Accuracy issue of the specific gravity parameter in the Aspen NIST-TRC database
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Aspen version 8.8: 1. On the component page, select the NIST-TRC database. 2. Search for CAS number 295-02-3 and add the substance. 3. Check the properties of the substance in the review section; the specific gravity SG at 15.6 degrees Celsius is shown as 0.000866. This value seems incorrect – it would be more reasonable if multiplied by 1000. Moreover, it’s not just one substance that exhibits this behavior; they are all hydrocarbons with high boiling points and large molecular weights, so their specific gravity cannot be that low. I’m not sure whether this is a problem with the database itself or with the Aspen software. If anyone knows, let’s discuss it together.
Version 8.4: Several similar substances were found in NIST, and this issue does not occur there
I’ll list a few CAS numbers that I found to have issues, so you can use your own Aspen version to check them: 115209-60-4, 75163-99-4, 1720-14-5, 643-58-3, 588-59-0, 2350-89-2, 605-39-0
V10 is already 0.8657
Could it be a bug in Aspen, fixed in later versions?