Zero-temperature storage for formaldehyde
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A colleague said that by adding a certain amount of methanol to the formaldehyde solution, it can be stored at zero degrees. Is it possible?
Could Cangban give some guidance? Those who happen to be passing by, please leave a message too.
It’s possible to do that, but the amount of methanol added must be at least 8%; in other words, the methanol content in the 37% formaldehyde solution should be between 9% and 10%. Otherwise, polymerization will occur even when stored at zero degrees. In fact, you can add a small amount of formaldehyde polymerization inhibitor; a concentration of 30–40 ppm is sufficient to allow storage at zero degrees safely. Contact me if you have any questions.