The Hazard Communication Standard (HCS or HazCom) is intended to ensure that employers make their employees aware of the hazards to which they may be exposed. This is accomplished by having a written hazard communication program that addresses how they will communicate hazards to their employees, by using labels, and maintaining safety data sheets (SDS) and/or material safety data sheets (MSDSs), and by having a training program. Hazcom is one of the most important and also one of the most frequently violated OSHA standards.
OSHA has adopted amendments to the HazCom rule effective May 25, 2012 that include new Globally Harmonized System, or GHS, requirements for the classification of chemicals, new chemical labels, and SDSs. The GHS amendments will be phased-in over a 4-year period. See the GHS Phase-In Compliance Dates Chart in the analysis for the list of requirements and their phase-in compliance dates.