Formaldehyde → Glyoxylic Acid

Participants

Reaction Conditions

Reaction Steps

29.3 g (0.100 mole) of 4-diazodiphenylamine hydrogensulfate was dissolved in 70 ml of an 85% phosphoric acid solution. Then 4.74 g (0.0500 mole) of glyoxylic acid monohydrate (97%) was added to this solution and the mixture was stirred at 40° C. for 20 hours. Then 1.58 g (0.0500 mole) of paraformaldehyde (95% ) was added to the reaction mixture and the mixture was stirred at 40° C. for additional 20 hours. Thereafter, the reaction solution was poured into 800 ml of isopropyl alcohol while stirring, to form yellow precipitate. The yellow precipitate was obtaided by filtering and washed with isopropyl alcohol, to give dihydrogenphosphate of a condensate of 4-diazodiphenylamine with glyoxylic acid.formaldehyde.

Provenance & Evidence