Overview
Trisodium HEDTA (CAS 139-89-9 ), also known by the abbreviation HEDTA, is a water-soluble chelating agent used to bind and sequester metal ions across a range of industrial processes.
By forming stable complexes with calcium, magnesium, iron, and heavy metals, it prevents unwanted mineral interference in formulations and process streams. In water treatment, HEDTA controls scale formation.
It keeps metal ions in solution, protecting equipment and extending system life. Personal care formulators use it to deactivate trace metals in shampoos, conditioners, and skin cleansers.
These trace metals would otherwise destabilize active ingredients or cause discoloration. Textile and paper processors apply it during bleaching and dyeing operations where metal contamination occurs.
Metal contamination reduces process efficiency and damages fabric quality. In agriculture, it functions as a micronutrient carrier, chelating iron and manganese into plant-available forms.
These forms are ideal for foliar sprays and fertigation solutions. Trisodium HEDTA is supplied as an aqueous solution, with 40% concentration being the most common commercial form.
Technical grade is the standard offering across industrial markets. Specifications vary by application sector, and buyers sourcing for personal care should confirm grade suitability with the supplier.
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Physical Properties
| 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 |
Safety & Handling
Danger GHS05 GHS07 GHS09 Hazard Statements H302 Harmful if swallowed H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects 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. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 2922.50.5000 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 139-89-9
- EC Number
- 205-381-9
- Mol. Weight
- 278.26
- HS Code
- 2922.50.5000
- Category
- Chelating Agents