*Hydrogen Peroxide* `H2O2`
aka *HP, Peroxide, Oxygen Bleach*
It's a liquid oxidizer. Looks like water but it's a strong disinfectant and bleaching agent. Fizzes on cuts because it releases oxygen.
# *1. Common Grades & Strengths*
**Grade** **Strength** **Use** **Notes**
**3%** Food/Medical First aid, mouthwash, wound Brown bottle from pharmacy
**6% - 12%** Cosmetic/Hair Hair bleach, skin care "20 volume to 40 volume"
**35%** Food Grade Food processing, dilution "Technical grade". Must dilute
**50% - 70%** Industrial Textile, paper, water treatment Very dangerous. Industrial only
The % = how much `H2O2` is in water. 3% = 3ml peroxide + 97ml water
# *2. Key Uses*
1. *Disinfectant & Antiseptic*
Kills bacteria, virus, fungus. Use for wound cleaning, surface disinfecting. No residue left - breaks down