User talk:Trevor Gauntlett

Propylene tetramer
Hi Trevor,

I have moved the text you wrote to Draft:Propylene tetramer. This is because there are no proper references, and it appears to be a comment on database entries. If you can find book or journal references that write about this topic, then please include them. Graeme Bartlett (talk) 21:27, 6 December 2022 (UTC)


 * Hi Graeme. I suppose it was a comment, BUT
 * 1) It's all factual. I don't even say the incorrect depictions are wrong. I just say they are inconsistent with the CAS number
 * 2) I replaced a link that was wrong with some text. Is that not an improvement? Even if I self-certify with some high school chemistry that I am right. If it had been a significant entry of a couple of paragraphs, I could have cut the garbage out, but it was just an incorrect link.
 * 3) My references from the CAS numbers go the ECHA and the US National Institutes of Health. There aren't many more robust sources of publicly available chemical information. However, as I sadly found out (and my motivation for the edit) there are some sources that should be robust - such as Wikidata and the US Environmental Protection Agency - that perpetuate the garbage. For example, https://sor.epa.gov/sor_internet/registry/substreg/searchandretrieve/advancedsearch/externalSearch.do?p_type=CASNO&p_value=6842-15-5 gives a IUPAC Name that would have a molecular weight 162.xx. The web page gives the molecular weight as 168.32, which is consistent with the Molecular Formula on the row below. And correct :) Trevor Gauntlett (talk) 12:30, 13 December 2022 (UTC)