# barium

> chemical element with symbol Ba and atomic number 56

**Wikidata**: [Q1112](https://www.wikidata.org/wiki/Q1112)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Barium)  
**Source**: https://4ort.xyz/entity/barium


## References

1. Nature's Building Blocks An A-Z Guide of the Elements New Edition
2. barium. Global Substance Registration System
3. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-39-3)
4. BARIUM. PubChem
5. ChEBI release 2020-09-01
6. Atomic weights of the elements 2009 (IUPAC Technical Report)
7. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=31174)
8. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=94049)
9. Nuovo soggettario
10. Freebase Data Dumps. 2013
11. Barium. ChemSpider
12. Chemical Constituents of Cordyceps cicadae
13. [Registros de autoridad de "Materia" de la Biblioteca Nacional de España. Spain open data portal](https://www.bne.es/media/datosgob/catalogo-autoridades/materia/materia-UTF8.zip)
14. Integrated Authority File
15. periodic table
16. Barium, Elemental. Hazardous Substances Data Bank. 2019
17. Atomic weights of the elements 2013 (IUPAC Technical Report)
18. Barium. ECHA Substance Infocard database
19. UMLS 2023
20. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
21. [California Proposition 65 list of chemicals](https://oehha.ca.gov/chemicals/barium)
22. CABI Thesaurus
23. National Library of Israel
24. KBpedia
25. GF WordNet
26. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
27. UniChem