# thorium

> chemical element with symbol Th and atomic number 90

**Wikidata**: [Q1115](https://www.wikidata.org/wiki/Q1115)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Thorium)  
**Source**: https://4ort.xyz/entity/thorium


## References

1. Global Substance Registration System
2. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-29-1)
3. ChEBI release 2020-09-01
4. Atomic weights of the elements 2009 (IUPAC Technical Report)
5. RAMEAU
6. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=145957)
7. Nuovo soggettario
8. Freebase Data Dumps. 2013
9. Thorium. ChemSpider
10. PubChem
11. Characterization of steroidal glycosides from the extract of Paris Polyphylla var. Yunnanensis by UPLC/Q-TOF MSE.
12. Integrated Authority File
13. THORIUM, ELEMENTAL. Hazardous Substances Data Bank. 2019
14. Atomic weights of the elements 2013 (IUPAC Technical Report)
15. YSO-Wikidata mapping project
16. Thorium. ECHA Substance Infocard database
17. BabelNet
18. UMLS 2023
19. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
20. CABI Thesaurus
21. National Library of Israel
22. KBpedia
23. GF WordNet
24. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
25. UniChem