| 20740-36-7 | osmium(6+) hexacyanide | C6N6 Os . 4 K |
| 20740-45-8 | dihydrogen hexaiodoplatinate | H. 1/2 I6 Pt |
| 20740-78-7 | Ferrohortonolite ((Fe0.7-0.9Mg0.1-0.3)2SiO4) [34802-83-0] Hortonolite ((Fe0.5-0.7Mg0.3-0.5)2SiO4) |
| 20740-98-1 | SODIUM METAVANADATE HYDRATE | H2O . x Na . x O3 V |