Overview
Magnesium chloride (CAS 7786-30-3 ), also sold as E511 in food applications, is an inorganic salt sourced from seawater, brine, and mineral deposits. It functions across industries as a coagulant, dust suppressant, de-icer, and mineral supplement.
In food production, E511 acts as a coagulant in tofu manufacturing and a firming agent in processed foods, where controlled magnesium ion release is critical to texture. Road maintenance and mining operations use it for dust suppression.
It is used for ice control on unpaved surfaces and haul roads, where its hygroscopic behavior keeps surfaces bound under dry conditions. In water treatment, it supports pH adjustment and serves as a magnesium source.
It is used in remineralization processes for drinking water. Pharmaceutical and agricultural formulators use the anhydrous form as a catalyst precursor in Grignard reactions and as a magnesium supplement in fertilizer blends.
It is also utilized in animal feed mineral mixes. Magnesium chloride is supplied as hexahydrate flakes, prills, or powder, and in anhydrous form for chemical synthesis applications across various industrial sectors.
Food-grade material is available to FCC specification; pharmaceutical-grade material meets USP and Ph. Eur. standards. Technical-grade flakes and liquid brine solutions are the standard commercial forms.
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Physical Properties
| Melting Point | 712 °C |
| Boiling Point | 1412 °C |
| Density | 2.32 g/cm³ |
| Appearance | white powder |
| Color | colorless |
| Odor | odorless |
| Form | powder |
| Water Solubility | 400 G/L (20 ºC) |
| Refractive Index | n20/D 1.336 |
| pH | 5.0-7.5 (25℃, 1M in H2O) |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H290 May be corrosive to metals H302 Harmful if swallowed H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P234 Keep only in original packaging. 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. 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. P390 Absorb spillage to prevent material damage. P405 Store locked up. P406 Store in a corrosion-resistant/… container with a resistant inner liner. 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 | 28273100 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 7786-30-3
- EC Number
- 232-094-6
- Mol. Weight
- 95.21
- HS Code
- 28273100
- Category
- Flame Retardants