DDBAC/BKC CAS 139-07-1
Sinocheme is a premier global supplier and technical manufacturer of DDBAC (Dodecyl Dimethyl Benzyl Ammonium Chloride) and Benzalkonium Chloride (BKC). Backed by a dedicated team of chemical specialists and modern production control, we deliver superior biocide solutions globally. Benzalkonium chloride, commercially recognized as dodecyl dimethyl benzyl ammonium chloride, is a foundational quaternary ammonium-based cationic surfactant that functions exceptionally as a non-oxidizing biocide and algaecide across major industrial processes.
- Broad-Spectrum Efficacy: It serves as a highly potent cationic surfactant and non-oxidizing biocide, offering exceptional bactericidal and algaecidal capabilities at minimal ppm dosages against a wide range of bacteria, algae, and fungi.
- Superior Adaptability: It features low toxicity, zero cumulative toxicity, and fast solubility in water. Its biocidal performance remains completely unaffected by water hardness variations.
- Multifunctional Performance: Beyond water treatment, it is extensively utilized in the textile printing and dyeing industries as an anti-mildew agent, premium fabric softener, antistatic agent, emulsifier, and structural conditioner.
Dodecyl Dimethyl Benzyl Ammonium Chloride Description
Name: Dodecyl Dimethyl Benzyl Ammonium Chloride(DDBAC)
Molecular Formula: C21H38NCl
Molecular weight: 340.0
CAS NO.: 139-07-1
Density: N/A
Boiling point: N/A
Melting point: ~60 °C
Flashing point: N/A
Appearance: Colorless to pale yellow transparent liquid / Pale yellow wax.
Solubility: Highly soluble in water, easily soluble in ethanol.
Core Properties & Application Dynamics: DDBAC/BKC penetrates microbial cell walls via its strong cationic surfactant properties, disrupting cell membranes and inducing metabolic termination. It is widely relied upon as an advanced disinfectant across Hospital, Livestock, and Personal Hygiene sectors. Dual biocidal and detergency mechanisms ensure extreme lethality against enveloped viruses, bacteria, and algae. It provides superb dispersing and penetrating kinetics, working effectively under variable water hardness without leaving toxic chemical build-ups.
Industrial Usage & Dosing Protocol: For standard non-oxidizing biocidal recirculation systems, a dosage of 50–100 mg/L is highly recommended. To eliminate established bio-sludge and thick biological slime, a dynamic shock dose of 200–300 mg/L is preferred. To maximize synergistic performance and clear foam, an adequate organosilyl antifoaming agent should be introduced during the initial charging cycle. DDBAC/BKC exhibits excellent synergy when co-applied with other non-oxidizing biocides such as isothiazolinones, glutaraldehyde, and dithionitrile methane, but must never be mixed directly with chlorophenols or anionic surfactants. If extensive bio-sludge detaches into the circulating cooling water, prompt mechanical filtration or systematic blowdown is necessary to clear debris before foam dissipation.
Storage, Packaging & Handling: Compliant with the rigid HG2230-91 standard, our product is supplied in heavy-duty plastic drums or customized internal plastic spray drum packaging. Storage areas must remain perfectly ventilated, cool, and shielded from direct sunlight and moisture. In terms of safety, the material features a mild almond odor and demonstrates no acute primary skin irritation. In case of accidental contact, immediately flush the affected area with copious amounts of fresh water.
DDBAC/BKC Technical
As a certified DDBAC & Dodecyl Dimethyl Benzyl Ammonium Chloride factory, we adhere to strict quality protocols, with every batch undergoing rigorous testing to ensure consistent efficacy and safety.
| Items | Index | |
| Appearance | Colorless to yellowish transparent liquid | Yellowish transparent liquid |
| Active content ％ | 48-52 | 78-82 |
| Amine salt % | 1.0 max | 1.0 max |
| pH | 6.0~8.0(as it) | 6.0-8.0(1% water solution) |
Benzododecinium Chloride Applications
- Pulp and Paper Applications: It is highly effective in controlling the growth of slime-forming bacteria and anaerobic microflora during the paper and paperboard production process. It protects white water systems, paper mill process water, pulp storage chests, starch solutions, and pigment slurries from microbial odor and degradation during long-term storage.
- Cooling Tower Systems: Utilized as a frontline water treatment biocide to completely inhibit the growth of algae, green scum, and complex biological slime matrices in industrial recirculating cooling towers and evaporative condensers. It performs efficiently under highly turbulent water flow, ensuring rapid and uniform biocide distribution across the entire pipe network.
- Oilfield Applications & Wet-Well Injection: Effectively prevents deep downhole microbial contamination and the severe biogenic souring of fracturing fluids caused by Sulfate-Reducing Bacteria (SRB) and acid-producing bacteria. It protects enhanced oil recovery (EOR) fluids, well squeezes, drilling muds, and well completion fluids from premature gel breakdown, usually introduced via regular automated shock dosing.
Frequently Asked Questions (FAQ)
Q1: Can DDBAC/BKC be used in combination with anionic surfactants or common laundry detergents?
A1: No. Since DDBAC/BKC is a strongly cationic surfactant, mixing it with anionic compounds (such as sodium lauryl sulfate – SLS) will cause immediate charge neutralization. This creates an inactive precipitate, resulting in a total loss of both its biocidal efficacy and detergency properties.
Q2: Does water hardness affect the biocidal performance of Benzalkonium Chloride?
A2: Not at all. Unlike many alternative biocides, DDBAC/BKC exhibits excellent stability and chemical tolerance under variable water hardness conditions. This makes it highly dependable for harsh, high-mineral cooling water systems and hard-water oilfield brine environments.
Q3: Why is a high shock dose of 200–300 mg/L required specifically for bio-sludge removal?
A3: While maintenance dosages (50–100 mg/L) are sufficient to kill free-floating planktonic bacteria, an established bio-slime or biofilm matrix is protected by a thick extracellular polymeric substance (EPS) layer. A high-concentration shock dose is necessary to fully penetrate this matrix, detach the biological slime from the pipe surfaces, and allow it to be flushed out.
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