Trihalomethane Table of common trihalomethanes Common trihalomethanes (ordered by 
 molecular weight 
 )

| Molecular_formula | IUPAC_name | CAS_registry_number | Common_name | Other_names |
|---|---|---|---|---|
| CHF 3 | trifluoromethane | 75-46-7 | fluoroform | Freon 23, R-23, HFC-23 |
| CHClF 2 | chlorodifluoromethane | 75-45-6 | chlorodifluoromethane | R-22, HCFC-22 |
| CHCl 3 | trichloromethane | 67-66-3 | chloroform | methyl trichloride |
| CHBrCl 2 | bromodichloromethane | 75-27-4 | bromodichloromethane | dichlorobromomethane, BDCM |
| CHBr 2 Cl | dibromochloromethane | 124-48-1 | dibromochloromethane | chlorodibromomethane, CDBM |
| CHBr 3 | tribromomethane | 75-25-2 | bromoform | methyl tribromide |
| CHI 3 | triiodomethane | 75-47-8 | iodoform | methyl triiodide |