| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Toxic effect of hydrocarbon gas | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Inhalation of formalin fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of carbon monoxide | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of polyester fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of sulfur dioxide | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of phosgene | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Oxygen toxicity | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of hydrocyanic acid gas | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of nitrogen oxide | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of brass fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of freon | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Arsine poisoning | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of lacrimogenic gas | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of chlorine gas | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of fluorine gas and hydrogen fluoride | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of hydrogen sulfide | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of carbon dioxide | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Other gas, fume or vapour causing toxic effect | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| [X]Toxic effects of other specified gases, fumes and vapours | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Gases, fumes or vapours causing toxic effect NOS | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Gas/fume NOS - toxic effect | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Respiratory condition caused by chemical fumes AND/OR vapors | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Inhalation of formalin fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of nitrous fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Poisoning caused by fumes | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Poisoning caused by vapor | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| [X]Toxic effects of other specified gases, fumes and vapours | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Gases, fumes or vapours causing toxic effect NOS | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Other gas, fume or vapour causing toxic effect | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  | 
| Gas/fume NOS - toxic effect | Is a | False | Toxic effect of gas, fumes AND/OR vapors | Inferred relationship | Existential restriction modifier |  |