| 1 | 684-00-4 | 1,2-DICHLOROETHYLTRICHLOROSILANE | C2H3Cl5Si | 232.4 | | |
| 2 | 684-07-1 | 3,3,3-Trifluorolactic acid | C3H3F3O3 | 144.05 | 68-69°C | Soluble in water. |
| 3 | 684-10-6 | TRIFLUOROETHENESULFONYL FLUORIDE | C2F4O2S | 164.08 | | |
| 4 | 684-16-2 | Hexafluoroacetone | C3F6O | 166.02 | −129°C(lit.) | |
| 5 | 684-19-5 | Ditert-butyl(oxo)phosphanium | C8H19OP | 162.21 | 74-82℃ | |
| 6 | 684-20-8 | NISTC684208 | C3H3F6Sb | 274.8063392 | | |
| 7 | 684-29-7 | Propane, 1,1,1,3,3,3-hexafluoro-2-isocyanato- | C4HF6NO | 193.0472592 | | |
| 8 | 684-31-1 | Demethyltrichlorfon | C3H6Cl3O4P | 243.41 | | |
| 9 | 684-55-9 | Trichlorodiethylamido titanium | C4H8Cl3N2O2Ti | 270.34452 | | |
| 10 | 684-73-1 | 1,1,1-Trifluoro-2-hexylamine | C6H12F3N | 155.16 | | |
| 11 | 684-76-4 | 5,5,5-Trifluoro-4-oxopentanoic Acid | C5H5F3O3 | 170.09 | | |
| 12 | 684-78-6 | O,N-bis(trifluoroacetyl)hydroxylamine | C4HF6NO3 | 225.05 | 59-60°C | |
| 13 | 684-84-4 | 2-methylbutane-1,3-diol | C5H12O2 | 104.15 | 50.86°C (estimate) | |
| 14 | 684-88-8 | N-hydroxyisobutyrimidoyl chloride | C4H8ClNO | 121.565 | | |
| 15 | 684-91-3 | 1-Nitro-1,2-dibromoethane | C2H3Br2NO2 | 232.86 | | |
| 16 | 684-92-4 | Urea, N-formyl-N-hydroxy- | C2H4N2O3 | 104.06 | | |
| 17 | 684-93-5 | Methylnitrosourea | C2H5N3O2 | 103.08 | 124 | Soluble. <0.1 g/100 mL at 18 C |
| 18 | 684-94-6 | 3,4-Dimethyl-3-penten-2-one | C7H12O | 112.17 | | |