BAC / BZK / Benzalkonium chloride CAS 8001-54-5 CAS 68424-85-1 C₂₁H₃₈ClN

Product Name：BAC / BZK
Other Names：Alkyl dimethyl benzyl ammonium chloride / Dodecyl dimethyl benzyl ammonium chloride / Benzalkonium chloride
CAS：8001-54-5 / CAS：68424-85-1
MF：C₂₁H₃₈ClN

Product Introduction:
Benzalkonium Chloride (BAC or BZK) is a quaternary ammonium cationic surfactant with the chemical formula [C₆H₅CH₂N(CH₃)₂R]Cl, where R represents an alkyl chain ranging from C₈ to C₁₈. It is widely used as a disinfectant, preservative, and antimicrobial agent, commonly found in medical hand sanitizers, wound cleansers, contact lens solutions, and household disinfectants. Its mechanism of action involves disrupting microbial cell membranes, causing cell content leakage and death, making it effective against bacteria, fungi, and some viruses. Benzalkonium Chloride is characterized by low toxicity, being colorless and odorless, and having good stability. However, at high concentrations, it may irritate the skin and mucous membranes. It should be diluted to recommended concentrations before use and avoided in combination with anionic surfactants to prevent reduced efficacy.

Product Applications:

1. Medical & Hygiene Field
Disinfectant: Used for surgical instruments, skin wounds, and hospital environment disinfection.

Hand Sanitizers & Alcohol-Free Disinfectant Gels: Kills bacteria and viruses on hands.

Contact Lens Solutions: Inhibits microbial growth on lenses.

Feminine & Oral Care: Acts as a preservative in certain washes and mouthwashes.

2. Household & Personal Care Products
Household Disinfectants: Wipes, sprays, and floor cleaners.

Personal Care Products: Used as a preservative in shampoos, body washes, and cosmetics (typically ≤0.1% concentration).

3. Industrial & Agricultural Uses
Water Treatment: Acts as a biocide and algaecide in cooling towers and swimming pools.

Agriculture: Used for seed disinfection and livestock farm sanitation.

Industrial Preservation: Prevents microbial contamination in coatings and textiles.