Each bottle of H2O2, either 30% or 3% has an expiration date to comply with.
  René J.

arvind  wrote:
  is there any shelf life for H2O2 so that it can be conformed before
quenching unless its too late how can we know the purity of it

*Arvind Singh Pundir*
National Brain Research Centre
Manesar, Gurgaon- Haryana- INDIA
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