Bronopol
Bronopol is a highly effective biocide widely used in industrial applications, particularly in water treatment, personal care products, and as a preservative in various formulations. Its chemical name is 2-bromo-2-nitropropane-1,3-diol, and it is valued for its broad-spectrum antimicrobial properties.
Bronopol Product Specifications
- Chemical Formula: C3H6BrNO4
- Molecular Weight: 199.99 g/mol
- Appearance: White to off-white crystalline powder
- Solubility: Highly soluble in water and organic solvents
- Purity: ≥98%
- Storage Conditions: Keep in a cool, dry place away from direct sunlight
Key Applications of Bronopol
| Industry | Application |
|---|---|
| Water Treatment | Controls microbial growth in cooling towers, industrial water systems |
| Personal Care | Preservative in shampoos, lotions, and other cosmetic products |
| Paints & Coatings | Prevents bacterial contamination in water-based formulations |
| Agriculture | Used in pesticide formulations as a stabilizer |
Bronopol FAQ
Q: What is the shelf life of Bronopol?
A: Bronopol typically has a shelf life of 24 months when stored properly in its original packaging at temperatures below 30°C and protected from moisture. Always check the manufacturer's expiration date for specific batches.
Q: Is Bronopol compatible with other chemicals?
A: Bronopol is generally compatible with most industrial chemicals but should not be mixed with strong reducing agents or amines as this may lead to decomposition. Always conduct compatibility tests before mixing with other components in your formulation.
Q: What safety precautions should be taken when handling Bronopol?
A: Wear appropriate PPE including gloves, goggles, and protective clothing. Avoid inhalation of dust and ensure adequate ventilation. In case of skin contact, wash immediately with plenty of water. Consult the SDS for complete safety information.
Technical Advantages of Bronopol
- Effective against both gram-positive and gram-negative bacteria
- Works at low concentrations (typically 0.01-0.1%)
- Stable over a wide pH range (3-9.5)
- Does not contribute to formaldehyde release
- Compatible with most surfactants and emulsifiers
Bronopol Regulatory Information
| Region | Regulatory Status | Maximum Allowable Concentration |
|---|---|---|
| EU | Approved for cosmetic use (Annex V) | 0.1% in leave-on products |
| USA | EPA registered biocide | Varies by application |
| China | Approved for cosmetic use | 0.1% maximum |
Bronopol FAQ
Q: How does Bronopol compare to other preservatives?
A: Bronopol offers several advantages over traditional preservatives like parabens or formaldehyde donors. It has broader spectrum activity, is effective at lower concentrations, and doesn't release formaldehyde under normal use conditions. However, product formulators should evaluate compatibility with their specific formulations.
Q: Can Bronopol be used in food contact applications?
A: No, Bronopol is not approved for direct food contact applications or as a food preservative. It is strictly for industrial and cosmetic applications where regulations permit its use.
Q: What is the recommended dosage of Bronopol?
A: The effective concentration varies by application: 0.01-0.05% for cosmetic preservation, 0.05-0.1% for industrial water treatment, and 0.1-0.5% for some specialty industrial applications. Always conduct efficacy testing for your specific use case.
Bronopol Stability Considerations
- Stable in aqueous solutions between pH 3-9.5
- Degrades at temperatures above 70°C
- Sensitive to UV light - store in opaque containers
- Should not be stored in metal containers (use plastic or glass)
Bronopol Environmental Profile
| Parameter | Value |
|---|---|
| Biodegradability | Readily biodegradable (OECD 301) |
| Aquatic Toxicity | Moderate (LC50 fish >10mg/l) |
| Bioaccumulation | Low potential |
Bronopol FAQ
Q: Does Bronopol affect product pH?
A: Bronopol itself has minimal impact on product pH when used at recommended concentrations. However, its efficacy is pH-dependent, with optimal performance between pH 4-8. Formulators should test pH effects in their specific systems.
Q: Can Bronopol cause skin irritation?
A: At recommended use concentrations (typically ≤0.1%), Bronopol is generally non-irritating. However, some individuals with sensitive skin may experience mild irritation. Always conduct patch tests for cosmetic applications.
Q: How should Bronopol solutions be prepared?
A: For best results, dissolve Bronopol in water or water-alcohol mixtures at room temperature with moderate agitation. Heating is not recommended as it may accelerate decomposition. Prepare solutions fresh when possible.