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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2296068Generated: October 25, 2026

Hydrochloric Acid → Dianisidine

https://huagongshe.com/reaction/2296068

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactanto-Dianisidine dihydrochlorideHCID 62311—
ReactantSodium NitriteHCID 23668193—
ProductDianisidineHCID 8411—

Reaction Conditions

Temperature4 °C

Reaction Steps

A solution of 0.36 g of o-dianisidine dihydrochloride (1 mmole) in 45 ml (0.2 M HCl was cooled in an ice bath. To this was added dropwise (to keep the temperature below 5° C.) a solution of 0.17 g of sodium nitrite (2.46 mmole) in 5 ml distilled water. An orange color formed immediately. The mixture was stirred for another 30 minutes at 4° C. before using.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04427783
Source datasetuspto-grants-1984_01
ORD IDord-b942f377e64f45088d6813be0fb70cba
Source noteuspto-grants-1984_01