Amazonymous—December 13, 2025✓ Verified purchase
I thought this seemed weaker than normal, leading me to test its percentage. My H2O2 concentration test strips decided to be elusive, so I did the test with the same procedural scientific rigor of a caveman. I poured some on my fingers and let it start sit for awhile. After my in depth studies, I can verify this is an adequate percentage and the same product quality you find in the bottles at salons. The Amazon-benefit is that you get great value for your money, considering the large gallon size. I used it on my pillow cases and other bedding to clean, disinfect, and remove some stains. It foamed up a little bit and did great. Read more
The Dude—March 27, 2026✓ Verified purchase
Having worked with 30% hydrogen peroxide during my internship in a neuroscience lab in college, I can confirm that this is definitely high concentration peroxide. 30% will burn you and bleach your skin and clothes nearly instantly, this is similar, but not as harsh. Absolutely use caution and PPE while working with this 12% peroxide (particularly safety glasses, if you get this in your eye, you'll end up in the ER in severe pain; possibly with permanent damage). Okay, safety precautions aside, this stuff works awesome for cleaning night guards and trays for clear braces like Invisalign. I use it at a 1:1 ratio (so, 6% peroxide) in an ultrasonic cleaner for 10 min and my trays and wife's night guard come out super clean. It's also great for spraying on mold and bacteria that grows in bathrooms. Just let it sit until it stops bubbling, rinse with water, and all clean! Just take precautions not to breathe in the spray. I wear a mask, gloves, safety glasses if I'm going to be spraying it. TL;DR: it works great for cleaning things that won't bleach (don't recommend for fabrics, unless they're white), but WEAR YOUR PPE. This stuff is very strong and not to be taken lightly. It can absolutely do damage to your skin, eyes, nose, throat, and lungs. Just be careful with it. Read more
cv3—March 9, 2026✓ Verified purchase
This stuff is strongly reactive at 12%. Don’t confuse it with lower concentrations. I have gotten good results with a diluted solution. It foams away grunge and mold. If you use it full strength, take precautions to avoid getting it on your skin or inhaling it. Due to its chemistry, it leaves no residue itself. Mold pretty much disappears. CAUTION: don’t even think about mixing it with ammonia or chlorine bleach. Read more
Cate B—March 27, 2026✓ Verified purchase
Cleans up hard to remove stains quickly & easily Read more
Sagon—November 24, 2025✓ Verified purchase
Happy with it! Read more
Princess and the Pea—January 14, 2026✓ Verified purchase
I use peroxide for all kinds of cleaning and this is saving so much money as opposed to buying the 32 oz bottles all the time. Read more
Customer—March 5, 2026✓ Verified purchase
Very good Read more
Adam B—September 16, 2025✓ Verified purchase
At 12% concentration this works great to remove pet stains from carpet, upholstery, and bedding. I use it in combination with an enzyme cleaner, and after hitting a stain with both, it looks and smells brand new again. For other cleaning applications you will probably want to dilute it, and always use gloves of course because 12% hydrogen peroxide will damage your skin. But this is very versatile stuff and worth keeping a jug in the closet for use either full-strength or diluted depending on what your needs are. Read more