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Add PlastChem#478

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cthoyt wants to merge 10 commits intomainfrom
add-plastchem
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Add PlastChem#478
cthoyt wants to merge 10 commits intomainfrom
add-plastchem

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@cthoyt cthoyt commented Feb 10, 2026

This pull request adds code for ingesting PlastChem, a database of chemicals relevant in the plastics sciences. A few key highlights:

  • most chemicals have a CAS and PubChem ID
  • many chemicals that only have a CAS do not have a name propagated through, because CAS doesn't have a free API iirc
  • ECHA classification is interesting, but appears to be free text in their site as well
  • It has a detailed classification scheme, which would be good to either upstream into ChEBI or to make a custom ontology for

@cthoyt cthoyt added the Nomenclature Data Nomenclature to convert to OBO label Feb 10, 2026
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Nomenclature Data Nomenclature to convert to OBO

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