Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Sodium nitrite is an inorganic salt and will dissociates immediately into sodium and nitrite ions in water (hydrolysis definition by Harris 1990 and Sijm et al. 2007). Photodegradation was estimated using version 1.91 of the Atmospheric Oxidation Program for Microsoft Windows (AOPWIN) that estimates the rate constant for the atmospheric, gas-phase reaction between photochemically produced hydroxyl radicals and organic chemicals. The half-life (82.3 days) indicates that after evaporation or exposure to the atmosphere, the substance will be slowly degraded by photochemical processes. However, since sodium nitrite shows a very low vapour pressure evaporation is negligible; therefore, phototransformation in air is of minor importance.