are these tubes leak proof when filled with liquids?

They're screw cap and pretty leak proof. I used them to collect 50 water samples locally, kept them in ziplocs with their respective collection survey, and nothing spilled.

How accurate is the graduation of these tubes?

Maybe the supplier has specs, but I suspect the precision is one of several more appropriate questions. It's not advertised as measuring liquids for quantitative analysis, just "solid, powder, seeds, pills, granular objects" but the volume is given to 1/10th of a milliliter. Being precise about the volume of a seed seems like an oxymoron, whereas powders are not. It will be interesting what answers you get!

Is the tube and cap pp5? I'm wondering if both can withstand an autoclave.

The description states the blue cap is HDPE and not PP. HDPE will not withstand the heat in an autoclave.

Is there a tube rack on amazon available for these tubes?

No specific idea, sorry, but rack is mentioned a lot on the product page. They do stand upright on their own.

50ml Plastic Centrifuge Tubes With Screw Cap Certbuy 50 Pack

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VT14321

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Description

🧬 Elevate your lab game with precision and durability in every tube!

BUILT TO ENDURE - Durable polypropylene construction withstands low temperatures and rough handling without cracking.
MULTIPURPOSE MASTERY - Ideal for powders, seeds, pills, and liquids—your all-in-one solution for organized sample management.
LEAK PROOF CONFIDENCE - Snap-on blue HDPE screw caps provide a secure seal, eliminating spills and contamination.
STAND TALL WORK SMART - Freestanding conical design offers stability and easy handling during experiments or storage.
PRECISION IN EVERY DROP - Graduated markings in 2.5ml increments ensure lab-grade accuracy for your samples.

The CertBuy 50 Pack 50ml Plastic Centrifuge Tubes combine durable polypropylene construction with precise graduated markings and secure screw caps. Designed for professional sample handling, these self-standing conical tubes resist low temperatures and prevent leaks, making them perfect for scientific, industrial, or even creative storage needs.

Reviews

C**.

13.10.2025

H**T

24.01.2020

C**N

13.03.2026

A**R

4.09.2025

J**.

17.10.2025

A**E

1.09.2025

J**E

18.05.2022

J**D

23.03.2025

B**T

5.09.2025

A**O

28.06.2023

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VT14321

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50ml Plastic Centrifuge Tubes with Screw Cap, CertBuy 50 Pack Self-Standing Plastic 50ml Test Tube Polypropylene Conical Tubes with Cap, Graduated Marks

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Common Questions