Diluting and Decanting Chemicals Safely

Dilute and decant cleaning chemicals safely by measuring to the manufacturer's dose rate, mixing into water (not the reverse), and pouring into a clean, purpose-made container that you label immediately. Never use food or drink containers for chemicals, and never mix products together. Correct dilution keeps sanitisers effective, protects staff, and stops chemical contamination of food, surfaces and equipment in your kitchen. Key takeaways: Always dose to the manufacturer's instructions on the label or Safety Data Sheet (SDS) - too weak fails to sanitise, too strong wastes product and can leave residues.. Add chemical to water, not water to chemical, and mix in a well-ventilated area wearing the PPE the SDS specifies.. Label every decanted container immediately with the product name, dilution and key hazards - an unlabelled decant is a serious risk.. Never decant chemicals into food or drink containers (bottles, jars, cups), and never store or mix them near food.. Never combine different chemicals - some combinations (for example bleach and acid) release toxic gas.. Common well-known reference figures: Item, Guide figure, Note. Chemical dose rate — Per manufacturer label / SDS — The label ratio (e.g. mL per litre) is authoritative - do not guess. Mixing order — Chemical into water — Reduces splashing and heat with some products. Decant containers — Purpose-made only — Never food or drink containers. Labelling — Immediately after decanting — Product name, dilution and hazards. Mixing products — Never combine chemicals — Some mixes release toxic gas. Why safe diluting and decanting matters Most cleaning and sanitising chemicals arrive as concentrates that must be diluted before use. Getting the dilution and the decant right protects three things at once: your staff, your food and your compliance. A sanitiser mixed too weak may not kill enough bacteria to be effective, so surfaces look clean but are not safe. Mixed too strong, it wastes money and can leave a chemical residue on food-contact surfaces. Decant it into an unlabelled or reused food container and you create a real risk of someone drinking it or of the chemical contaminating food. The Food Standards Code requires food businesses to take practicable measures to prevent contamination, and chemical contamination is squarely within that duty. Treat every dilution and decant as a controlled step, not a quick pour. Effectiveness: correct concentration is what actually sanitises the surface.. Safety: concentrates can burn skin and eyes and give off harmful vapours.. Contamination control: stray chemical on food or surfaces is a food-safety hazard.. Cost: over-dosing wastes product; under-dosing means re-cleaning.. Read the label and SDS before you start The manufacturer's label and the Safety Data Sheet (SDS) are your authoritative source for how to dilute and handle each product. The dose rate (for example, a set number of millilitres per litre of water, or a ratio such as 1:100) is set by the manufacturer for a reason - follow it rather than guessing or eyeballing. The SDS also tells you the personal protective equipment (PPE) needed, first-aid measures, ventilation requirements and what the chemical must never be mixed with. Keep a current SDS for every hazardous chemical you hold, stored where staff can reach it quickly, and make sure the version matches the product actually on your shelf. Confirm the exact dose rate or dilution ratio for the task (cleaning versus sanitising can differ).. Check the required PPE - typically gloves and eye protection, sometimes an apron.. Note incompatibilities: what this product must never be combined with.. Have the SDS accessible and current; replace it when the product or formulation changes.. Measure and dose accurately Accurate dosing is the heart of safe dilution. Use a dedicated measuring jug, dosing pump or an automatic dispensing unit rather than free-pouring by eye. Automatic dilution dispensers, where the concentrate is drawn and mixed to a fixed ratio, remove most human error and are worth using where available. If you measure manually, work out the volume you actually need so you are not making up litres of diluted sanitiser that will sit unused - many diluted products lose strength over time, so mix what you will use. Always add the concentrate to the water rather than water to the concentrate; this reduces splashing and heat build-up with some chemicals. Never assume a stronger mix cleans better - it does not, and it can leave residues. Use a marked measuring jug or a calibrated dosing pump - not a splash or a squirt.. Prefer automatic dilution dispensers where the business has them installed.. Add chemical to water, then gently mix; avoid vigorous shaking that creates aerosols.. Mix realistic quantities - freshly diluted sanitiser is more reliable than old stock.. Choose the right decant container Decant only into a container designed and approved for that chemical. Purpose-made trigger-spray bottles and jugs from the chemical supplier are made from compatible plastic and come ready to label. The single most important rule is that you must never decant a chemical into a food or drink container - no soft-drink bottles, water bottles, milk jugs, jars or cups. A clear liquid in a familiar bottle is exactly how accidental poisoning happens. Equally, never put food into a container that has held chemicals. Keep chemical containers and food containers as completely separate populations, ideally different in colour or shape so nobody confuses them at a glance. Use supplier-provided or purpose-made chemical bottles made of compatible material.. Never reuse food or drink containers for any chemical, even briefly.. Make sure the container is clean and, if reused for the same product, fully empty and dry.. Colour-code or physically separate chemical containers from anything used for food.. Label every decanted container immediately An unlabelled decanted container is one of the most common and most dangerous chemical hazards in a food business. As soon as you decant, label the container - do not leave it, even for a minute, on the basis that you will label it later. The label should identify the product clearly, so anyone who picks it up knows what it is, how it is diluted and the main hazards. Where practical, keep the manufacturer's hazard information (such as pictograms and safety words) visible. If a decanted container will be used and emptied within your immediate control on the same shift, some businesses use a simplified label, but a clear product name and hazard warning is the minimum; confirm your labelling approach with your state or territory work-health-and-safety regulator. Product name that matches the SDS on file.. Dilution or strength (for example, 'sanitiser, diluted ready-to-use').. Key hazard words and, where practical, pictograms from the original label.. Never rely on memory or on the colour of the liquid to identify a chemical.. Avoid contamination during and after decanting Decant away from food, food-contact surfaces and food-preparation areas so splashes cannot reach ingredients or equipment. Work in a well-ventilated space, wear the PPE the SDS specifies, and wipe up any spills straight away following the SDS spill procedure. Never mix two chemicals together - some combinations release toxic gases, and mixing can also neutralise both products. Wash the outside of the container and your hands after decanting, and store diluted chemicals in a dedicated, clearly marked area, separate from and ideally below food so nothing can drip onto it. Finally, make sure only trained staff dilute and decant chemicals, and record that training as part of your food-safety and WHS systems. Decant and mix well away from open food and food-contact surfaces.. Never combine chemicals - especially bleach-based and acid-based products.. Clean spills immediately using the SDS method; wash hands and container exterior after.. Store diluted chemicals separately from food, and restrict the task to trained staff.. Checklist: SDS for the product is current, on file and accessible.. Correct dose rate confirmed from the label for this task.. Required PPE worn; area well ventilated and away from food.. Approved, clean chemical container used - never a food container.. Chemical added to water and measured accurately.. Container labelled immediately with name, dilution and hazards.. Spills cleaned per SDS; hands and container exterior washed.. Diluted chemical stored in the designated area, separate from food.. Only trained staff dilute and decant; training recorded.. Common mistakes: Decanting into an old soft-drink or water bottle - a leading cause of accidental poisoning.. Leaving a decanted container unlabelled 'just for now'.. Eyeballing the dose instead of measuring - too weak fails to sanitise, too strong leaves residue.. Adding water to concentrate instead of concentrate to water, causing splashes.. Mixing two chemicals together in the belief it cleans better.. Diluting or decanting on a food-prep bench where splashes can reach food.. Making up large batches of diluted sanitiser that lose strength before use..