Benzyldimethylhexadecylammonium chloride
Benzalkonium chloride (CAS: 122-18-9; Formula: CH3(CH2)15N(Cl)(CH3)2CH2C6H5) is a quaternary ammonium compound known for its cationic surfactant properties. Supplied by Tech Serve Solutions as a technical or research grade material with an assay of ≥97.0% (dried material, AT) and ≤9% water content, it functions primarily as a disinfectant, antiseptic, and phase transfer catalyst. Its amphipathic structure allows it to interact with cell membranes, underpinning its antimicrobial efficacy.
- IUPAC
- 16-BAC,Benzylhexadecyldimethylammonium chloride,Cetalkonium chloride,Cetyldimethylbenzylammonium chloride
- Synonyms
- Benzalkonium chlorideCetalkonium chlorideCetyldimethylbenzylammonium chloride16-BAC

Disinfectant and Antiseptic
Due to its antimicrobial properties, Benzalkonium chloride is a common active ingredient in disinfectants, sanitizers, and antiseptic wipes. It effectively disrupts microbial cell membranes, leading to cell death.
Phase Transfer Catalyst
As a quaternary ammonium salt, it can act as a phase transfer catalyst in organic synthesis. It facilitates the reaction between reactants located in different immiscible phases by transferring one reactant across the phase boundary.
Cationic Detergent
Its surfactant nature makes it useful as a cationic detergent in various cleaning and sanitizing formulations, particularly where antimicrobial action is also desired.
Preservative
It is employed as a preservative in certain pharmaceutical and cosmetic preparations to prevent microbial contamination and extend shelf life.
| Molecular weight | 396.09 |
|---|---|
| Linear formula | CH3(CH2)15N(Cl)(CH3)2CH2C6H5 |
| Assay | ≥97.0% (dried material, AT) |
| Storage temperature | 2-8°C |
| Impurities tested | ≤9% water |
| Melting point | 55-65 °C(lit.) |



Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H314Causes severe skin burns and eye damage
- H400Very toxic to aquatic life
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8/PG 3 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | C,N |
| Risk statements (R) | 21/22-34-50 |
| Safety statements (S) | 26-36/37/39-45-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Description | cationic |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What are the primary uses for Benzalkonium chloride (CAS 122-18-9)?
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Benzalkonium chloride (CAS 122-18-9) is primarily used as a disinfectant, antiseptic, cationic detergent, and phase transfer catalyst. It is also employed as a preservative in some formulations.
What is the CAS number and chemical formula for Benzalkonium chloride?
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The CAS number for Benzalkonium chloride is 122-18-9 and its linear formula is CH3(CH2)15N(Cl)(CH3)2CH2C6H5.
What grade and purity does Tech Serve Solutions supply for Benzalkonium chloride?
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Tech Serve Solutions supplies Benzalkonium chloride with an assay of ≥97.0% (dried material, AT) and ≤9% water content. This is typically considered a technical or research grade; TSS does not represent this product as USP, BP, or EP grade unless explicitly stated otherwise.
How should Benzalkonium chloride be handled safely?
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Benzalkonium chloride is a dangerous substance requiring careful handling. It causes severe skin burns and eye damage (H314) and is harmful if swallowed or in contact with skin (H302, H312). It is also very toxic to aquatic life (H400). Always use appropriate personal protective equipment, including eyeshields, face shields, gloves, and respiratory protection, and consult the Safety Data Sheet before use. Store at 2-8°C.
How is Benzalkonium chloride packed, shipped, and exported by TSS?
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Tech Serve Solutions packs, ships, and exports Benzalkonium chloride in compliance with relevant transportation regulations (UN 3261, Hazard Class 8, Packing Group III). Specific packaging details are available upon request.
How can I request a sample or quote for Benzalkonium chloride?
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To request a sample or quote for Benzalkonium chloride, please contact our sales department via the website or provide your details through the product inquiry form.
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