Letters of Interpretation

OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.

Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

NOTICE:

How to Request a Letter of Interpretation

Filters


Date Title Standard Number
Clarification regarding the use of eyewash stations. 1910.151, 1910.1200
Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard (HCS). 1910.1200
Distribution of Material Safety Data Sheets. 1910.1200(g)(6)
Requirements for Reporting Health Hazard Information on a Material Safety Data Sheet (MSDS) 1910.1200
Consumer Products that Contain Hazardous Chemicals. 1910.1020, 1910.1200
Worker protection for employees incinerating hazardous waste on cement plant property. 1910.119, 1910.120, 1910.1200
Information on temporary workers, particularly those in the electronic assembly industry. 1926.20, 1926.21, 1910.1200, 1926.59
Information on temporary workers in the electronic assembly industry and office workers. 1910.1200, 1926.59
Hazard Communications Standard. 1910.1200
The coverage of the Hazard Communications Standard (HCS) to crude oil, natural gas, and natural gas condensate. 1910.1200
Standards and regulations applicable in the U.S. for sale, import, handling, and transportation of various chemicals. 1910.1200
Labeling of Latex 1910.1200
OSHA's Hazard Communication Standard. 1910.1200, 1910.1200(b), 1910.1200(b)(6)(vii), 1910.1200(b)(6)(ix), 1910.1200(d), 1910.1200(f), 1910.1200(g)
OSHA's Hazard Communication Standard, the requirements for MSDS. 1910.1200
The (PSM) for Highly Hazardous Chemicals Standard and its applicability to the specific scenarios outlined. 1910.119, 1910.1200
Clarification of OSHA's Hazard Communication Standard with regards to the carcinogenicity of wood dust 1910.1200
Clarification of the OSHA reference to welding rods in a March 21, Memorandum to Regional Administrators. 1910.1200
MSDSs for chemicals purchased prior to 1985. 1910.1200
Letter requesting that OSHA exempt animal feed ingredients from the requirements of 29 CFR 1910.1200, the Hazard Communication Standard. 1910.1200
Request for interpretation of Hazard Communication Standard (HCS). 1910.1200