Purigen is just amberlyst? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 06-08-2019, 05:54 PM Thread Starter
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Purigen is just amberlyst?

My work has me doing some chemical synthesis and we use amberlyst resin to absorb cationic impurities amongst other things. Do you guys think purigen is just amberlyst sold at a markup. Quick googling suggests that this may be the case.
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post #2 of 5 (permalink) Old 06-08-2019, 07:41 PM
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Possibly, But there are probably a lot of different ion exchange resins on the market. The only thing I can think of is to compare the color of amberlyst. The Purgen I have is white.

I am very curious about Amberlyst (hadn't heard of it until your post). Do you have a good source of public information regarding it?
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post #3 of 5 (permalink) Old 06-08-2019, 07:42 PM
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Interesting. Could be...

I had to Google Amberlyst, and think it's also funny how similar the Dow and Seachem logos are!
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post #4 of 5 (permalink) Old 06-08-2019, 07:52 PM
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I've said before that I think almost every product marketed for aquariums exists for other industries and is rebranded with a fish on the bottle and marked up. Very interested to see if this turns out to be the case here. Purigen and Poly Filters are two that I have no idea what are made from and would love to change that.

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post #5 of 5 (permalink) Old 06-09-2019, 04:10 AM Thread Starter
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I am doing some searching. I believe that indeed it is probably a product from the amberlite family of functionalized polystyrene resins. I think it could be one of a number of these types of materials. For example:

https://www.dupont.com/content/dam/D.../177-03817.pdf


I believe if one were to buy from certain auction sites or chinese importers you could obtain something similar in functionality at a much reduced cost. It would probably not be the exact same polymer and may alter water chemistry in a different way but I think it would be similar. Furthermore, looking at some pricing it would be probably be around 1-200 dollars per cubic FOOT of this material. This about a 1/4 the price of purigen.

Some other thoughts: I think it probably a basic type resin functionalized with amines because of the fishy smell Purigen gets when fully regenerated. Its contraindication with slime coat water conditioners is probably because of strong hydrophobic binding of these polymers (usually polyamines or polyethylene glycol or something) to the polystyrene backbone. Further cationic resins such as aminated polystyrene are generally regenerated with alkaline such as bleach or weak NaOH.

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Last edited by Jeffww; 06-09-2019 at 04:26 AM. Reason: more info
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