Prolonging expiration dates

Once a standard is taken out of transpirational control packaging the evaporation rate will cause an increase in concentration of roughly 0.3% per year. This rate of evaporation can be reduced to around 0.1% or less by refrigeration. The expiration date is still one year.

Serving you in chemistry,
Paul R. Gaines, Ph.D.
CEO of Inorganic Ventures

DISCLAIMER: Advice offered by the chemists at Inorganic Ventures is intended for the individual posing the question.