Reagent Bottles, Narrow Mouth (Printed Graduation)

Quick Answer: A reagent bottle with printed graduation is a narrow mouth storage bottle marked with a printed volume scale on its side, used to hold and pour liquid reagents while showing roughly how much is inside. The image filename in this listing refers to polypropylene.

What the Printed Scale Adds

On a plain bottle the only way to know how much reagent is left is to guess or pour it out. A printed scale shows the level at a glance, which helps technicians decide when to make up a fresh batch and lets students see that they have taken a fair share. When a rough dilution is made up directly in the bottle, the marks also give a quick guide to volume.

These graduations are approximate. They are printed for convenience, not calibrated for analysis, so volumes that matter should be measured with a measuring cylinder, pipette or volumetric flask and then transferred. The title does not state the material; the image filename refers to polypropylene, which is generally autoclavable at 121 °C and translucent enough for the liquid level to show against the scale.

Compared with the plain plastic narrow mouth reagent bottle, this version is chosen where keeping track of stock matters. The same idea appears in the printed graduation beaker in the Lab Glassware range.

Applications

• Stock bottles in a prep room where technicians need to see when a reagent is running low
• Making up approximate dilutions, such as detergent or rinsing solutions, directly in the bottle
• Dispensing reagent to student groups in roughly equal amounts
• Storing buffers or media components where autoclavable polypropylene is useful

Care & Handling

• Keep acetone and similar solvents off the printed scale; they can lift printed markings from some plastics.
• Wash by hand with mild detergent rather than scrubbing across the graduations.
• Read the level at eye height with the bottle standing on a level surface.
• If autoclaving, loosen the cap and confirm the resin first.

Specifications

Why Choose LabEquip

Technicians who manage reagent stock across several classes find a visible scale saves time and waste. LabEquip lists this bottle in its chemistry lab equipment range; ask about capacities through the contact page.

Frequently Asked Questions

Can I use the printed graduation to measure reagent volumes?

Only roughly. Printed scales on bottles are for estimating contents and approximate make-up. Measure volumes that affect results with a measuring cylinder, pipette or volumetric flask.

Will the printed scale wear off?

Printed markings can fade with abrasive scrubbing, strong solvents or repeated harsh washing. Hand washing with a mild detergent and a soft cloth keeps the scale legible for longer.

Is polypropylene suitable for acids and alkalis?

Polypropylene generally resists dilute and many concentrated acids and alkalis at room temperature, but strong oxidising acids such as concentrated nitric acid attack it. Check compatibility for anything stronger than routine bench reagents.

Can the bottle be autoclaved?

Polypropylene bottles are generally autoclavable at 121 °C with the cap loosened. The listing image filename indicates polypropylene, but confirm the material before sterilising.

Why read the level at eye height?

Looking from above or below makes the liquid surface appear against the wrong mark, an effect called parallax. With the bottle on a level surface and your eye level with the liquid, the reading is as good as the scale allows.

How is this different from a measuring cylinder?

A measuring cylinder is made for measuring, with a narrow bore and finer, more accurate marks. This bottle is made for storage and pouring, with a scale that only indicates roughly how much is inside.

Last Updated: September 2026