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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 392651Generated: October 30, 2026

Formaldehyde → N-hydroxymethyl-4-chloro-3-methylpyrazole

https://huagongshe.com/reaction/392651

Reaction equation

Participants

RoleNameHCIDCharge
ReactantFormaldehydeHCID 712—
ReactantHCID 178434543HCID 178434543—
SolventMethanolHCID 887—
ProductN-hydroxymethyl-4-chloro-3-methylpyrazoleHCID 1142367095%

Reaction Steps

116 g (1.0 mol) of 4-chloro-3-methylpyrazole in 50 ml of methanol were dissolved in 100 g (1.0 mol) of formalin solution (30%) at room temperature. Water and methanol were then evaporated. The title compound remained as a white solid (yield 95%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06802882B2
Source datasetuspto-grants-2004_10
ORD IDord-9b4c413911fd4434a6bcb5c34e3088b1
Source noteuspto-grants-2004_10