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Adamas-Beta Solid Round Clear Glass Boiling Stones Beads, 2mm Diameter, Approx 1000 Beads

Q: What diameter is recommended for ethanol distillation?

I have the 4 mm now, and they are small. I would go with the 6 mm or 12 mm diam. As long as they fit through the neck of your boiling flask. It should only take a few, but this depends on the size of the flask and the volume to be distilled.

Q: Are these beads in fact borosilicate glass. It shows up as such in a product description search but not in the product description itself

I am not sure if they are true borosilicate glass. I am for certain they are NOT polymer or ceramic materials. They appear, with the naked eye, to not be porous, but I have not observed them under a microscope nor subjected them to a micro-porousity analytical experiment, e.g. BET analyzer. They "feel" like small glass beads - just based on my observation. I have used them in a reaction with the internal temperature above 350 C, with no problem while using a strong inorganic acid. Hope this helps; from an industry-based scientist.

Q: Can they be used in freezing packs will they withstand freezing?

These beads are solid. I would assume that they can withstand freezing without cracking, but I do not know for sure.

Q: are these sterile? can they be made sterile?

You can boil them...that's what they are for...boiling stones...boiling will kill stuff.

4.5/5

Product ID: 647633653

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Adamas-Beta Solid Round Clear Glass Boiling Stones Beads, 2mm Diameter, Approx 1000 Beads

Have a Question? See What Others Asked

What diameter is recommended for ethanol distillation?

Are these beads in fact borosilicate glass. It shows up as such in a product description search but not in the product description itself

Can they be used in freezing packs will they withstand freezing?

are these sterile? can they be made sterile?

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€ 77.54

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

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Smooth transaction and product arrived in perfect condition.

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