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Thread: Sodium Thiosulphate Pentahydrate
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06-01-2023, 08:27 PM #1Extreme Koi Member
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Sodium Thiosulphate Pentahydrate
Hi all, I meant to order Sodium Thiosulphate but ordered as per tittle, anyone used this, is it as safe as normal ST
Thanks
Ian
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06-01-2023, 08:59 PM #2Senior Member
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I Think you'll find it is the normal form it's just the name is usually shortened when it is sold.
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08-01-2023, 11:23 AM #3Extreme Koi Member
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That's correct. The proper chemical name for the crystalline form is sodium thiosulphate pentahydrate (Na2S2O3·5H2O)
Although, for simplicity, it's commonly sold just under the name sodium thiosulphate and, if the formula is quoted, it may either be the full form (Na2S2O3·5H2O) or the shortened form (Na2S2O3).
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08-01-2023, 11:52 AM #4Extreme Koi Member
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This is the product / company I use to use , hope it help !
Originally Posted by Ianb
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08-01-2023, 12:09 PM #5Extreme Koi Member
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Sorry if I didn't make it clear but you can use it whether its sold as sodium thiosulphate pentahydrate or just sodium thiosulphate.
I calculated this chart for students on my on-line water quality course which is designed for an international student base so I calculated it for all three major measuring systems which allows them to use whichever units they prefer. You only need to use enough for the amount of top up water that is about to be added but sodium thiosulphate is virtually non toxic unless added in ridiculous quantities so you can be very generous in the amounts added.
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