As of 2022-03-07, the Wikidata property RTECS number (P657) is used on 1,707 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
P31 instance of 1,693
 0.0000
P231 CAS Registry Number 1,690
 0.0018
P3117 DSSTox substance ID 1,654
 0.0019
P232 EC number 1,649
 0.0297
P2566 ECHA InfoCard ID 1,648
 0.0297
P274 chemical formula 1,647
 0.0016
P2067 mass 1,633
 0.0049
P235 InChIKey 1,630
 0.0012
P662 PubChem CID 1,627
 0.0017
P234 InChI 1,624
 0.0012
P661 ChemSpider ID 1,613
 0.0129
P233 canonical SMILES 1,608
 0.0018
P8494 DSSTOX compound identifier 1,602
 0.0019
P652 UNII 1,585
 0.0232
P646 Freebase ID 1,543
 0.0003
P6366 Microsoft Academic ID 1,496
 0.0055
P7049 AICS Chemical ID (former scheme) 1,351
 0.0805
P679 ZVG number 1,312
 0.1738
P117 chemical structure 1,254
 0.0758
P2062 HSDB ID 1,204
 0.1930
P683 ChEBI ID 1,191
 0.0110
P592 ChEMBL ID 1,091
 0.0214
P2101 melting point 1,003
 0.0314
P2840 NSC number 946
 0.0084
P373 Commons category 932
 0.0003
P527 has part or parts 930
 0.0014
P5220 ICSC ID 911
 0.3724
P1579 Reaxys registry number 875
 0.0436
P10283 OpenAlex ID 795
 0.0079
P4952 safety classification and labelling 764
 0.3246
P665 KEGG ID 762
 0.0364
P4964 SPLASH 739
 0.0847
P7025 HCIS ID 716
 0.1530
P2054 density 683
 0.2705
P6689 MassBank accession ID 669
 0.0557
P1542 has effect 648
 0.1279
P1931 NIOSH Pocket Guide ID 646
 0.3637
P486 MeSH descriptor ID 607
 0.0159
P2119 vapor pressure 582
 0.3314
P2102 boiling point 571
 0.2784
P2404 time-weighted average exposure limit 536
 0.3075
P1578 Gmelin number 535
 0.1250
P3345 RxNorm ID 514
 0.0494
P1417 Encyclopædia Britannica Online ID 505
 0.0029
P703 found in taxon 496
 0.0002
P3073 CosIng number 483
 0.0766
P2868 subject has role 465
 0.0014
P715 DrugBank ID 425
 0.0315
P227 GND ID 420
 0.0003
P8408 KBpedia ID 404
 0.0102

Closest properties by Jaccard index

IDLabelIntersection cardinalityJaccard index
P5220 ICSC ID 911
 0.3724
P1931 NIOSH Pocket Guide ID 646
 0.3637
P2119 vapor pressure 582
 0.3314
P4952 safety classification and labelling 764
 0.3246
P2404 time-weighted average exposure limit 536
 0.3075
P2102 boiling point 571
 0.2784
P2054 density 683
 0.2705
P2129 immediately dangerous to life or health 377
 0.2184
P2128 flash point 354
 0.2003
P695 UN number 360
 0.1945
P2177 solubility 343
 0.1931
P2062 HSDB ID 1,204
 0.1930
P679 ZVG number 1,312
 0.1738
P2260 ionization energy 284
 0.1652
P7025 HCIS ID 716
 0.1530
P1542 has effect 648
 0.1279
P1578 Gmelin number 535
 0.1250
P2202 lower flammable limit 212
 0.1238
P8224 molecular model or crystal lattice model 369
 0.1214
P5076 Römpp online ID 329
 0.1126
P7524 CA PROP 65 ID 253
 0.1107
P2203 upper flammable limit 178
 0.1040
P2405 ceiling exposure limit 171
 0.0997
P4964 SPLASH 739
 0.0847
P8121 UM-BBD compound ID 202
 0.0829
P7049 AICS Chemical ID (former scheme) 1,351
 0.0805
P3073 CosIng number 483
 0.0766
P2407 short-term exposure limit 131
 0.0766
P117 chemical structure 1,254
 0.0758
P3078 standard enthalpy of formation 117
 0.0637
P6689 MassBank accession ID 669
 0.0557
P2107 decomposition point 98
 0.0536
P2057 Human Metabolome Database ID 400
 0.0535
P1987 MCN code 119
 0.0516
P2115 NDF-RT ID 241
 0.0514
P1117 pKa 92
 0.0505
P3345 RxNorm ID 514
 0.0494
P1109 refractive index 88
 0.0492
P628 E number 100
 0.0457
P9066 FL number 172
 0.0437
P1579 Reaxys registry number 875
 0.0436
P8491 AHECC 2017 ID 77
 0.0431
P9557 JECFA number 132
 0.0419
P1820 Open Food Facts food additive ID 74
 0.0374
P2085 Nikkaji ID 83
 0.0373
P665 KEGG ID 762
 0.0364
P4852 JECFA database ID 75
 0.0342
P2240 median lethal dose (LD50) 59
 0.0341
P715 DrugBank ID 425
 0.0315
P2101 melting point 1,003
 0.0314