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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Hydroxyethylethylenediamine-triaceticacid, ferric-sodium complex (HEDTA-FeNa) is not classified as dangerous or hazardous.

HEDTA-FeNa consists of odourless red brown microgranules.

HEDTA-FeNa does not melt before the decomposition, which starts at 203°C.

The relative density of hydroxyethylethylenediaminetriacetic acid, ferric complex, sodium salt is 1.362.

Characteristics of the PSD


51.3 µm


118 µm


208 µm

Fraction < 100 µm

37.8 % v/v

Fraction < 10 µm

1.6 % v/v

Fraction < 5 µm

0.9 % v/v

 The vapour pressure is low.
 The estimated log Kow for HEDTA-Fe(III)Na is -8.66.
 The water solubility of HEDTA-FeNa is at least 47% w/w at 30°C. 

 The self-ignition temperature of Hydroxyethylethylenediaminetriacetic acid, ferric complex, sodium salt is 272°C.

HEDTA-FeNa is non flammable, non explosive and has no oxidising properties.

 The stability and dissociation constants log K of HEDTA-FeNa are 19.7, 3.88 and 8.83.