stainlessb
Member
qaStaHvIS yIn 'ej chep
Posts: 4,643
What I collect: currently focused on most of western Europe, much of which is spent on France, Belgium, Germany and Great Britain Queen Victoria
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Post by stainlessb on Oct 4, 2023 23:10:26 GMT
Since the frequency of mentioning of this has occured, I thought it might be helpful to post the following. It is from Industrialspec.com, and I S Med Specialties. What is most commonly used in the soaking of stamps is 3%.
Less than 8% concentration H2O2 is considered a non-hazardous substance. Typically encountered versions are baking soda-peroxide toothpaste (0.5%), contact lens sterilizer (2%), over- the-counter drug store Hydrogen Peroxide (3%), liquid detergent non-chlorine bleach (5%) and hair bleach (7.5%).
At 8% to 28% H2O2 is rated as a Class 1 Oxidizer. At these concentrations H2O2 is usually encountered as a swimming pool chemical used for pool shock treatments.
In the range of 28.1% to 52% concentrations, H2O2 is rated as a Class 2 Oxidizer, a Corrosive and a Class 1 Unstable (reactive) substance. At these concentrations, H2O2 is considered Industrial strength grade.
Concentrations from 52.1% to 91% are rated as Class 3 Oxidizers, Corrosive and Class 3 Unstable (reactive) substances. H2O2 at these concentrations are used for specialty chemical processes.
At concentrations above 70%, H2O2 is usually designated as high-test peroxide (HTP). Concentrations of H2O2 greater than 91% are currently used as rocket propellant. At these concentrations, H2O2 is rated as a Class 4 Oxidizer, Corrosive and a Class 3 Unstable (reactive) substance.
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