Laboratory wash bottles: how can solvents and rinsing liquids be dispensed accurately?

Indispensable on any lab bench, the wash bottle (also called a squeeze bottle) dispenses solvents and rinsing solutions with simple one-handed handling and precise jet control. Whether you are rinsing glassware, making up to volume, moistening a filter or cleaning an electrode, it saves time while reducing splashes. Match your media: choose soft LDPE bodies or fluoropolymers (FEP/PTFE) for aggressive solvents, with no-drip caps and fine spouts. Versions with GHS/CLP safety labelling make identification clear; replacement caps extend service life. Self-venting models limit pressure build-up with volatile solvents.

What are the different types of wash bottles and what are their advantages?

Three families cover most needs. The safety-labelled wash bottle includes the solvent name, colour codes and GHS/CLP pictograms to avoid mix-ups. Often fitted with fine, anti-drip nozzles and self-venting systems, they suit common solvents (acetone, ethanol, IPA, etc.). The unlabelled wash bottle offers maximum flexibility for distilled water, buffers or in-house solutions; prioritise a wide writing area, a translucent graduated body and suitable chemical compatibility. Finally, the wash bottle cap (with dip tube) lets you replace a worn head or tune the flow rate, extending the service life of the bottle.

On materials, soft LDPE enables controlled squeeze dispensing and resists many aqueous media and alcohols; for aggressive or aromatic solvents, choose FEP/PTFE or HDPE. Some PP or fluoropolymer models are autoclavable (check the datasheet). Key selection criteria: chemical compatibility, cap leak-tightness, nozzle precision, presence of a GHS label, capacity (250–1000 mL) and in-hand ergonomics.

In which fields is a laboratory wash bottle used?

• Life sciences: rinsing slides, humidifying membranes, preparing buffers for cell culture (sterilisable models recommended).
• Microbiology: aseptic dispensing of water/solutions; autoclavable bottles in PP or FEP as required.
• Chemistry and synthesis: controlled addition of solvents, washing reactive glassware; choose compatible materials.
• Pharma/cosmetics quality control: cleaning accessories, standardised rinsing; mandatory GHS labelling for solvents.
• Food and beverage: preparing diluents, rinsing tools in rapid testing areas.
• Environment: cleaning probes and electrodes, rinsing filters during sampling.
• Chromatography: humidifying stationary phases, washing reservoirs and funnels; fine anti-drip spout.
• Teaching: safe technique, clear labelling to avoid mix-ups.

Our range of wash bottles and accessories

Frequently asked questions about laboratory wash bottles

How to choose the material for a wash bottle?
For aqueous media/alcohols, flexible LDPE is suitable. For aggressive solvents, go for FEP/PTFE or HDPE. Always check a chemical compatibility chart.

Acetone or toluene: which type to use?
Acetone requires a model explicitly rated compatible. For toluene/aromatics, favour fluoropolymers. Use a GHS-labelled wash bottle for safety and traceability.

Is it autoclavable?
Most LDPE are not. Versions in PP or FEP/PTFE may be (cycle and temperature per manufacturer). Always check the product instructions.

How to prevent leaks and residual drips?
Choose leak-tight, drip-free caps and fine nozzles; do not overfill; keep the bottle upright; clean the tip and replace the cap if worn.

Safe maintenance and reuse?
Rinse (triple rinse), dedicate each wash bottle to one product, label clearly. Replace at first signs of clouding, cracks or persistent odours. Spare caps available.

Which capacity to choose?
250–500 mL for the bench; 1 L if rinsing frequently. Consider ergonomics and stream control: smaller = better precision, less weight in hand.

What marking is required in the lab?
State the content name and GHS/CLP pictograms. Pre-labelled wash bottles reduce errors; otherwise use a durable, legible label.