Cetylpyridinium Bromide (CAS 140-72-7) is a compound of significant interest across several industries due to its distinct chemical properties. As a quaternary ammonium compound, it functions primarily as a cationic surfactant and a broad-spectrum antimicrobial agent. Understanding its chemical structure, behavior, and how to procure it efficiently from global suppliers, particularly those in China, is vital for B2B stakeholders.

Chemical Structure and Properties

Cetylpyridinium Bromide (CPB) has the molecular formula C21H38BrN. Its structure features a long hydrophobic hydrocarbon chain (cetyl or hexadecyl group) attached to a positively charged pyridinium ring, with bromide as the counter-ion. This amphiphilic nature—possessing both hydrophilic (charged head) and hydrophobic (long chain) parts—is the basis for its surfactant activity. It readily dissociates in water, yielding a positively charged pyridinium cation and a bromide anion.

The positively charged head group allows CPB to interact with negatively charged surfaces, including those of microbial cell membranes. This interaction disrupts the membrane's integrity, leading to cell death, which explains its potent bactericidal and bacteriostatic action against a wide range of microorganisms.

In terms of physical characteristics, CPB is typically supplied as a white or slightly yellow crystalline solid, with high purity (often ≥98%) being a standard requirement for most commercial applications. Its stability under normal conditions, coupled with its functional attributes, makes it a preferred ingredient in many formulations.

Applications Driven by its Chemistry

The dual functionality of Cetylpyridinium Bromide as a surfactant and antimicrobial drives its use in:

  • Personal Care: As an active ingredient in mouthwashes and antiseptic products for its oral hygiene benefits.
  • Industrial Biocides: In water treatment, paints, and coatings to prevent microbial spoilage and biofilm formation.
  • Emulsification: Stabilizing mixtures in various industrial formulations.

Sourcing Cetylpyridinium Bromide from Chinese Manufacturers

When seeking to buy Cetylpyridinium Bromide, especially in bulk, China represents a significant source. Buyers should prioritize suppliers who can guarantee high purity (≥98%) and provide comprehensive technical documentation, including SDS and COA. A reputable Cetylpyridinium Bromide supplier will also be transparent about their quality control processes and certifications. Competitive Cetylpyridinium Bromide pricing is often available from Chinese manufacturers, but it is essential to balance cost with quality assurance and supply chain reliability. When you search for a manufacturer, look for companies with a strong export history and clear communication channels for product inquiries and purchase orders.