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Topic: Difference between two similar formulas ?  (Read 1102 times)

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Offline Silencer23

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Difference between two similar formulas ?
« on: March 14, 2020, 09:20:19 AM »
Hi friends, I am looking here at two similar formulas of a GAG like chemical (Pentosan Polysulfate Sodium) but with different CAS identifiers.
I was asked what is the "core" of the difference between them.
If there is no difference, why are they identified differently in terms of CAS ?

Thanks fellas !

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Offline chenbeier

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Re: Difference between two similar formulas ?
« Reply #1 on: March 14, 2020, 11:34:33 AM »
It looks like its the same stuff according the physical parameters, but in first formulation n is not specified. In second one its 6 to12.
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Offline Silencer23

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Re: Difference between two similar formulas ?
« Reply #2 on: March 14, 2020, 12:16:14 PM »
I see ! So in theory the first one is "generic" and the second one has a set parameter so that it could be called 37319-17-8.
The first one could also be  6 to 12 but "it doesn't have to"
In turn, formula 2 is in theory more expensive to produce requiring more QA

Did I make valid  assumptions  ?
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Offline Babcock_Hall

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Re: Difference between two similar formulas ?
« Reply #3 on: March 15, 2020, 10:42:01 AM »
From what I have been told, the same compound may have two different CAS numbers.
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