REGULATORY ALERT: OSHA Requests Comments on Weight of Evidence Guidance

8 March, 2016

What’s Happening?

OSHA has requested comments from the general public on its draft Guidance on Data Evaluation for Weight of Evidence Determination (OSHA-2016-0004).
How Could it Impact Me?

OSHA HazCom 2012 requires safety data sheet and label authors to consider all available information for classifying a chemical or mixture. OSHA’s new draft document provides guidance on how to develop a weight-of-evidence approach for assessing multiple types of data. Comments on OSHA’s suggested approach may be submitted up to  March 31st. 

Quick Summary:

As noted in a press release, on February 16, OSHA will begin accepting comments on their draft Guidance on Data Evaluation for Weight of Evidence Determination (OSHA-2016-0004). This is a companion document to a recently posted Hazard Classification Guidance under the Hazard Communication Standard (HCS). In 2012 when OSHA updated the HCS, there was an important change that now requires manufacturers to consider the weight of evidence (WoE) as part of the process for determining the potential health hazards of a chemical.  The WoE approach allows all available information to be considered when classifying hazardous chemicals. The original HCS provided a threshold for chemicals to be considered hazardous based on a single study. OSHA now expects the hazard evaluation process to go beyond simply identifying one positive study and to include a complete evaluation of all of the available information when determining what would be appropriate to include on the label and the safety data sheet (SDS). OSHA’s draft provides the label and SDS preparer guidance on how to apply the WoE approach when dealing with complex scientific studies. Comments will be accepted until March 31, 2016. Comments may be posted directly to using Docket OSHA-2016-0004.

Contact Us:

CPS regulatory scientists have extensive experience in applying weight of evidence to a variety of toxicological endpoints for hazard classification and can assist you in utilizing this approach in your GHS hazard classification efforts.