Dust Hazard Analysis (DHA) for Pharmaceutical and Supplement Powders

By DHA Report Group · Updated October 20, 2026

If you make tablets, capsules, or powder blends, your rooms probably look cleaner than most plants ever will. Even so, the powders you dispense, blend, and compress every day are mostly fine, dry, organic materials. Under NFPA 660, many of them are combustible dusts, and that is why an insurer or a customer audit may ask you for a dust hazard analysis (DHA).

Which pharmaceutical and supplement powders are combustible dusts?

Most of what you handle in powder form belongs on the list. Common ones include:

• Active ingredients. Most are organic compounds, and many are milled very fine.
• Excipients. Lactose, starches, cellulose, sugars, and lubricants such as magnesium stearate.
• Vitamins. Ascorbic acid and many vitamin premixes.
• Protein powders. Whey, soy, pea, and other protein concentrates.
• Botanical powders. Ground roots, leaves, and dried herbal extracts.

Some mineral ingredients, such as calcium carbonate and talc, do not burn by themselves. A blend that contains them can still be combustible, so judge the blend and not only its parts.

Fine, dry powders can ignite at low energy. That is one reason dust testing is common in this sector, especially for milled and micronized materials. Our guide to combustible dust testing explains what each test tells you.

Where a DHA looks in your plant

A DHA follows your powder from receiving to packaging and asks the same questions at each step. Where is the dust? Can it get into the air? What could ignite it? In your plant that usually means:

• Dispensing and weighing. Scooping, bag dumping, and drum charging, including the booths and local exhaust that serve them.
• Blending. Bin, ribbon, and V blenders, with attention to charging and discharge.
• Milling and micronizing. Mills make your finest dust and add mechanical energy at the same point.
• Granulation and fluid bed drying. Warm air, dry powder held in suspension, and sometimes a flammable solvent in the same vessel.
• Tablet presses and capsule fillers. The machines themselves and the dust extraction connected to them.
• Dust collectors. What each one serves, where it sits, and how it is protected.
• Central vacuum systems. The piping, the separator, and what gets vacuumed up.

Common gaps in pharmaceutical and supplement plants

These come up often, and none of them mean your plant is poorly run.

• Safety Data Sheets without dust data. Many ingredient Safety Data Sheets say little about dust behavior. For a new or proprietary material there may be no published data at all.
• Many products, few test results. You may have test data on one or two materials while the same equipment runs dozens.
• Static control. Flexible connections, plastic liners, bulk bags, scoops, and portable bins all need a look for grounding and bonding.
• Solvent and dust together. Where a flammable solvent is present with powder, the mixture can be easier to ignite than the dust alone.
• Collectors indoors. Containment and climate often put collectors inside the building, which shapes the protection options.
• Dust you cannot see. Production rooms are spotless, while dust settles inside ductwork, above ceilings, in mechanical spaces, and inside machine enclosures.
• Vacuums. Portable and central vacuums that were chosen for cleaning, without combustible dust in mind.

When a DHA is not what you need

A DHA is about combustible dust. Some operations fall outside that.

• No open powder. If your site handles only liquids, gels, or finished packaged product, a DHA is probably not what you need.
• A current DHA already covers your process. If your study is less than five years old and nothing has changed, you are likely fine until the next review.
• You only need test results. If the open question is how one material behaves, a dust testing lab answers that directly.
• You need a PE stamp. We do not provide a PE stamp. Your own PE can review the report.

We also do not sell dust collectors or equipment, so the report will not point you to a product.

What you will need for your DHA

Gather what you already have:

• A layout showing rooms, equipment, and dust collection
• Photos of each process step and of places where dust settles
• Safety Data Sheets for your active ingredients, excipients, and blends
• Any dust test results you have
• Collector and vacuum system information
• A short description of how each product moves through the plant

Most pharmaceutical and supplement plants can be studied remotely from drawings, photos, and process information. Most DHAs finish in 2 to 4 weeks from retainer and complete documents, depending on complexity. For how a study is quoted, see what a DHA costs.

Keep reading

• NFPA 660 Guide: Which Chapter Covers Your Facility
• Dust Hazard Analysis (DHA) for Plastics, Resins, and Regrind
• Is My Dust Combustible? How to Find Out Before Your DHA
• Dust Collector Explosion Protection: Venting, Isolation, and Suppression Explained

Questions about DHAs for pharmaceutical and supplement powders

Are pharmaceutical powders combustible dusts?

Many are. Most active ingredients and common excipients such as lactose, starch, and cellulose are organic materials that are combustible as a fine, dry powder.

Are protein and botanical powders combustible?

Yes, in most cases. Protein concentrates and ground botanicals are organic powders and are generally treated as combustible dusts.

Do I need to test every ingredient before a DHA?

No. A DHA can treat a dust as combustible without testing. Testing is common in this sector where a fine powder may ignite at low energy or where protection has to be designed.

Does a clean production room mean there is no dust hazard?

Not by itself. A DHA also looks inside equipment, ductwork, dust collectors, and vacuum systems, where powder collects out of sight.

Can a DHA for a pharmaceutical plant be done remotely?

Usually, yes. Most DHAs are done remotely from drawings, photos, and process information.