Bronopol
Description
Bronopol (CAS 52-51-7), also known commercially as beta-Bromo-beta-nitrotrimethyleneglycol and 2-Nitro-2-bromo-1,3-propanediol, is a broad-spectrum antimicrobial active used primarily as a preservative and biocide.
It controls bacterial growth effectively at low concentrations, making it a cost-efficient option for formulators managing microbial contamination in aqueous systems across industrial and personal care applications.
In personal care and cosmetics, this chemical functions as a preservative in rinse-off and leave-on formulations including shampoos, lotions, and liquid soaps. Industrial water treatment systems rely on it to suppress bacterial populations.
It is frequently utilized in cooling towers and process water circuits to maintain system efficiency. Oilfield and metalworking operations use it to prevent microbial-induced corrosion and spoilage in drilling fluids and cutting fluid emulsions.
Pulp, paper, and textile processing also employ it to control slime-forming bacteria that degrade product quality and clog equipment. This versatility makes it a staple in heavy industrial manufacturing environments.
The product is supplied as a white to off-white crystalline powder. It is available in technical grade for industrial applications and in higher-purity grades meeting pharmaceutical and cosmetic manufacturing standards.
Packaging typically ranges from kilogram-scale bags to bulk quantities suited for large industrial procurement. Our supply chain ensures consistent quality and availability for global distribution and specialized chemical requirements.
Physical Properties
| Melting Point | 131.5 °C |
| Boiling Point | 358.0±42.0 °C(Predicted) |
| Density | 1.1 g/cm³ |
| Flash Point | 167°C |
| Appearance | off-white crystalline powder |
| Color | White to yellow |
| Odor | odorless |
| Form | Crystals or Crystalline Powder |
| Water Solubility | 25 g/100 mL (22 ºC) |
| Refractive Index | 1.6200 (estimate) |
| Log P | 1.150 (est) |
Safety & Handling (Learn More)
Trade & Regulatory
| HS Code | 29055999 |
| UN Number | 3241 |
| ADR Class | 4.1 |
| Packing Group | III |
| Storage Class | 4.1B - Flammable solid hazardous materials |
| WGK (Germany) | 2 |
Documentation
Other Names
Bronopolu|beta-Bromo-beta-nitrotrimethyleneglycol|2-Nitro-2-bromo-1,3-propanediol|2-Bromo-2-nitropropane-1,3-diol|2-Bromo-2-nitro-1,3-propanediol|Bronosol|Bronocot|Bronotak
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