Overview
Zinc bromide (CAS 7699-45-8 ), commonly abbreviated as ZnBr2, is an inorganic salt sourced for its utility as a catalyst, electrolyte component, and high-density completion fluid across industrial and specialty chemical markets.
Buyers in pharmaceuticals, oil field services, and specialty synthesis recognize it as a distinct procurement item from other zinc halides. In oil and gas well completion, ZnBr2 solutions are formulated into high-density clear brine fluids.
These fluids are used to control wellbore pressure without solids. Pharmaceutical manufacturers use it as a precursor or reagent in active ingredient synthesis where a soluble zinc salt is required for specific chemical reactions.
In organic synthesis and catalysis, it acts as a Lewis acid catalyst for Friedel-Crafts reactions and other electrophilic processes. Personal care and biocide formulators also incorporate it for preservation and surface-active functions.
These functions are essential in specific antimicrobial formulations. Zinc bromide is supplied as a white crystalline powder or as concentrated aqueous solution, with solution concentrations typically ranging to meet oilfield brine density specifications.
Standard grades include technical and pharmaceutical-grade material, with the latter conforming to USP or BP specifications. Packaging options range from laboratory quantities to bulk industrial supply depending on the application grade.
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Physical Properties
| Melting Point | 394 °C |
| Boiling Point | 697 °C |
| Density | 4.3 g/cm³ |
| Flash Point | 650°C |
| Appearance | Zinc bromide is an odorless white crystalline solid. |
| Color | White to pale cream |
| Form | beads |
| Water Solubility | soluble, 447 g/100 mL (20 ºC) |
| Refractive Index | 1.5452 |
| pH | 4 (H2O, 20℃)(saturated solution) |
Safety & Handling
Danger GHS05 GHS07 GHS09 Hazard Statements H302 Harmful if swallowed H314 Causes severe skin burns and eye damage H317 May cause an allergic skin reaction H318 Causes serious eye damage H400 Very toxic to aquatic life H411 Toxic to aquatic life with long lasting effects Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. 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. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. 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. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. 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 | 28275900 |
| UN Number | 3260 |
| ADR Class | 8 |
| Packing Group | III |
| Storage Class | 8B - Non-combustible corrosive hazardous materials |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 7699-45-8
- EC Number
- 231-718-4
- Mol. Weight
- 225.2
- HS Code
- 28275900
- Category
- Pigments & Colorants