Cole-Parmer Laboratory Glass Erlenmeyer Flask 125 mL (12 Pack)

In this review the Cole-Parmer Laboratory Glass Erlenmeyer Flask 125 mL (12 Pack) is assessed for routine lab work and hobbyist chemistry; the bottom line is that it is a dependable, economical set for anyone needing standardized, autoclavable flasks. The single biggest reason to buy is the combination of durable borosilicate 3.3 glass with precise graduations, which makes these flasks useful for repeated heating, cooling and measured liquid handling without frequent replacement.

Key Features

• Borosilicate construction: Durable 3.3 borosilicate glass resists thermal shock and chemical wear so the flasks remain serviceable across many uses.
• Easy-to-read graduations: Clear external markings let users measure liquids with confidence and reduce guesswork during routine transfers.
• Wide temperature range: Rated to withstand roughly -50 to 550oC, the flasks handle a broad set of temperature-sensitive procedures safely.
• Autoclavable design: The flasks can be sterilized and reused, which supports lab hygiene and lowers long-term consumable costs.
• Heavy-duty rim and narrow mouth: A reinforced rim reduces chipping during handling while the narrow opening improves pouring control and minimizes spillage.
• Precise graduated tolerances: With tolerances to about 0.05, the measurement markings support applications where small volume accuracy matters.

Who It's For

The 125 mL 12-pack is well suited to teaching labs, small research groups, and serious hobbyists who need multiple identical flasks for parallel experiments, titrations, or solution preparation. Its autoclavable nature and borosilicate glass make it a practical choice when sterilization and thermal cycling are routine.

Those who require ultra-high precision volumetrics or certified volumetric flasks for trace analytical work should look elsewhere; this set is intended for general lab use rather than primary reference measurements.

Pros & Cons

Pros

• High-quality borosilicate glass construction provides good thermal resistance and longevity.
• Visible, easy-to-read graduations reduce measurement mistakes in daily workflows.
• Autoclavable and reusable, which lowers consumable spend for labs that sterilize glassware frequently.
• Flat-bottom and thickened rim improve stability and resistance to chipping during normal use.

Cons

• Some users report mixed experiences on ease of cleaning, so residues from certain solutions may require extra effort to remove.
• Not intended as a certified volumetric instrument for precision analytical calibration.

Specifications

Brand	Cole-Parmer
Material	Borosilicate 3.3 glass
Volume	125 mL
Pack quantity	12 pack
Temperature range	Approximately -50 to 550oC
Autoclavable	Yes
Graduation tolerance	About 0.05

Our Verdict

This 12-pack of 125 mL Erlenmeyer flasks is a sensible purchase for labs and educators who need durable, autoclavable glassware with clear graduations at a reasonable cost. It delivers consistent performance for heating, mixing and measured transfers and represents good value for general laboratory and classroom use.

Frequently Asked Questions

Are these flasks safe for autoclaving?
Yes. The flasks are made of borosilicate 3.3 glass and are described as autoclavable for routine sterilization.

Can they be used at high and low temperatures?
Yes. The manufacturer indicates a wide temperature range from around -50 to 550oC, suitable for many thermal procedures.

How accurate are the measurement markings?
The external graduations have tolerances to about 0.05, making them suitable for typical lab measurements though not as precise as certified volumetric glassware.