Hemostatic powder vs hemostatic gauze: both use a clotting agent to help stop serious bleeding, but they're applied differently. Gauze is packed into a wound and held with pressure. Powder or granules are poured into it. For severe bleeding from a deep wound, the U.S. military's Committee on Tactical Combat Casualty Care (CoTCCC) recommends hemostatic gauze. Its guidelines name QuikClot Combat Gauze as the dressing of choice, with Celox Gauze and ChitoGauze as alternatives, applied with at least 3 minutes of direct pressure. Both types expire, and both should be replaced at their printed date.
General information, not medical advice. Get trained: a bleeding control course teaches wound packing and tourniquet use hands-on.
How Do Hemostatic Agents Work?
- Kaolin (QuikClot Combat Gauze and EMS gauze) is a clay that triggers the body's own clotting process. The gauze is impregnated with it and vacuum-sealed.
- Chitosan (Celox, ChitoGauze) comes from shellfish shells. Celox says its granules "swell, gel, and stick together" to form a plug without relying on the body's clotting process, and without producing heat.
- Plant-based powders such as BleedStop are FDA-cleared, sterile polysaccharide particles that absorb fluid and help a clot form.
Older zeolite-based QuikClot granules gave off heat as they worked, which is part of why the field moved to kaolin gauze.
Why Do Trauma Medics Prefer Gauze Over Powder?
The TCCC guidelines recommend hemostatic gauze, not powder. Gauze can be packed tightly down to the bleeding vessel at the bottom of a deep or narrow wound and held there with pressure. Combat medics reported to the CoTCCC that loose powders and granules "do not work well" when the bleeding vessel sits at the bottom of a narrow wound. Gauze is also easier to remove at the hospital.
Powders still have a place for smaller, shallower wounds, such as scrapes, nosebleeds and cuts, where packing isn't practical. Products like BleedStop are designed for that kind of first-aid use.
Does Hemostatic Gauze Expire?
Yes. The manufacturers' stated shelf lives:
| Product | Stated shelf life |
| QuikClot Combat Gauze | 5 years (extended from 3 in 2015; older stock follows its label) |
| Celox Gauze / Celox Rapid Gauze | 5 years |
| Celox granules | 4 years (2 g First Aid granules: 3 years) |
| ChitoGauze XR PRO | 5.5 years from manufacture |
| BleedStop powder | Check the package; not published online |
Sources: Celox FAQ, QuikClot 5-year announcement (JEMS), ChitoGauze XR PRO.
Celox says plainly that efficacy "cannot be guaranteed past the expiry date". The date covers both sterility and the clotting agent. Celox also states its products passed stability testing at high temperatures and through freeze-thaw cycles, but don't take that as permission to keep trauma supplies in a hot car indefinitely.
Do Chest Seals Expire?
Yes. Chest seals rely on adhesive, and adhesive ages. Shelf lives vary by brand and aren't always published, so follow the date on the package and replace any seal whose pouch is damaged. Store them flat and away from heat. See our My Medic vented chest seals (2-pack).
Do Tourniquets Expire?
North American Rescue, the maker of the C-A-T (Combat Application Tourniquet), says there is no expiration date on a C-A-T as long as it remains unused in its protective packaging and is stored somewhere dry, dark and climate-controlled (NAR: do CAT tourniquets expire?). The caveats matter:
- Inspect it. NAR says to check the windlass, the self-adhering band, the edges, the stitching and the color. Discoloration is a sign it's time to replace it.
- It's single-use. Once a tourniquet has been used on a real casualty, don't reuse it.
- Training tourniquets aren't for emergencies. NAR sells a blue training C-A-T for repeated practice, to be used "over and over, but never in a real-world situation." Keep your practice tourniquet and your real one clearly separate.
- Exposure ages it. NAR notes that a tourniquet carried exposed to sun, wind, rain and dust wears out faster and needs replacing more often (NAR: how to store your C-A-T).
What Are the Three Stop the Bleed Actions?
The American College of Surgeons' Stop the Bleed program teaches three actions for life-threatening bleeding: apply pressure, pack the wound, and use a tourniquet (ACS). Hemostatic gauze belongs to the second action, packing. A Stop the Bleed class teaches all three in about an hour, and it's the most valuable thing you can add to a trauma kit.
What Is BleedStop Made Of?
BleedStop is a sterile, plant-based polysaccharide powder that is FDA-cleared as a medical device. It's designed for everyday first-aid bleeding such as cuts, scrapes and nosebleeds, not as a replacement for hemostatic gauze and a tourniquet in a trauma kit. Follow the directions on the package.
What Belongs in a Bleeding Control Kit?
- A tourniquet (C-A-T or similar), stored protected
- Hemostatic gauze, or compressed gauze for packing
- An emergency pressure bandage
- Gloves, trauma shears and a marker
- Chest seals, for a more complete kit
Ready-made options include the NAR Individual Bleeding Control Kit, which includes a C-A-T tourniquet and illustrated instructions.
Common Questions
Is hemostatic powder safe for humans?
Products like BleedStop are FDA-cleared for human first-aid use. Use them as the label directs, and get medical care for serious bleeding.
Does a CAT tourniquet expire?
North American Rescue says no, provided it's unused, in its packaging and stored dry, dark and climate-controlled. Inspect it regularly and replace it if it's discolored or damaged.
Does QuikClot expire?
Yes. QuikClot Combat Gauze is rated for 5 years. Older stock printed with a 3-year date should follow that printed date.
Can I use expired hemostatic gauze?
Manufacturers don't guarantee performance past the date. In your kit, replace it before it expires. Trauma gear is the last place to gamble.
Which should I carry: powder or gauze?
For a trauma kit (IFAK), carry hemostatic gauze and a tourniquet, as TCCC recommends. A powder is a reasonable extra for everyday cuts and nosebleeds.
Shop QuikClot EMS hemostatic gauze, BleedStop powder, the My Medic Bleed Stopper Med Pack, and first aid and trauma kits. For your whole kit, see First Aid Kit Expiration Dates.
