2-Chloro-N-(hydroxymethyl)acetamide (N-methylolchloracetamide) is a N-hydroxymethyl derivative of chloroacetamide. One of the method reported for its synthesis is by the reaction of 2-chloracetamide with formaldehyde. It has been reported to be a formaldehyde releaser and an infrequent sensitizer to formaldehyde contact allergy. Influence of short and prolonged exposure of 2-chloro-N-(hydroxymethyl)acetamide (as formaldehyde donor/releaser) on lymph node responses has been investigated. It has high biocide action and is utilized as preservative.