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YK000  
#1 Posted : Thursday, August 08, 2019 3:48:55 PM(UTC)
YK000
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Hello

6:2 Fluorotelomer sulfonic acid (6:2 FTS) and 6:2 Fluorotelomer Sulfonate (6:2 FTS), both the same compound, as two different chem codes: 27619-97-2 and 425670-75-3. Which should be the correct chemcode for this compound?

NickT  
#2 Posted : Thursday, August 08, 2019 4:12:20 PM(UTC)
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Hi,

Although it seems like these are the same compound (and they do have the same abbreviation), there is actually a difference between the anion form and acid form, and there is two different CAS numbers (hence the ChemCodes in ESdat).

I recommend having a read through the document at the following link, which summarises the different naming conventions for PFAS: https://pfas-1.itrcweb.o...conventions__3_16_18.pdf

In this respect, it's important to know if the lab you are using reports the anion or acid form, and that will determine the correct ChemCode.

Thanks,

Nick

Edited by user Thursday, August 08, 2019 4:17:05 PM(UTC)  | Reason: updated link

thanks 1 user thanked NickT for this useful post.
YK000 on 8/8/2019(UTC)
YK000  
#3 Posted : Thursday, August 08, 2019 4:31:24 PM(UTC)
YK000
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Thanks Nick.

What about

ChemCodeChem Name
335-77-3Perfluorodecanesulfonic acid (PFDS)
67906-42-7Perfluorodecane sulfonic acid (PFDS)
NickT  
#4 Posted : Friday, August 09, 2019 1:13:20 PM(UTC)
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I believe that 335-77-3 is the correct ChemCode for Perfluorodecanesulfonic acid (PFDS).

67906-42-7 is Ammonium Perfluorodecanesulfonic acid (NH4 PFDS), which as I understand it is a different compound (although I'm not a chemist).

It may be worth you following this up with a chemist at your organisation, or with one of your lab contacts.

Cheers,

Nick

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