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
Correct use of product identifiers on safety data sheets and labels 1910.1200, 1910.1200(f)(1), 1910.1200(g)(2)(i)
Requirements for labeling of food additives and intermediate chemicals under the revised Hazard Communication Standard (HCS 2012) 1910.1200(b)(5)
Safety data sheets and label requirements 1910.1200(j), 1910.1200 App C
Intentionally blank pictograms not allowed in HCS 2012 1910.1200(f)
Hazard communication requirements for commercial ink cartridges 1910.1200(b)(6)(v), 1910.1200(f), 1910.1200(g), 1910.1200(h)
Requirement for Unknown Acute Toxicity Statement 1910.1200
Practical accommodation for the labeling of small packages under the Hazard Communication Standard (HCS) 1910.1200, 1910.1200(f)(1)
Use of multiple countries' information on labels of hazardous chemicals 1910.1200, 1910.1200(f)(1), 1910.1200(f)(2), 1910.1200(g)(1)
HCS classification and labeling requirements for products containing crystalline silica 1910.1200, 1910.1200(b)(2), 1910.1200(c)
The requirement for single or multiple SDSs 1910.1200(g)(1), 1910.1200(g)(2)(x), 1910.1200 App D
Applicability of OSHA's Hazard Communication Standard for truck drivers hauling waste products that are exempt by EPA 1910.1200(b)(2), 1910.1200(b)(6)(i), 1910.1200(b)(6)(xi), 1910.1200(c), 1910.1200(h)(1), 1910.1200(h)(2), 1910.1200(h)(3), 1910.1200(h)(3)(ii), 1910.1200(h)(3)(iii), 1910.1096(i)(2)
Acceptable use of pictograms on chemical labels under the revised Hazard Communication standard 1910.1200(f)(1), 1910.1200(f)(1)(iv), 1910.1200 App C
OSHA jurisdiction over railroad employers with regards to the Hazard Communication standard (HCS) 1910.120, 1910.1200
What is the correct grouping/placement of the six required elements for labels 1910.1200(f)(1), 1910.1200(f)(3)
Labeling of secondary containers in laboratories under the Hazard Communication standard 1910.1200(b)(3), 1910.1450(a)(1), 1910.1450(b), 1910.1450(h)(1)(i)
Clarification on combining hazard statements on labels under the hazard communication standard 1910.1200, 1910.1200 App C
Interpretation of 1910.1200 - Clarification on effective date of SDSs replacing MSDSs 1910.1200
CPSC versus HCS 2012 labeling requirements 1910.1200
Acute Toxicity classification under hazard communication 1910.1200, 1910.1200(f)(1)(v)
Applicability of Certain OSHA Standards to Cabin Crew Members on Aircraft in Operation 1910.95, 1910.1030, 1910.1200