Hydrogen Peroxide (H2O2) Solution Properties
Hydrogen Peroxide (H2O2) solutions are clear, colorless, water-like in appearance, and can be mixed with water in any proportion. At high concentrations, it has a slightly pungent or acidic odor.
H2O2 has a molecular weight of 34.02 and is nonflammable at any concentration. Its Chemical Abstracts Service Registry Number is 7722-84-1.
Standard H2O2 Industrial Strengths
| H2O2 Concentration | 35% | 50% |
|---|
| Active oxygen content, wt.% | 16.5 | 23.5 |
| Density @ 68°: |
| Specific gravity | 1.132 | 1.196 |
| lbs per gallon | 9.45 | 9.98 |
| gms-100% per mL | 0.397 | 0.598 |
| Apparent pH | 2-3 | 1-2 |
| Acidity, mg/L (as H2SO4) | < 50 | < 50 |
| Total heavy metals, mg/L | < 1 | < 1 |
| Freezing point, ° | -27 | -62 |
| Boiling point, ° | 226 | 237 |
| Vapor pressure @ 86°, mm Hg | 23 | 18 |
| Viscosity: |
| @ 32°, cp | 1.81 | 1.87 |
| @ 68°, cp | 1.11 | 1.17 |
| Heat of decomposition, cal/gm | 233 | 335 |
| Mole fraction | 0.22 | 0.346 |