk cargoes transported under instruments of the International Maritime Organization (IMO), regardless of their physical state (Annex 4);

4. Revised and further rationalized precautionary statements in Annex 3; and

5. A new example in Annex 7 addressing labeling of small packagings with fold-out labels.

Commentary

One change appearing in every edition is the further rationalization of precautionary statements. Although it seems a bit vague and bureaucratic in nature, if OSHA attempts to conform the HCS to align with the GHS, rationalizing precautionary statements could signal big changes for Appendix C: Allocation Of Label Elements and Appendix D: Safety Data Sheets, and any textual changes to these mandatory requirements could mean very costly consequences for manufacturers and distributors if they are required to make major changes in their product labeling and in their SDSs. When OSHA updated the HCS in 2012, OSHA stated that “modifications will significantly reduce costs and burdens while also improving the quality and consistency of information provided to employers and employees regarding chemical hazards and associated protective measures” and “enhance the effectiveness of the HCS in ensuring that employees are apprised of the chemical hazards to which they may be exposed, and in reducing the incidence of chemical-related occupational illnesses and injuries.” Conforming with GHS is not a statutory directive, but over 24 jurisdictions across the world have adopted some form of the GHS model into their regulatory framework, in strikingly different ways, and with varying speeds for implementation. Any changes proposed to the HCS would aspirationally be made in the same spirit as those made in 2012 -- in a way to reduce costs and administrative burdens while also improving the quality and consistency of information provided to employers and employees regarding chemical hazards and associated protective measures -- and also implemented at a longer pace so as to allow the entities required to implement them to integrate changes in a planned and constructive way. In addition, if the intent is to align continually with GHS, OSHA must decide how and when to address subsequent updates to the UN model. The 8th revised edition (Rev 8) should be released in 2019. OSHA, in proposing to update Rev 7 in 2019, would need to consider how changes from Rev 7 to Rev 8 might be incorporated in the future.

Karin Baron, MSPH, is Senior Regulatory Consultant with Bergeson & Campbell, P.C. (B&C®) and has more than 15 years' experience developing, implementing, and managing complex chemical regulatory compliance matters for some of the largest industrial and specialty chemical companies in the world. Her primary areas of practice include hazard and risk assessment and communication, industrial hygiene and environmental health and safety (EHS) programs, U.S. Food and Drug Administration (FDA) regulations pertaining to food contact materials, and the Globally Harmonized System of Classification and Labeling of Chemicals (GHS), including compliant safety data sheets (SDS).