Chelating Agents
REACH
Trisodium HEDTA
CAS Number
139-89-9
EC Number
205-381-9
Abbreviation
HEDTA
What is Trisodium HEDTA?
Trisodium HEDTA (CAS 139-89-9), also known as HEDTA, is a water-soluble chelating agent that binds and sequesters metal ions.
Where is Trisodium HEDTA used?
- Water treatment: scale control
- Personal care: deactivates trace metals in shampoos, conditioners and skin cleansers
- Textile and paper processing: applied during bleaching and dyeing where metal contamination occurs
- Agriculture: micronutrient carrier chelating iron and manganese into plant-available forms
- It forms stable complexes with calcium, magnesium, iron and heavy metals, preventing mineral interference in formulations and process streams.
Good to know: Specifications vary by application sector; buyers sourcing for personal care should confirm grade suitability with the supplier.
Commercial specifications
- Aqueous solution, 40% concentration most common commercial form
Other Names (Synonyms)
Hydroxyethylethylenediaminetriacetic acid|Trisodium salt of hedta|2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid|HEDTA
What are the physical properties of Trisodium HEDTA?
Melting Point 288 °C (decomp)
Density 1.285 g/cm³
Color White to Almost white
Form powder to crystal
Water Solubility 480g/L at 20℃
Vapor Pressure 0Pa at 20℃
Log P -11.35
How is Trisodium HEDTA classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H302 Harmful if swallowed
H315 Causes skin irritation
H318 Causes serious eye damage
H319 Causes serious eye irritation
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
Which trade and regulatory codes apply to Trisodium HEDTA?
HS Code 2922.50.5000
Storage Class 11 - Combustible Solids
WGK (Germany) 2