As of 2022-03-07, the Wikidata property CAS Registry Number (P231) is used on 941,068 items as main value on statements (not counting qualifiers) of the Q and P namespaces.

Closest properties: by cardinality of intersection, by Jaccard index.

Display properties of the following types:                                    

Closest properties by cardinality of intersection

IDLabelIntersection cardinalityJaccard index
P235 InChIKey 876,488
 0.6393
P234 InChI 875,643
 0.6417
P3117 DSSTox substance ID 846,585
 0.8961
P8494 DSSTOX compound identifier 844,744
 0.8942
P662 PubChem CID 763,536
 0.6702
P2840 NSC number 111,495
 0.1185
P661 ChemSpider ID 74,671
 0.0753
P652 UNII 58,159
 0.0611
P232 EC number 55,464
 0.0589
P2566 ECHA InfoCard ID 55,346
 0.0588
P683 ChEBI ID 30,628
 0.0301
P592 ChEMBL ID 29,989
 0.0312
P7049 AICS Chemical ID (former scheme) 16,380
 0.0174
P646 Freebase ID 15,572
 0.0029
P1579 Reaxys registry number 13,912
 0.0147
P6366 Microsoft Academic ID 13,380
 0.0112
P665 KEGG ID 13,048
 0.0138
P2671 Google Knowledge Graph ID 9,425
 0.0011
P715 DrugBank ID 9,113
 0.0097
P6689 MassBank accession ID 8,339
 0.0088
P3636 PDB ligand ID 7,395
 0.0077
P4964 SPLASH 7,349
 0.0078
P679 ZVG number 7,008
 0.0074
P3345 RxNorm ID 6,822
 0.0072
P486 MeSH descriptor ID 6,728
 0.0069
P2063 LIPID MAPS ID 6,370
 0.0066
P2062 HSDB ID 5,731
 0.0061
P638 PDB structure ID 5,455
 0.0057
P595 Guide to Pharmacology Ligand ID 4,941
 0.0052
P3073 CosIng number 4,766
 0.0051
P2057 Human Metabolome Database ID 4,183
 0.0044
P2064 KNApSAcK ID 4,003
 0.0043
P10283 OpenAlex ID 3,932
 0.0038
P7025 HCIS ID 3,596
 0.0038
P267 ATC code 3,094
 0.0033
P2115 NDF-RT ID 3,047
 0.0032
P2892 UMLS CUI 2,538
 0.0026
P1578 Gmelin number 2,421
 0.0026
P9066 FL number 2,389
 0.0025
P8072 CAB ID 2,270
 0.0023
P1417 Encyclopædia Britannica Online ID 1,810
 0.0016
P657 RTECS number 1,690
 0.0018
P5220 ICSC ID 1,630
 0.0017
P9557 JECFA number 1,570
 0.0017
P8408 KBpedia ID 1,368
 0.0014
P672 MeSH tree code 1,352
 0.0014
P4168 IEDB Epitope ID 1,345
 0.0014
P5076 Römpp online ID 1,304
 0.0014
P10245 MedlinePlus drug identifier 1,216
 0.0013
P3417 Quora topic ID 1,093
 0.0010

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P3117 DSSTox substance ID 846,585
 0.8961
P8494 DSSTOX compound identifier 844,744
 0.8942
P662 PubChem CID 763,536
 0.6702
P234 InChI 875,643
 0.6417
P235 InChIKey 876,488
 0.6393
P2840 NSC number 111,495
 0.1185
P661 ChemSpider ID 74,671
 0.0753
P652 UNII 58,159
 0.0611
P232 EC number 55,464
 0.0589
P2566 ECHA InfoCard ID 55,346
 0.0588
P592 ChEMBL ID 29,989
 0.0312
P683 ChEBI ID 30,628
 0.0301
P7049 AICS Chemical ID (former scheme) 16,380
 0.0174
P1579 Reaxys registry number 13,912
 0.0147
P665 KEGG ID 13,048
 0.0138
P6366 Microsoft Academic ID 13,380
 0.0112
P715 DrugBank ID 9,113
 0.0097
P6689 MassBank accession ID 8,339
 0.0088
P4964 SPLASH 7,349
 0.0078
P3636 PDB ligand ID 7,395
 0.0077
P679 ZVG number 7,008
 0.0074
P3345 RxNorm ID 6,822
 0.0072
P486 MeSH descriptor ID 6,728
 0.0069
P2063 LIPID MAPS ID 6,370
 0.0066
P2062 HSDB ID 5,731
 0.0061
P638 PDB structure ID 5,455
 0.0057
P595 Guide to Pharmacology Ligand ID 4,941
 0.0052
P3073 CosIng number 4,766
 0.0051
P2057 Human Metabolome Database ID 4,183
 0.0044
P2064 KNApSAcK ID 4,003
 0.0043
P7025 HCIS ID 3,596
 0.0038
P10283 OpenAlex ID 3,932
 0.0038
P267 ATC code 3,094
 0.0033
P2115 NDF-RT ID 3,047
 0.0032
P646 Freebase ID 15,572
 0.0029
P2892 UMLS CUI 2,538
 0.0026
P1578 Gmelin number 2,421
 0.0026
P9066 FL number 2,389
 0.0025
P8072 CAB ID 2,270
 0.0023
P657 RTECS number 1,690
 0.0018
P5220 ICSC ID 1,630
 0.0017
P9557 JECFA number 1,570
 0.0017
P1417 Encyclopædia Britannica Online ID 1,810
 0.0016
P4168 IEDB Epitope ID 1,345
 0.0014
P672 MeSH tree code 1,352
 0.0014
P8408 KBpedia ID 1,368
 0.0014
P5076 Römpp online ID 1,304
 0.0014
P10245 MedlinePlus drug identifier 1,216
 0.0013
P2671 Google Knowledge Graph ID 9,425
 0.0011
P8121 UM-BBD compound ID 927
 0.0010