As of 2022-03-07, the Wikidata property ChemSpider ID (P661) is used on 124,675 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 124,216
 0.0950
P234 InChI 122,245
 0.0939
P662 PubChem CID 121,329
 0.1257
P231 CAS Registry Number 74,671
 0.0753
P683 ChEBI ID 60,490
 0.3516
P652 UNII 57,112
 0.4205
P3117 DSSTox substance ID 52,678
 0.0571
P8494 DSSTOX compound identifier 52,275
 0.0568
P592 ChEMBL ID 49,057
 0.3897
P232 EC number 30,459
 0.2034
P2566 ECHA InfoCard ID 30,323
 0.2024
P1579 Reaxys registry number 18,573
 0.1482
P3636 PDB ligand ID 18,134
 0.1409
P638 PDB structure ID 17,069
 0.1271
P665 KEGG ID 14,735
 0.1134
P2840 NSC number 14,457
 0.0652
P646 Freebase ID 14,225
 0.0031
P6366 Microsoft Academic ID 12,144
 0.0318
P7049 AICS Chemical ID (former scheme) 10,962
 0.0842
P715 DrugBank ID 10,903
 0.0865
P4964 SPLASH 7,607
 0.0609
P595 Guide to Pharmacology Ligand ID 6,632
 0.0529
P2063 LIPID MAPS ID 6,582
 0.0464
P3345 RxNorm ID 6,519
 0.0512
P2671 Google Knowledge Graph ID 6,305
 0.0008
P486 MeSH descriptor ID 6,190
 0.0398
P6689 MassBank accession ID 6,119
 0.0472
P2057 Human Metabolome Database ID 5,908
 0.0473
P679 ZVG number 5,688
 0.0451
P2062 HSDB ID 5,240
 0.0419
P2064 KNApSAcK ID 4,131
 0.0331
P3073 CosIng number 4,028
 0.0320
P10283 OpenAlex ID 3,388
 0.0153
P1578 Gmelin number 2,915
 0.0233
P2115 NDF-RT ID 2,864
 0.0229
P267 ATC code 2,780
 0.0221
P4168 IEDB Epitope ID 2,505
 0.0200
P2892 UMLS CUI 2,498
 0.0170
P8691 SwissLipids identifier 2,497
 0.0179
P7025 HCIS ID 2,399
 0.0190
P8072 CAB ID 1,988
 0.0108
P9066 FL number 1,892
 0.0151
P657 RTECS number 1,613
 0.0129
P5220 ICSC ID 1,520
 0.0122
P1417 Encyclopædia Britannica Online ID 1,426
 0.0048
P9557 JECFA number 1,413
 0.0113
P5076 Römpp online ID 1,240
 0.0099
P8408 KBpedia ID 1,165
 0.0072
P672 MeSH tree code 1,123
 0.0080
P10245 MedlinePlus drug identifier 1,057
 0.0085

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P652 UNII 57,112
 0.4205
P592 ChEMBL ID 49,057
 0.3897
P683 ChEBI ID 60,490
 0.3516
P232 EC number 30,459
 0.2034
P2566 ECHA InfoCard ID 30,323
 0.2024
P1579 Reaxys registry number 18,573
 0.1482
P3636 PDB ligand ID 18,134
 0.1409
P638 PDB structure ID 17,069
 0.1271
P662 PubChem CID 121,329
 0.1257
P665 KEGG ID 14,735
 0.1134
P235 InChIKey 124,216
 0.0950
P234 InChI 122,245
 0.0939
P715 DrugBank ID 10,903
 0.0865
P7049 AICS Chemical ID (former scheme) 10,962
 0.0842
P231 CAS Registry Number 74,671
 0.0753
P2840 NSC number 14,457
 0.0652
P4964 SPLASH 7,607
 0.0609
P3117 DSSTox substance ID 52,678
 0.0571
P8494 DSSTOX compound identifier 52,275
 0.0568
P595 Guide to Pharmacology Ligand ID 6,632
 0.0529
P3345 RxNorm ID 6,519
 0.0512
P2057 Human Metabolome Database ID 5,908
 0.0473
P6689 MassBank accession ID 6,119
 0.0472
P2063 LIPID MAPS ID 6,582
 0.0464
P679 ZVG number 5,688
 0.0451
P2062 HSDB ID 5,240
 0.0419
P486 MeSH descriptor ID 6,190
 0.0398
P2064 KNApSAcK ID 4,131
 0.0331
P3073 CosIng number 4,028
 0.0320
P6366 Microsoft Academic ID 12,144
 0.0318
P1578 Gmelin number 2,915
 0.0233
P2115 NDF-RT ID 2,864
 0.0229
P267 ATC code 2,780
 0.0221
P4168 IEDB Epitope ID 2,505
 0.0200
P7025 HCIS ID 2,399
 0.0190
P8691 SwissLipids identifier 2,497
 0.0179
P2892 UMLS CUI 2,498
 0.0170
P10283 OpenAlex ID 3,388
 0.0153
P9066 FL number 1,892
 0.0151
P657 RTECS number 1,613
 0.0129
P5220 ICSC ID 1,520
 0.0122
P9557 JECFA number 1,413
 0.0113
P8072 CAB ID 1,988
 0.0108
P5076 Römpp online ID 1,240
 0.0099
P10245 MedlinePlus drug identifier 1,057
 0.0085
P672 MeSH tree code 1,123
 0.0080
P8408 KBpedia ID 1,165
 0.0072
P8121 UM-BBD compound ID 820
 0.0066
P7524 CA PROP 65 ID 783
 0.0063
P1417 Encyclopædia Britannica Online ID 1,426
 0.0048