IRONPUR™ vs Tower 28 SOS Spray: Which Hypochlorous Acid Mist Is Best?
IRONPUR™ vs Tower 28 SOS Spray — The Honest Comparison
Tower 28's SOS Daily Rescue Spray helped put hypochlorous acid on the map. If you've searched "hypochlorous acid spray for face" in the last two years, chances are you've seen it. IRONPUR™ is a newer, direct-to-consumer HOCl mist built around the same molecule — but with different priorities on size, price, and packaging.
Here's an honest side-by-side.
At a Glance
| IRONPUR™ | Tower 28 SOS Spray | |
|---|---|---|
| **Size** | 8 oz | 4 oz |
| **Price** | $17.99 | ~$28 |
| **Price per oz** | ~$2.25 | ~$7.00 |
| **Ingredients** | 3 (water, salt, HOCl) | 3 (water, salt, HOCl) |
| **Bottle** | Opaque black (light-blocking) | Translucent |
| **Fragrance** | None | None |
| **Alcohol** | None | None |
Same Molecule, Different Formulas
Both products deliver stabilized hypochlorous acid (HOCl) — the same gentle molecule your white blood cells naturally produce. Both are alcohol-free, fragrance-free, and safe for daily use on face and body. On the core ingredient, they're closely matched.
The real differences are size, price, and packaging.
Why Packaging Matters for HOCl
Hypochlorous acid is famously effective but famously unstable. Exposure to light, heat, and air slowly converts HOCl back into saltwater — which is why the way a bottle is designed matters more than most people realize.
Both brands source stabilized HOCl, but the black bottle gives IRONPUR™ a shelf-life edge — especially once it's on your bathroom counter under warm bulbs.
Value: 8 oz for $17.99 vs 4 oz for ~$28
This is the biggest gap. IRONPUR™ ships twice the volume for roughly two-thirds the price. At about $2.25 per ounce vs ~$7 per ounce, IRONPUR™ costs roughly one-third as much per spray.
For a product you use daily — after workouts, after shaving, mid-day over sunscreen — the price-per-ounce compounds fast.
When Tower 28 Might Be the Better Pick
When IRONPUR™ Is the Better Pick
The Bottom Line
Both are clean, well-made hypochlorous acid mists with only 3 ingredients. If you're deciding between them for the first time, IRONPUR™ is the better value by a wide margin — same molecule, twice the size, roughly one-third the price per ounce, and packaging built to keep HOCl stable longer.
Try IRONPUR™ Hypochlorous Acid Spray — 8 oz, $17.99, free US shipping.
Frequently Asked Questions
Does the bottle color matter for hypochlorous acid?
Yes. HOCl degrades faster when exposed to light, heat, and air. An opaque, light-blocking bottle like IRONPUR™'s helps preserve stability compared to a translucent bottle.
Where can I buy IRONPUR™ hypochlorous acid spray?
IRONPUR™ is sold direct at hypochlorousacidspray.com with free US shipping, and on Amazon.