Yes, your custom chemical blending must have GHS-compliant labels before they ship, and your blending supplier is primarily responsible for making that happen.
But procurement teams cannot assume compliance will happen automatically.
GHS chemical labeling requirements apply to every hazardous chemical, including custom blends, and getting this wrong can result in OSHA fines, supply chain disruptions, and serious safety risks for workers who handle the product.
Today, we explain what you need to know and what to ask your supplier before you take delivery.
What Is GHS and Why Does It Apply to Custom Blends?
GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals. It is an international framework developed to standardize how chemical hazards are communicated across borders.
In the United States, OSHA adopted GHS through its HazCom 2012 standard, which updated the existing Hazard Communication Standard to align with GHS requirements.
A common misconception in procurement is that custom blends fall outside of GHS chemical labeling requirements because they are not off-the-shelf products.
This is incorrect.
OSHA HazCom 2012 is clear that if a chemical is hazardous and it is released into commerce, it must carry a compliant GHS label and be accompanied by a Safety Data Sheet. The fact that a formulation is custom does not exempt it from chemical label compliance in Texas or anywhere else in the US.
The Six Required Elements on a GHS Chemical Label
Every GHS-compliant label for a hazardous chemical must include six required elements. If any of these are missing, the label is non-compliant, regardless of how the product is described.
- Product identifier: The name or number used to identify the chemical, matching what appears on the Safety Data Sheet.
- Signal word: Either Danger or Warning, depending on the hazard severity.
- Hazard statements: Standardized phrases that describe the specific hazard presented by the chemical.
- Pictograms: The standardized GHS symbols in a red diamond border, indicating the type of hazard, such as flammable, corrosive, or toxic.
- Precautionary statements: Instructions for safe handling, storage, disposal, and first aid responses.
- Supplier identification: Name, address, and telephone number of the manufacturer or responsible party.
All six must appear on every container. GHS chemical labeling requirements also specify that labels must be durable, legible, and sized appropriately for the container.
A label that works on a 55-gallon drum may not satisfy requirements when applied to a smaller container.
Who Is Responsible for GHS Compliance on Custom Blends?
The manufacturer or formulator of the blend bears primary responsibility under OSHA HazCom 2012. If you commission a custom blend from a toll blender, that blender is the manufacturer of record and must produce a compliant label and SDS before shipment.
But procurement teams still have obligations before accepting delivery:
- Verify that the label includes all six required GHS elements before the shipment arrives at your facility.
- Confirm that the SDS covers every hazardous component in the blend, not just the primary ingredient.
- Check that the supplier identification on the label matches the blender you actually contracted with, not a generic name.
- Request label artwork in advance so you can review it before the first production run.
The situation changes if you repackage or relabel the product.
If your company transfers a custom blend into different containers and applies your own label, OSHA treats you as the manufacturer under HazCom 2012.
At that point, custom chemical blend labeling compliance becomes your responsibility, and you must produce a GHS-compliant label and SDS.
This is a significant obligation that many procurement teams do not anticipate until there is an inspection or incident.
Safety Data Sheets: What You Must Receive With Every Blend?
A Safety Data Sheet is required for every hazardous chemical. OSHA HazCom 2012 specifies that a compliant SDS must contain 16 sections covering:
- identification,
- hazard information,
- composition,
- first aid measures,
- firefighting measures,
- accidental release measures,
- handling and storage,
- exposure controls and personal protection,
- physical and chemical properties,
- stability and reactivity,
- toxicological information,
- ecological information,
- disposal considerations,
- transport information,
- regulatory information, and
- other relevant data.
For custom blends, verifying SDS accuracy requires extra attention. Check that the SDS correctly reflects the actual composition of the blend, not a generic template.
SDS requirements for chemical manufacturers obligate the formulator to disclose all hazardous ingredients at or above threshold concentrations. Ask your blender to confirm this is reflected in the SDS they provide.
On the receiving end, you must make SDS documents readily accessible to workers who handle the chemicals at your facility. OSHA requires this. Keep copies in the work area, update them when formulations change, and maintain records of when you received each version.
Practical Checklist for Procurement Teams
Before you finalize a custom blend order, work through this checklist with your supplier:
- Request GHS-compliant label artwork before the first delivery and review it against the six required elements.
- Verify that the SDS covers all hazardous components in the blend, not just the primary active ingredient.
- Confirm that the label format and size match the container size requirements for the specific packaging you are ordering.
- Establish an update procedure for formulation revisions so that label and SDS changes happen before the updated product ships, not after.
- Confirm whether the blender offers chemical labeling as part of their packaging service, which can simplify compliance on your end.
- Document your review process so you can demonstrate due diligence if your facility undergoes an OSHA inspection.
Chemical label compliance in Texas and across the US is not optional. Procurement teams that treat GHS compliance as a supplier-only concern create real risk for their organizations.
A quick checklist review before each new blend relationship starts is a small investment against a costly enforcement action.
Frequently Asked Questions
Q: Are custom chemical blends required to have GHS labels?
Yes.
Under OSHA HazCom 2012, any hazardous chemical, including custom blends, must carry all required GHS elements before shipment. Custom blends are not exempt from GHS chemical labeling requirements.
Q: Who creates the Safety Data Sheet for a custom blend?
The manufacturer or formulator of the blend is responsible for preparing the SDS. SDS requirements for chemical manufacturers apply to whoever produces the formulation, which in most toll blending arrangements is the blender.
Q: What happens if a custom blend is relabeled by the distributor?
If the distributor repackages or relabels the product, they take on the role of manufacturer under HazCom 2012 and become responsible for GHS compliance on the new label and SDS. Custom chemical blend labeling obligations transfer to whoever puts their name on the container.
Q: How often must SDS be updated?
OSHA requires SDS to be updated whenever new hazard information becomes available. A revised SDS must be provided to customers within three months of the update. SDS requirements for chemical manufacturers include maintaining current versions and distributing them to downstream users.
Q: Can a toll blender handle GHS labeling on my behalf?
Yes.
Many toll blending companies offer chemical labeling services as part of their packaging offering. Confirm that any labels they produce meet GHS chemical labeling requirements for the specific chemical class and container type before agreeing to rely on their labeling service.
