18238 BASF Odour Control
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Specialty Chemicals by BASF BASF Biocides Odour Control and Chemical Sanitation PAGE 2 BASF Biocides - protecting the world The biocide business for Specialty Chemicals, BASF AG BASF is one of the world’s leading suppliers of How we work for you specialty biocides. We create products that make life safer, simpler and more comfortable for BASF’s biocides are sold through BASF’s millions of people worldwide. established network of sales offices worldwide. In this way, we aim to offer valuable local support Our high performance biocides are used in every and the highest standards of customer excellence. aspect of life. From toiletries, to air conditioners used in both industry and home, from Iceland to Working with BASF provides access to many Equador our technology spans the globe in essential regulatory approvals. For example our preservation and disinfection. We help to protect EPA registrations allow products and customer the lives of millions of people across the world formulations to be sold in the USA and our every day. approvals ensure supply to the paper industry in the Nordic area. We are also well positioned to Through our product range, marketing expertise, support our actives under the European Biocidal technical and regulatory knowledge, BASF’s Products Directive. innovative biocides approach positions the business at the very forefront of antimicrobial We believe in long-term commitment to our technology. The marketing, technical and research products and customers and this is reflected in and development headquarters for BASF’s our substantial registrations and the data required specialty biocide business is located in to obtain them. To this end many of our products Nottingham. are supported with extensive safety and environmental data packages. Our products are made in ‘state of the art’ manufacturing facilities at Cramlington, England In addition, BASF is committed to providing the and Ludwigshafen, Germany. In each of our highest standard of health, safety and plants, the expert integration of process and environmental protection as part of our energy requirements leads to manufacturing commitment to Responsible Care. We continually efficiencies and quality production. research and innovate to produce the most advanced products on the market. To demonstrate our commitment to our customers, we have made significant investment in long term At BASF, we are also constantly reviewing ways in dedicated biocide resources within Europe, Asia which we can improve our products and services Pacific and the USA. to ensure that we keep pace with the rapidly changing developments in information technology. In 2000, we established a direct presence in the BASF is harnessing these changes and ensuring USA with a new dedicated marketing and that we are aligned with our customer’s technical centre based at BASF Corporation requirements, making it more efficient and headquarters in Mount Olive, New Jersey. Product convenient for you to do business with us. is supplied through an integrated BASF warehousing facility in Charlotte, North Carolina. BASF’s specialty biocide products are marketed Our US operation is part of BASF Corporation’s under the Myacide® and Protectol® trade names. Chemical Division, situated in Mount Olive, New Jersey. PAGE 3 PAGE 4 Introduction In many industrial applications, the problems The use of sumps or lagoons as waste settlement associated with microbial contamination manifest areas in some manufacturing industries can also themselves as biofilm formation or as product give rise to odour problems due in part to spoilage and degradation. However, in some microbial activity. In some instances, potentially other sectors, the ability of microorganisms to toxic gases may be generated under anaerobic generate noxious or unpleasant odours can be an conditions and this can present a significant equally negative consequence of their presence. safety hazard. These specific occurrences may be rare but they can be controlled by appropriate use Every aspect of life, from travel to leisure activities, of antimicrobials that have broad-spectrum places demands for increasing levels of comfort antibacterial activity, including activity against and hygiene. The provision of toilet facilities on anaerobic species. aircraft, trains and buses has created problems in dealing with waste, away from normal sewage BASF’s biocides are ideally suited to controlling disposal systems. Similar difficulties are faced in odours associated with bacterial contamination in the camping, caravaning and boating industries. a range of application areas. Controlling odours in these temporary installations, or chemical toilets, has involved a primary strategy of odour masking with perfume additives. However, an important secondary approach is based on antimicrobial additives that inhibit the microorganisms responsible for generating the foul odours. These additives can also provide protection against pathogenic organisms that may multiply in the chemical toilet and be a potential source of infection for users. A related application has developed in recent years involving domestic pets. Various absorbent materials have been offered to the consumer as a means of providing indoor toilet facilities for pets, principally cats and, to a lesser extent, other domestic pets. Concerns over the odours associated with soiled “Cat Litter” trays and also the related hygiene issues, have led to the incorporation of antimicrobials into absorbent litters. CONTENTS PAGE Myacide® AS / S2 biocide 6 Protectol® GA 50 / Protectol GA 24 biocide 10 PAGE 5 Myacide® AS / S2 Biocide Myacide AS biocide is the industrial grade of 2- ANTIMICROBIAL ACTIVITY Bromo-2-nitropropane-1,3-diol or Bronopol and is Bronopol is one of the most advanced supplied as a crystalline solid (Myacide AS) or as bactericides available in the market for odour a liquid formulation, Myacide S2. This choice control. It operates through a unique dual action provides the formulator with a flexible approach to mechanism. Firstly, it has a powerful biocidal the control of microbial growth. action that controls the microorganisms (e.g. E.coli) that are present in human waste. Secondly, Bronopol is a broad-spectrum bactericide that is it reacts with thiol containing groups that cause highly effective at inhibiting the growth of odour bad odours e.g. hydrogen sulphide, mercaptans generating bacteria and enteric pathogens and organic sulphides to form more complex, less (disease-causing bacteria found in the gut). odorous compounds. This factor is important in both eliminating bad The Minimum Inhibitory Concentrations (M.I.C.) of odours and preventing the spread of disease in Bronopol are typically 12.5 –25ppm for a wide chemical toilet treatments and absorbent clay range of Gram negative and Gram positive formulations, including cat litter. bacteria, including Staphylococcus epidermidis, Klebsiella aerogenes, and Escherichia coli. QUALITY Myacide AS USAGE RECOMMENDATIONS Myacide AS is a white to pale yellow, free flowing, Solubility, Stability, Compatibility. crystalline solid. The product contains a minimum Bronopol is readily water-soluble and solutions 98% 2-Bromo-2-nitropropane-1,3-diol although containing up to 28% w/v are possible at ambient typical purity values may be higher. As supplied it temperature. The compound also shows a high is stable for a minimum of 3 years when kept affinity for polar solvents (e.g. up to 50% w/v in under good storage conditions. propylene glycol) which allows a flexible approach Myacide S2 is a 50% w/v solution of Bronopol in to formulating solution concentrates for ease of dipropylene glycol monomethyl ether and water. application. In complex environments, Bronopol Myacide S2 allows for ease of handling and is partitions preferentially into the polar (usually ideal for use in systems where automatic dosing is aqueous) phase. Since microorganisms grow practised. It has a shelf life of 2 years. primarily in the aqueous phase Bronopol can exert maximum effect at the site of contamination. Chemical toilet preparations generally fall into one of three categories, dry powder blends (often packed into soluble sachets), liquids and liquid concentrates. For optimum stability, liquid products should be formulated below pH6. Solid formulations and absorbent granules should avoid the use of alkaline fillers. At alkaline pH, Bronopol is less stable but efficacy is not affected. In this case Bronopol reaches equilibrium with its breakdown products which are also microbiologically active. To obtain maximum shelf stability, it is recommended that all formulation concentrates be maintained at a pH range of 4-5. PAGE 6 In common with other biocides, strong oxidising and reducing agents should be avoided. Bronopol is compatible with a large variety of fragrances, dyes and surfactants used in chemical toilet formulations. Bronopol or its concentrated solutions can be corrosive to mild steel, cast iron, galvanised iron and aluminium. For the formulation of toilet treatments for aircraft systems, recommendations are available concerning appropriate corrosion inhibitors. Further details are available from BASF MicroCheck Limited. Recommended Dose Rates. It is important that appropriate levels of Myacide AS or S2 are added to each chemical sanitation formulation and that subsequent dosing regimes accommodate in-use variables such as volume of waste load, temperature, pH and formulation ingredients. In laboratory evaluations, a level of 200ppm Myacide AS has proven highly effective