Sodium nitromalonaldehyde monohydrate

SODIUM NITROMALONALDEHYDE MONOHYDRATE (Malonaldehyde, nitro-, sodium derivative)... 

The slightly moist cake of crude product is transferred to a 1-1. flask and heated to boiling with a mixture of 400 ml. of 95% ethanol and 100 ml. of water. The hot solution is filtered to remove a fine yellow solid, and the clear red filtrate is cooled to 0-5°. The recrystallized product is collected on a Buchner funnel and dried in air at rpom temperature. The yield is 57-65 g. (36-41%) of pink or tan needles of sodium nitromalonaldehyde monohydrate (Note 3). 

Sodium iodide, 30, 11 Sodium methoxide, 32, 32 Sodium nitrite, 31, 14 32, 95 Sodium nitromalonaldehyde monohydrate, 32, 95 Sodium phenoxide, 32, 75 Sodium sulfhydrate, 31, 7 Sodium sulfide nonahydrate, 31, 6 Sorbic acid, 5-hydroxy-/3-methyl, 5-lactone, 32, 57... 

It has been reported (Bruno Camerino, private communication) that, during the preparation of sodium nitromalonaldehyde monohydrate on a pilot-plant scale, two operators were so affected by the fumes evolved during the preparation that their immediate hospitalisation was necessary. It was determined subsequently that hydrogen cyanide, up to approximately 1 g./kg. of muco-bromic acid utilised, was formed in the reaction mixture. It is essential that precautions specified in Note 1 of the procedure be followed carefully. 

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