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
Labeling of Secondary Containers 1910.1200(f)(6)(ii)
Separate SDSs and labels for dual components 1910.1200, 1910.1200(f)(1), 1910.1200(g)(1), 1910.1200(g)(2)
Labeling outer containers of chemical cleaning products while in storage. 1910.1200(b)(4), 1910.1200(f)(1), 1910.1200(f)(6)
Training requirements for emergency response medical service 1910.120, 1910.120(q)(6), 1910.120(q)(6)(i)
Labeling small containers 1910.1200(f)(1)
Hazard Communication Standard's (HCS 2012) June 1, 2016 effective date, 1910.1200(j) 1910.1200(f)(9), 1910.1200(f)(11), 1910.1200(j)
Applicability of OSHA standards to formaldehyde exposures in laboratories 1910.106, 1910.106(a)(31), 1910.106(d)(4), 1910.1048, 1910.1048(d), 1910.1048(e), 1910.1048(h)(1), 1910.1048(j)(4), 1910.1048 App A, 1910.1200(b)(3), 1910.1450, 1910.1450(a)(2), 1910.1450(d), 1910.1450(g)(1)(ii)
Safety Data Sheets for grinding wheels and abrasives 1910.1200, 1910.1200(b)(1), 1910.1200(b)(2), 1910.1200(c), 1910.1200(d)(1), 1910.1200(f)(1), 1910.1200(f)(4)
Hazard Communication Standard – Classifying 'Articles' 1910.1200, 1910.1200(b)(2), 1910.1200(c), 1910.1200(g)
Clarifications to CPL 02-02-079, Inspection Procedures for the Hazard Communication Standard (HCS 2012) 1910.1200
HCS 2012 labeling of refrigerant containers 1910.1200, 1910.1200(c), 1910.1200(b)(4), 1910.1200(f)(1), 1910.1200(f)(5), 1910.1200(f)(6)
Labeling refrigerant cylinders 1910.1200(c), 1910.1200(f)(1), 1910.1200(f)
Container labeling requirements for importer under HCS 2012 1910.1200, 1910.1200(c), 1910.1200(f)(1)
Responsible party's address and phone number on SDSs and labels 1910.1200(c)
Requirements for labeling of products shipped for export to domestic and international destinations, under the revised Hazard Communication Standard (HCS 2012) 1910.1200(f)(1)(i), 1910.1200(f)(1)(ii), 1910.1200(f)(1)(iii), 1910.1200(f)(1)(iv), 1910.1200(f)(1)(v), 1910.1200(f)(1)(vi)
By-product hazard information included in safety data sheet, Section 2 1910.1200, 1910.1200(g)(2)
Safety data sheets for custom blend fertilizers 1910.1200, 1910.1200(b)(1), 1910.1200(f)(1), 1910.1200(f)(5), 1910.1200(g)(1), 1910.1200(g)(4)
HCS Applicability of lithium battery or a lithium battery-powered devices 1910.1200, 1910.1200(b)(1), 1910.1200(b)(6), 1910.1200(c)
Labeling requirements for absorbent clay products in various packaging configurations 1910.1200(d), 1910.1200(f)(1)(i), 1910.1200(f)(1)(ii), 1910.1200(f)(1)(iii), 1910.1200(f)(1)(iv), 1910.1200(f)(1)(v), 1910.1200(f)(1)(vi)
Hazard Communication classifications 1910.1200(b)(1), 1910.1200(d)(1), 1910.1200(d)(2), 1910.1200 App B