Custom Fertilizer Blending and SDS Requirements: What Ag Retailers Need to know

There are a lot of rules out there that sit quietly in the background for years.

Everyone kind of knows they exist. Everyone kind of knows they should probably be doing something about them. But until there is a deadline, an OSHA inspection, a citation, or some expensive regulatory heat, it is easy for those requirements to get pushed down the list.

This is one of those issues.

If your agribusiness or ag retail location custom blends fertilizer, you may need Safety Data Sheets for the finished blended products, not just the individual ingredients sitting in the bins.

And yes, this is starting to matter. Citations related to this issue have recently happened, which means this is not just a “someday compliance” topic anymore.

What Is the Issue?

Many ag retailers receive fertilizer ingredients from suppliers and keep Safety Data Sheets on file for those individual products.

Common examples include:

• Urea

• MAP

• DAP

• Potash

• Ammonium sulfate

• UAN

• Micronutrients

• Stabilizers

• Additives

• Specialty fertilizer products

That part is familiar. You receive the product, you keep the SDS, and you make sure employees have access to the information.

The issue starts when the facility takes those products and custom blends them into a finished fertilizer blend for a customer.

Under OSHA’s Hazard Communication Standard, custom blending fertilizer may be considered “producing” a chemical. That means the finished blend may need to be classified and covered by an SDS that accurately represents the hazards of the final blended product.

In plain English:

The SDS for urea covers the urea.

The SDS for potash covers the potash.

But if you blend urea, potash, MAP, and other products into a finished fertilizer blend, OSHA may expect SDS coverage for that finished blend too.

“But We Are Just an Ag Retailer”

I get it.

Most ag retailers do not think of themselves as chemical manufacturers. You are not running a giant chemical plant. You are receiving fertilizer, blending it for customers, loading trucks, helping producers, and trying to get through the season without everything turning into complete chaos.

But OSHA’s Hazard Communication language is broader than how we use these words in everyday business.

Under HazCom, producing a chemical can include blending or formulating. That is why custom fertilizer blending can trigger responsibilities beyond simply keeping supplier SDSs on file.

This does not mean the facility is doing something wrong by blending fertilizer. It means the safety documentation has to match what the facility is actually doing.

Supplier SDSs Are Still Needed

Do not throw the supplier SDSs out. You still need them.

In fact, the first step is to start compiling current SDSs for the fertilizer products brought into each location.

That includes products from different manufacturers or suppliers. Even if two products have the same common name, the SDS may not be identical. Different manufacturers may have different additives, coatings, anticaking agents, impurities, classifications, or emergency contact information.

For example, one location may need SDSs for:

• Urea from Supplier A

• Urea from Supplier B

• Potash from Supplier A

• Potash from Supplier B

• MAP or DAP from each supplier used

• Liquid fertilizer products

• Micronutrients

• Stabilizers

• Additives

• Treated or specialty fertilizer products

Those supplier SDSs are the starting point. From there, the facility needs to evaluate the finished blends being produced.

Does Every Single Blend Need Its Own SDS?

Not always.

This is where people either underreact or overreact.

The answer is not necessarily, “You need a separate SDS for every single load that leaves the plant.”

But the answer is also not, “We have SDSs for the raw ingredients, so we are good.”

The practical answer is:

You need SDS coverage for the finished blended products.

That may mean individual SDSs for certain blends, or it may mean generic SDSs for similar blend families.

What Is a Generic SDS?

A generic SDS is an SDS that covers a group of similar mixtures with similar hazards and similar ingredients.

For example, a facility may be able to use a generic SDS for a family of standard dry N-P-K fertilizer blends if the ingredients are essentially the same and the hazards do not change.

A generic SDS may use percentage ranges instead of one exact formula. That can make sense because fertilizer blends vary based on customer needs.

Example:

• Urea: 20% to 45%

• MAP or DAP: 10% to 35%

• Potash: 15% to 40%

• Ammonium sulfate: 0% to 15%

• Micronutrient package: 0% to 5%

Those numbers are only examples. The actual ranges would need to be based on the facility’s real products, blend records, formulas, and supplier SDS information.

The important part is that the SDS still has to tell the truth about the hazards of the finished product.

A generic SDS should not be so broad that it tries to cover everything made at the plant. If an SDS basically says, “This could contain almost anything from 0.1% to 98%,” that is not a strong compliance position.

A good rule of thumb:

A generic SDS can cover a blend family. It should not try to cover the entire fertilizer department.

When Separate SDSs May Be Needed

Separate SDSs or separate SDS families may be needed when the ingredients or hazards change.

Examples may include:

• Standard dry fertilizer blends

• Liquid fertilizer blends

• Fertilizer blends with micronutrients

• Fertilizer blends with stabilizers or additives

• Blends containing pesticide products

• Specialty fertilizer blends

• Products with corrosive, oxidizer, combustible dust, or other unique hazards

The more the hazard profile changes, the harder it is to justify putting everything under one generic SDS.

If the blend has different ingredients, different hazards, or different employee/customer handling concerns, it probably needs a closer look.

Why This Matters Now

This is one of those compliance issues that many facilities may have overlooked because it was not always heavily enforced.

But citations have recently happened, and once enforcement activity starts showing up, it tends to get everyone’s attention in a hurry.

That is usually how compliance works in the real world. A requirement may sit quietly for years, and then suddenly someone gets cited, someone loses an argument, a deadline approaches, or an inspector starts asking better questions.

Then everyone realizes the “paperwork issue” was actually a real compliance exposure the whole time.

For fertilizer blending, the concern is not just whether there is a binder full of SDSs somewhere in the office.

The question is whether the SDS system accurately reflects:

• What products are brought into the location

• What products are blended

• What finished products are leaving the location

• What hazards employees are exposed to

• What hazard information customers receive

• What labels, shipping papers, or product documentation are being used

• Whether the written HazCom program matches actual operations

HCS 2024 Deadline for Mixtures

OSHA’s updated Hazard Communication Standard includes compliance deadlines for mixtures.

For chemical manufacturers, importers, and distributors evaluating mixtures, the current compliance deadline is November 19, 2027.

Employers then have until May 19, 2028 to update workplace labels, written HazCom programs, and employee training as necessary for newly identified hazards.

That may sound far away, but anyone who works in ag knows how fast one season turns into the next. Waiting until the deadline is how this turns into a panic project.

Practical Steps for Ag Retailers

If your location custom blends fertilizer, now is a good time to start cleaning this up.

Recommended steps:

1. Make a list of every fertilizer product brought into each location.

2. Compile current SDSs for each product from each manufacturer or supplier.

3. Identify the types of dry and liquid fertilizer blends produced.

4. Group similar blends by ingredients and hazards.

5. Determine whether finished blends need individual SDSs or can be covered by a generic SDS family.

6. Review whether percentage ranges are realistic and based on actual blending practices.

7. Review labels, bills of lading, customer SDS distribution, and tender/loadout paperwork.

8. Update the written Hazard Communication Program.

9. Make sure employees know how to access SDSs during their shift.

10. Train employees on any new or revised hazard information.

This does not have to be a nightmare, but it does need to be organized.

The Big Takeaway

If your agribusiness custom blends fertilizer, do not assume supplier SDSs for individual ingredients are enough.

OSHA has made it clear that custom blending fertilizer can be considered producing a chemical under the Hazard Communication Standard. That means the finished blend may need SDS coverage that accurately reflects the hazards of the final product.

Generic SDSs may be allowed for similar blend families, but they need to be defensible. They should be based on real ingredients, real ranges, and real hazards.

This is one of those “fix it before it gets expensive” compliance items.

If your facility needs help reviewing fertilizer SDSs, grouping blend families, updating your HazCom program, or figuring out what finished blend SDSs may be needed, give me a call.

Northern Plains Compliance Consulting can help you sort through the requirements, organize your SDS process, and build a practical path forward before OSHA, a customer, or an audit forces the issue.