Overview
Magnesium bromide (CAS 7789-48-2 ) is an inorganic salt used across pharmaceutical, food, and water treatment industries as a source of bromide ions for preservation, buffering, and chemical synthesis.
MgBr2 is the recognized shorthand buyers use when specifying this compound in technical procurement contexts. In pharmaceutical manufacturing, it serves as a reagent in Grignard-type reactions.
It also acts as a bromide ion source in active ingredient synthesis. Water treatment operations use it to generate hypobromous acid for biocidal control in cooling towers and industrial water systems.
Food and nutrition applications include its use as a pH buffer and mineral supplement carrier in functional formulations. It supports preservation systems where controlled bromide release is required.
This release helps to inhibit microbial growth in processed products. Magnesium bromide is supplied as an anhydrous powder or as the hexahydrate crystalline form for various industrial uses.
The hydrated grade is more common in commercial distribution. Pharmaceutical-grade material is available to USP and BP specifications for regulated manufacturing environments.
Technical-grade supply is standard for water treatment and industrial synthesis applications. This ensures the material meets the specific purity requirements for large-scale chemical processing.
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Physical Properties
| Melting Point | 165 °C (decomp) |
| Boiling Point | 1248.47°C (estimate) |
| Density | 3.720 g/cm³ |
| Appearance | Colorless, very deliquescent crystals; bitter taste. Soluble in water; slightly soluble in alcohol. |
| Color | off-white |
| Form | powder |
| Water Solubility | g/100g H2O: 100.6 (25°C), 125.4 (100°C); solid phase, MgBr2 ·6H2O [KRU93] |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. 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.
Trade & Regulatory
| HS Code | 28275900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 7789-48-2
- EC Number
- 232-170-9
- Mol. Weight
- 184.11
- HS Code
- 28275900
- Category
- Salts & Minerals