Searching for relatively pure industrial urea
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I am looking for urea that does not require granulation using formaldehyde, namely urea with very low levels of both formaldehyde and biuret; I hope to get samples as well as information on manufacturers!
Most manufacturers’ urea products no longer contain formaldehyde, as long as the level of biuret is low.
Reply to 2# Yan Qiusheng: I’ve looked at many manufacturers of urea, and it’s very difficult to find products whose formaldehyde level is below 30 ppm; only a few manufacturers manage to achieve this. They all claim not to use formaldehyde, but tests reveal the truth. Perhaps they really do not use it, but then why is the level excessive?