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CAS Number 61789-71-7
Coco alkyl dimethyl benzyl ammonium chloride is a quarternary ammonium compound for the manufacture of disinfectants.
Composition of Coco alkyl dimethyl benzyl ammonium chloride:
Cocos alkyl dimethyl benzyl ammonium chloride
Other name:
Dodigen 226
Product properties of Coco alkyl dimethyl benzyl ammonium chloride:
Active substance content:
about 50%:
Mean equivalent we ight of active ingredient:
364 g/mol
Free amine and amine hydrochoride:
max. 1,0%
Water content:
about 50%
Appearance at 20°C:
yellowish liquid
Density at 20°C (DIN 51757):
about 0,98 g/cm³
pH of 1 % aqueous solution:
6 - 7
Solubility at 20 °C:
soluble in water, alcohols and ketones
Substance Type:
Chemical Substance
Systematic Name:
Quaternary ammonium compounds, benzylcoco alkyldimethyl, chlorides
CAS Number:
61789-71-7
EPA Registry Name:
Coco alkyldimethylbenzyl ammonium chlorides
Compatibility of Coco alkyl dimethyl benzyl ammonium chloride:
Coco alkyl dimethyl benzyl ammonium chloride can be combined with the following builder substances:
- Sodium sulphate
- Sodium carbonate
- Sodium acetate
- Sodium metasilicate * 9 H2O
- Sodium orthophosphates
- Sodium pyrophosphates
- Sodium tetraborate (borax)
- Hydroxymethyl- and methyl cellulose
- Urea
Precipitation, sometimes caused by one of the constituents of hard water in the presence of Coco alkyl dimethyl benzyl ammonium chloride, can often be prevented by the addition of small amounts of Genapol UD-079.
Coco alkyl dimethyl benzyl ammonium chloride can be used over almost the entire pH-range.
Coco alkyl dimethyl benzyl ammonium chloride is compatible with nonionic and cationic detergents and wetting agents such as nonylphenol ethoxylates, triisobutylphenol ethoxylates and alkyl ethoxylates.
As cationic compound Coco alkyl dimethyl benzyl ammonium chloride is deactivated by highly condensed polyphosphates, strongly dehydrated metasilicates, alkali chromates and anionic detergents, e.g. soap, alkylbenzene sulphonates and fatty alcohol sulphates.
Coco alkyl dimethyl benzyl ammonium chloride should not come into contact with strong oxidizing agents such as hypochlorite, nitric acid or perchlorates.
Coco alkyl dimethyl benzyl ammonium chloride (also known as alkyl dimethyl benzyl ammonium chloride [ADBAC]) is a component in a water treatment product (Champion Bactron SK-4465) used to provide corrosion resistance from microbial influenced corrosion in the steel flowlines and spinelines throughout the produced water management collection system.
Surface Activity of Coco alkyl dimethyl benzyl ammonium chloride:
Aqueous solutions of Coco alkyl dimethyl benzyl ammonium chloride reduce the surface tension of water as follows:
0,02% Dodigen 226 37 mN/m
0,1% Dodigen 226 34 mN/m
According to DIN 53 901 5,8 g/l Coco alkyl dimethyl benzyl ammonium chloride give a wetting time of 100 seconds.
The wetting effect can be considerably improved by combining Coco alkyl dimethyl benzyl ammonium chloride with Genapol UD-079 in equal quantities.
The cleaning action of Coco alkyl dimethyl benzyl ammonium chloride is only very weak in the small amounts required for disinfecting.
Nonionic detergents and wetting agents should therefore be added to disinfectant cleaner formulations.
Coco alkyl dimethyl benzyl ammonium chloride foams strongly.
Foaming can be inhibited by adding small amount of Antimussol FN.
Microbiological Effectiveness
Quarternary ammonium salts of the Coco alkyl dimethyl benzyl ammonium chloride type have unusually high bactericidal activity against gram positive bacteria; gram-negative microorganisms are also destroyed by Coco alkyl dimethyl benzyl ammonium chloride in considerably diluted form.
The bactericidal activity against gram-negative bacteria (e.g. E. coli, Ps. aeruginosa) can be considerably increased by adding coconut fatty amine salts to Coco alkyl dimethyl benzyl ammonium chloride, approximately in the ratio 1 : 3.
Algicidal activity (after 14 days): < 3,9 mg/l
Growth can be inhibited by considerably lower concentrations.
For example, Coco alkyl dimethyl benzyl ammonium chloride has a bacteriostatic effect on Staph. aureus even at concentrations of 10 mg/l.
A deodorant effect is achieved simply by inhibiting microbial growth which in turn prevents the formation of malodorous metabolic products.
Coco alkyl dimethyl benzyl ammonium chloride is also capable of absorbing some odour - forming substances.
The microbiological effectiveness of Coco alkyl dimethyl benzyl ammonium chloride is influenced by several other factors.
It is enhanced by increasing the temperature and pH and longer periods of exposure and may be reduced to some extent by very hard water.
However, the effect of hard water can be counteracted by the addition of sequestring agents.
The effectiveness of any disinfectant is impaired if the objects to be disinfected are severely soiled.
Wherever possible such objects should first be cleaned with detergents or cleaners based on Genapol UD-079.
Protein stains on textiles are best removed by an enzymatic detergent.
In the case of serious disinfection problems (in the presence of small amounts of deactivators), a minimum concentration of 0,1% Coco alkyl dimethyl benzyl ammonium chloride is recommended.
The minimum bactericidal concentrations determined with pure Coco alkyl dimethyl benzyl ammonium chloride solutions cannot always be applied to disinfectant cleaner formulated with several constituents.
Toxicity of Coco alkyl dimethyl benzyl ammonium chloride:
Quarternary ammonium salts are labeled as non-irritant on skin in the usual application concentrations of 0,2 – 1 g/l active substance.
The acute lethal dose LD50, determined with rats, is about 1000 mg/kg body weight.
It is advisable to rinse equipment used in the food industry with water after disinfecting with Coco alkyl dimethyl benzyl ammonium chloride.
It is not permissible to add Coco alkyl dimethyl benzyl ammonium chloride to foodstuffs.
Manufacture of Disinfectants
A powder or flake preparation with up to 30% active ingredient but containing no other detergents or builders can be obtained by mixing equal quantities of Dodigen 226 and urea in a mixer or on a roller mill.
The water content of Dodigen 226 partially evaporates during grinding or must be removed, if necessary, by a drying process.
Disinfectant cleaners in powder form of Coco alkyl dimethyl benzyl ammonium chloride:
Preparation which contain detergents and builders in addition to Coco alkyl dimethyl benzyl ammonium chloride can be prepared with sodium tripolyphosphate / sodium pyrophosphate according to the following guide formulation:
5–10% Coco alkyl dimethyl benzyl ammonium chloride
5% nonionic surfactant
10% water
30% sodium tripolyphosphate or sodium pyrophosphate
The above products are pasted together and harden within 10 to 20 hours.
Coco alkyl dimethyl benzyl ammonium chloride can be mixed with further builder substances or extenders.
Liquid products of Coco alkyl dimethyl benzyl ammonium chloride:
The following guide formulation give a liquid disinfectant cleaner:
1-20% Coco alkyl dimethyl benzyl ammonium chloride
1-20% nonionic surfactant, small amounts of alkalis, perfume components, complexing agents,remainder water
Paste preparations
By using more than 30% nonionic detergents the formulation gives a pasty product:
5-10 % Coco alkyl dimethyl benzyl ammonium chloride
30-40 % Genapol OA-080
small amounts of other additives remainder water
Packaging of disinfectant cleaners of Coco alkyl dimethyl benzyl ammonium chloride:
Dilute aqueous solutions of Coco alkyl dimethyl benzyl ammonium chloride are no more corrosive towards metals than is water with the same pH.
However the liquid products should be packed in polyethylene containers to prevent contamination by rust.
Synonyms:
Quaternary ammonium compounds, benzylcoco alkyldimethyl, chlorides
Cocoalkyldimethylbenzylammoniumchloride
C8-18ALKYLDIMETHYLBENZYLAMMONIUMCHLORIDE
ALKYL(C8-C18)DIMETHYLBENZYLAMMONIUMCHLORIDE
Quaternare Ammoniumverbindungen, Benzyl-kokos-alkyldimethyl-
