Overview
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.
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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
Danger GHS05 GHS07 GHS09 GHS06 GHS02 GHS08 Hazard Statements H228 Flammable solid H301 Toxic if swallowed H302 Harmful if swallowed H310 Fatal in contact with skin H312 Harmful in contact with skin H315 Causes skin irritation H318 Causes serious eye damage H330 Fatal if inhaled H331 Toxic if inhaled H335 May cause respiratory irritation H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects H411 Toxic to aquatic life with long lasting effects H302+H312 Harmful if swallowed or in contact with skin Precautionary Statements P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. 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. P284 In case of inadequate ventilation wear respiratory protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P320 Specific treatment is urgent (see … on this label). 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+P316 Get emergency medical help immediately. 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. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P370+P378 Use … for extinction. P403+P233 Store in a well-ventilated place. Keep container tightly closed. 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 | 29055999 |
| UN Number | 3241 |
| ADR Class | 4.1 |
| Packing Group | III |
| Storage Class | 4.1B - Flammable solid hazardous materials |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 52-51-7
- EC Number
- 200-143-0
- Mol. Weight
- 199.99
- HS Code
- 29055999
- Category
- Alcohols & Glycols