Bronopol

Industrial & Cosmetic Grade Preservative — Bulk supply across India & International Markets

What is Bronopol?

Bronopol (2-Bromo-2-nitropropane-1,3-diol) is a broad-spectrum antimicrobial preservative widely used to control bacterial, and to a lesser extent fungal, growth in water-based formulations. It is a white to pale yellow crystalline solid valued for its fast-acting antimicrobial efficacy, good compatibility with a wide range of formulation ingredients, and effectiveness across a relatively broad pH range, making it a popular preservative choice particularly for personal care and cosmetic products.

Polychem Industries supplies Bronopol in cosmetic grade and industrial grade to personal care manufacturers, industrial fluid formulators, and water treatment companies across India and internationally. Its fast knockdown activity against bacteria, particularly gram-negative organisms, combined with good compatibility with common cosmetic ingredients, makes it a valuable preservative across multiple product categories.

Available Grades

GradeFormPurityStandardApplications
Cosmetic / Industrial GradeWhite to pale yellow crystalline powder99%+ (Industrial / Cosmetic Grade)Cosmetic / IndustrialCosmetics, personal care, industrial fluids, water treatment

Applications & Uses

🧴

Cosmetics & Personal Care

Widely used as a preservative in shampoos, conditioners, lotions, creams, and other water-based personal care formulations, providing effective protection against bacterial contamination during product manufacture, storage, and consumer use.

🧼

Liquid Soaps & Cleansing Products

Used in liquid hand soaps, body washes, and other cleansing product formulations as a preservative to maintain microbiological quality and product safety throughout the product shelf life.

💧

Industrial Process Fluids

Used as a preservative and antimicrobial additive in various industrial water-based fluids, including certain metalworking fluids and process water systems, helping control bacterial growth that could otherwise compromise fluid performance and stability.

🛢️

Oilfield & Drilling Fluids

Used as a biocide in certain oilfield applications, including drilling fluids and water injection systems, helping control bacterial growth that can cause fluid degradation and equipment fouling.

🎨

Paints & Coatings (In-Can Preservation)

Used as an in-can preservative in certain water-based paint and coating formulations, protecting the product from bacterial spoilage during storage prior to application.

💧

Water Treatment Systems

Used as a biocide in certain water treatment and cooling system applications requiring effective, broad-spectrum bacterial control in water-based industrial systems.

Technical Specifications

Bronopol — Key Properties

Chemical FormulaC3H6BrNO4
CAS Number52-51-7
Molecular Weight199.99 g/mol
AppearanceWhite to pale yellow crystalline powder
Purity99%+ (Industrial / Cosmetic Grade)
Melting Point130°C
Density / Bulk DensityBulk density: 0.5–0.7 g/cm3
pH4.5 – 6.0 (1% solution)
Packaging Available25 kg bags
StorageStore in cool, dry place away from direct sunlight and heat. Sensitive to alkaline conditions and elevated temperatures — keep sealed and away from strong bases.

Why Source Bronopol from Polychem Industries?

  • Cosmetic Grade and Industrial Grade available with full documentation
  • Certificate of Analysis available on request
  • Fast-acting, broad-spectrum antimicrobial efficacy
  • Reliable bulk supply for personal care and industrial fluid manufacturers
  • Competitive pricing with consistent year-round availability
  • Export documentation experience for international shipments

Frequently Asked Questions

Why is Bronopol popular as a cosmetic preservative?
Bronopol offers fast-acting, broad-spectrum antimicrobial activity, particularly strong efficacy against gram-negative bacteria which are common contamination concerns in water-based cosmetic formulations. It is effective across a relatively wide pH range and has good compatibility with most cosmetic ingredients, making it a versatile and reliable preservative choice for shampoos, lotions, and similar products.
Are there any stability considerations when using Bronopol?
Yes — Bronopol can be sensitive to alkaline conditions and elevated temperatures, which can accelerate its decomposition and potentially affect both preservative efficacy and formulation stability over time. Formulators should consider pH and processing temperature when incorporating Bronopol, and proper storage conditions should be maintained for the raw material itself.
Is Bronopol used alone or in combination with other preservatives?
Bronopol is often used in combination with other preservatives or preservative-boosting ingredients to provide broader-spectrum protection, particularly to enhance antifungal activity since Bronopol's primary strength is against bacteria. The specific preservative system design depends on the formulation type, packaging, and intended shelf life requirements.
Do you export Bronopol outside India?
Yes. We export to Bangladesh, Sri Lanka, Nepal, Bhutan, and South Africa with full export documentation. Contact us for export pricing and lead times.

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