Overview
Hydroxyethylethylenediaminetriacetic acid (CAS 150-39-0 ), commonly known as HEDTA, is a chelating agent used across industrial and personal care applications. It binds and sequesters metal ions, particularly calcium, magnesium, iron, and heavy metals.
By sequestering these ions, it prevents them from interfering with formulation performance or process chemistry. In personal care formulations, HEDTA stabilizes products by deactivating trace metal ions that would otherwise degrade active ingredients.
This stabilization prevents discoloration and maintains the integrity of the final product. Water treatment operations use it to control scale formation and metal ion interference in process water and cooling systems.
Textile and paper processing rely on HEDTA to sequester hardness ions during bleaching and dyeing. This process improves consistency and reduces chemical waste across large-scale manufacturing operations.
In cleaning formulations, it enhances detergent performance by keeping calcium and magnesium ions from reducing surfactant efficiency. This ensures that cleaning agents remain effective even in hard water conditions.
HEDTA is supplied primarily as an aqueous solution, with concentration levels varying by grade and supplier specification. Technical grade is the standard offering for industrial applications including water treatment.
Personal care applications may require grades meeting cosmetic or purity specifications aligned with industry standards. These high-purity options ensure compatibility with sensitive skin and hair care formulations.
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Physical Properties
| Melting Point | 159 °C |
| Boiling Point | 421.08°C (rough estimate) |
| Density | 1.3300 (rough estimate) |
| Appearance | Crystalline |
| Color | White to Almost white |
| Form | powder to crystal |
| Water Solubility | soluble |
| Vapor Pressure | 0.01Pa at 20℃ |
| Refractive Index | 1.4550 (estimate) |
| Log P | -4.65 at 20℃ |
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 | 29224999 |
| Storage Class | 11 - Combustible Solids |
Other Names
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Chemical Properties
- CAS Number
- 150-39-0
- EC Number
- 205-759-3
- Mol. Weight
- 278.26
- HS Code
- 29224999
- Category
- Chelating Agents