As of 2022-03-07, the Wikidata property UNII (P652) is used on 68,246 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 58,787
 0.0447
P234 InChI 58,176
 0.0444
P231 CAS Registry Number 58,159
 0.0611
P662 PubChem CID 57,427
 0.0591
P661 ChemSpider ID 57,112
 0.4205
P3117 DSSTox substance ID 40,025
 0.0456
P8494 DSSTOX compound identifier 39,239
 0.0447
P232 EC number 27,023
 0.2793
P2566 ECHA InfoCard ID 26,834
 0.2769
P592 ChEMBL ID 23,346
 0.2453
P646 Freebase ID 16,417
 0.0037
P683 ChEBI ID 15,526
 0.0967
P6366 Microsoft Academic ID 13,331
 0.0410
P2840 NSC number 11,882
 0.0708
P7049 AICS Chemical ID (former scheme) 10,815
 0.1464
P665 KEGG ID 8,768
 0.1104
P715 DrugBank ID 7,944
 0.1096
P1579 Reaxys registry number 7,541
 0.0944
P3345 RxNorm ID 6,839
 0.0968
P486 MeSH descriptor ID 6,533
 0.0662
P846 GBIF taxon ID 6,499
 0.0025
P4964 SPLASH 6,170
 0.0883
P685 NCBI taxonomy ID 6,098
 0.0094
P3151 iNaturalist taxon ID 5,871
 0.0066
P679 ZVG number 5,503
 0.0787
P2671 Google Knowledge Graph ID 5,464
 0.0007
P2062 HSDB ID 5,384
 0.0785
P6689 MassBank accession ID 5,255
 0.0711
P5055 IRMNG ID 5,000
 0.0035
P815 ITIS TSN 4,957
 0.0073
P3073 CosIng number 4,336
 0.0629
P10283 OpenAlex ID 4,151
 0.0253
P830 Encyclopedia of Life ID 4,087
 0.0035
P9157 Open Tree of Life ID 3,823
 0.0065
P595 Guide to Pharmacology Ligand ID 3,693
 0.0514
P7715 World Flora Online ID 3,692
 0.0039
P961 IPNI plant ID 3,674
 0.0039
P3636 PDB ligand ID 3,622
 0.0417
P960 Tropicos ID 3,609
 0.0055
P5037 Plants of the World online ID 3,570
 0.0052
P1070 PlantList-ID 3,457
 0.0075
P3031 EPPO Code 3,363
 0.0252
P1417 Encyclopædia Britannica Online ID 3,203
 0.0136
P3186 TAXREF ID 3,121
 0.0119
P2115 NDF-RT ID 3,045
 0.0445
P267 ATC code 3,037
 0.0441
P638 PDB structure ID 2,799
 0.0304
P2057 Human Metabolome Database ID 2,787
 0.0389
P6105 Observation.org ID 2,664
 0.0117
P10243 NatureServe Explorer ID 2,623
 0.0168

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P661 ChemSpider ID 57,112
 0.4205
P232 EC number 27,023
 0.2793
P2566 ECHA InfoCard ID 26,834
 0.2769
P592 ChEMBL ID 23,346
 0.2453
P7049 AICS Chemical ID (former scheme) 10,815
 0.1464
P665 KEGG ID 8,768
 0.1104
P715 DrugBank ID 7,944
 0.1096
P3345 RxNorm ID 6,839
 0.0968
P683 ChEBI ID 15,526
 0.0967
P1579 Reaxys registry number 7,541
 0.0944
P4964 SPLASH 6,170
 0.0883
P679 ZVG number 5,503
 0.0787
P2062 HSDB ID 5,384
 0.0785
P6689 MassBank accession ID 5,255
 0.0711
P2840 NSC number 11,882
 0.0708
P486 MeSH descriptor ID 6,533
 0.0662
P3073 CosIng number 4,336
 0.0629
P231 CAS Registry Number 58,159
 0.0611
P662 PubChem CID 57,427
 0.0591
P595 Guide to Pharmacology Ligand ID 3,693
 0.0514
P3117 DSSTox substance ID 40,025
 0.0456
P8494 DSSTOX compound identifier 39,239
 0.0447
P235 InChIKey 58,787
 0.0447
P2115 NDF-RT ID 3,045
 0.0445
P234 InChI 58,176
 0.0444
P267 ATC code 3,037
 0.0441
P3636 PDB ligand ID 3,622
 0.0417
P6366 Microsoft Academic ID 13,331
 0.0410
P2057 Human Metabolome Database ID 2,787
 0.0389
P7025 HCIS ID 2,345
 0.0337
P638 PDB structure ID 2,799
 0.0304
P2892 UMLS CUI 2,555
 0.0283
P9066 FL number 1,881
 0.0274
P2063 LIPID MAPS ID 2,435
 0.0272
P2064 KNApSAcK ID 1,824
 0.0258
P10283 OpenAlex ID 4,151
 0.0253
P3031 EPPO Code 3,363
 0.0252
P1578 Gmelin number 1,638
 0.0235
P657 RTECS number 1,585
 0.0232
P5220 ICSC ID 1,542
 0.0226
P1772 USDA PLANTS ID 2,504
 0.0222
P9557 JECFA number 1,426
 0.0208
P8072 CAB ID 2,544
 0.0199
P5076 Römpp online ID 1,209
 0.0176
P10245 MedlinePlus drug identifier 1,193
 0.0174
P10243 NatureServe Explorer ID 2,623
 0.0168
P672 MeSH tree code 1,374
 0.0165
P8408 KBpedia ID 1,723
 0.0165
P2004 NALT ID 1,134
 0.0154
P6142 Verspreidingsatlas.nl ID 1,224
 0.0147