OSHA HCS 2024: the 20 November 2026 employer deadline for substances is close
OSHA's updated Hazard Communication Standard (aligned to GHS Revision 7) had its compliance dates pushed back four months in January 2026. Chemical manufacturers, importers and distributors had to update substance SDSs and labels by 19 May 2026. Employers now have until 20 November 2026 to update workplace labels, the written HazCom programme, and training where new hazard information applies. Mixtures follow on 19 November 2027. This is no longer only a supplier SDS exercise — employers must turn the new hazard information into workplace communication.
Published10 Sept 2026
EffectiveHCS 2024 in force since 19 July 2024; compliance dates extended four months in January 2026
Compliance deadline20 Nov 2026Employers — substances: 20 November 2026. Manufacturers/importers/distributors — substances: 19 May 2026 (passed). All parties — mixtures: 19 November 2027.
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