在化學上，用以描述化學試劑的危險性。這些風險短語代碼具有以下意思[1]：
| Risk Phrases | 英文解釋 | 中文解釋 |
| 1 | Explosive when dry. | 乾燥時有爆炸性； |
| 2 | Risk of explosion by shock, friction, fire or other sources of ignition. | 受衝擊、摩擦、著火或其他引燃源有爆炸危險； |
| 3 | Extreme risk of explosion by shock, friction, fire or other sources of ignition. | 受衝擊、摩擦、著火或其他引燃源有極高爆炸危險； |
| 4 | Forms very sensitive explosive metallic compounds. | 生成極敏感的爆炸性金屬化合物； |
| 5 | Heating may cause an explosion. | 受熱可能引起爆炸； |
| 6 | Explosive with or without contact with air. | 與空氣或未與空氣接觸發生爆炸； |
| 7 | May cause fire. | 可能引起火災； |
| 8 | Contact with combustible material may cause fire. | 與可燃物料接觸可能引起火災； |
| 9 | Explosive when mixed with combustible material. | 與可燃物料混合時發生爆炸； |
| 10 | Flammable. | 易燃的； |
| 11 | Highly flammable. | 高度易燃的； |
| 12 | Extremely flammable. | 極易燃的； |
| 14 | Reacts violently with water. | 與水猛烈反應； |
| 14/15 | Reacts violently with water, liberating highly flammable gases. | 與水猛烈反應，釋放出極易燃氣體； |
| 15 | Contact with water liberates extremely flammable gases. | 與水接觸釋放出極易燃氣體； |
| 15/29 | Contact with water liberates toxic, highly flammable gas. | 與水接觸釋放出有毒的，極易燃氣體； |
| 16 | Explosive when mixed with oxidizing substances. | 與氧化性物質混合時發生爆炸； |
| 17 | Spontaneously flammable in air. | 在空氣中易自燃； |
| 18 | In use, may form flammable/explosive vapour-air mixture. | 使用中可能形成易燃/爆炸性蒸氣空氣混合物； |
| 19 | May form explosive peroxides. | 可能生成爆炸性過氧化物； |
| 20 | Harmful by inhalation. | 吸入有害； |
| 20/21 | Harmful by inhalation and in contact with skin. | 吸入和與皮膚接觸是有害的； |
| 20/21/22 | Harmful by inhalation, in contact with skin and if swallowed. | 吸入、與皮膚接觸和吞食是有害的； |
| 20/22 | Harmful by inhalation and if swallowed. | 吸入和吞食是有害的； |
| 21 | Harmful in contact with skin. | 與皮膚接觸是有害的； |
| 21/22 | Harmful in contact with skin and if swallowed. | 與皮膚接觸和吞食是有毒的； |
| 22 | Harmful if swallowed. | 吞食是有害的； |
| 23 | Toxic by inhalation. | 吸入有害； |
| 23/24 | Toxic by inhalation and in contact with skin. | 吸入和與皮膚接觸是有毒的； |
| 23/24/25 | Toxic by inhalation, in contact with skin and if swallowed. | 吸入、與皮膚接觸和吞食是有毒的； |
| 23/25 | Toxic by inhalation and if swallowed. | 吸入和吞食是有毒的； |
| 24 | Toxic in contact with skin. | 與皮膚接觸有毒； |
| 24/25 | Toxic in contact with skin and if swallowed. | 與皮膚接觸和吞食是有毒的； |
| 25 | Toxic if swallowed. | 吞食有毒； |
| 26 | Very toxic by inhalation. | 吸入有極高毒性； |
| 26/27 | Very toxic by inhalation and in contact with skin. | 吸入和與皮膚接觸有極高毒性； |
| 26/27/28 | Very toxic by inhalation, in contact with skin and if swallowed. | 吸入、與皮膚接觸和吞食有極高毒性； |
| 26/28 | Very toxic by inhalation and if swallowed. | 吸入和吞食有極高毒性； |
| 27 | Very toxic in contact with skin. | 與皮膚接觸有極高毒性； |
| 27/28 | Very toxic in contact with skin and if swallowed. | 與皮膚接觸和吞食有極高毒性； |
| 28 | Very toxic if swallowed. | 吞食有極高毒性； |
| 29 | Contact with water liberates toxic gas. | 與水接觸釋放出有毒氣體； |
| 30 | Can become highly flammable in use. | 使用會變為高度易燃的； |
| 31 | Contact with acids liberates toxic gas. | 與酸接觸釋放出有毒氣體； |
| 32 | Contact with acids liberates very toxic gas. | 與酸接觸釋放出極高毒性氣體； |
| 33 | Danger of cumulative effects. | 有累積作用危險； |
| 34 | Causes burns. | 引起灼傷； |
| 35 | Causes severe burns. | 引起嚴重灼傷； |
| 36 | Irritating to eyes. | 刺激眼睛； |
| 36/37 | Irritating to eyes and respiratory system. | 刺激眼睛和呼吸系統； |
| 36/37/38 | Irritating to eyes, respiratory system and skin. | 刺激眼睛、呼吸系統和皮膚； |
| 36/38 | Irritating to eyes and skin. | 刺激眼睛和皮膚； |
| 37 | Irritating to respiratory system. | 刺激呼吸系統； |
| 37/38 | Irritating to respiratory system and skin. | 刺激呼吸系統和皮膚； |
| 38 | Irritating to skin. | 刺激皮膚； |
| 39 | Danger of very serious irreversible effects. | 有極嚴重不可逆作用危險； |
| 39/23 | Toxic : danger of very serious irreversible effects through inhalation. | 有毒的：經吸入有極嚴重不可逆作用危險； |
| 39/23/24 | Toxic : danger of very serious irreversible effects through inhalation and in contact with skin. | 有毒的：經吸入和與皮膚接觸有極嚴重不可逆作用危險； |
| 39/23/24/25 | Toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. | 有毒的：經吸入、與皮膚接觸和吞食有極嚴重不可逆作用危險； |
| 39/23/25 | Toxic : danger of very serious irreversible effects through inhalation and if swallowed. | 有毒的：經吸入和吞食有極嚴重不可逆作用危險； |
| 39/24 | Toxic : danger of very serious irreversible effects in contact with skin. | 有毒的：與皮膚接觸有極嚴重不可逆作用危險； |
| 39/24/25 | Toxic : danger of very serious irreversible effects in contact with skin and if swallowed. | 有毒的：與皮膚接觸和吞食有極嚴重不可逆作用危險； |
| 39/25 | Toxic : danger of very serious irreversible effects if swallowed. | 有毒的：吞食有極嚴重不可逆作用危險； |
| 39/26 | Very toxic : danger of very serious irreversible effects through inhalation. | 極高毒性：經吸入有極嚴重不可逆作用危險； |
| 39/26/27 | Very toxic : danger of very serious irreversible effects through inhalation and in contact with skin. | 極高毒性：經吸入和與皮膚接觸有極嚴重不可逆作用危險； |
| 39/26/27/28 | Very toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. | 極高毒性：經吸入、與皮膚接觸和吞食有極嚴重不可逆作用危險； |
| 39/26/28 | Very toxic : danger of very serious irreversible effects through inhalation and if swallowed. | 極高毒性：經吸入和吞食有極嚴重不可逆作用危險； |
| 39/27 | Very toxic : danger of very serious irreversible effects in contact with skin. | 極高毒性：與皮膚接觸有極嚴重不可逆作用危險； |
| 39/27/28 | Very toxic : danger of very serious irreversible effects in contact with skin and if swallowed. | 極高毒性：與皮膚接觸和吞食有極嚴重不可逆作用危險； |
| 39/28 | Very toxic : danger of very serious irreversible effects if swallowed. | 極高毒性：吞食有極嚴重不可逆作用危險； |
| 40 | Possible risks of irreversible effects. | 可能有不可逆作用的風險； |
| R40/20 | Harmful : possible risk of irreversible effects through inhalation. | 有害的：經吸入可能有不可逆作用的風險； |
| R40/20/21 | Harmful : possible risk of irreversible effects through inhalation and in contact with skin. | 有害的：經吸入和與皮膚接觸可能有不可逆作用的風險； |
| R40/20/21/22 | Harmful : possible risk of irreversible effects through inhalation, in contact with skin and if swallowed. | 有害的：經吸入、與皮膚接觸和吞食可能有不可逆作用的風險； |
| R40/20/22 | Harmful : possible risk of irreversible effects through inhalation and if swallowed. | 有害的：經吸入和吞食可能有不可逆作用的風險； |
| R40/21 | Harmful : possible risk of irreversible effects in contact with skin. | 有害的：與皮膚接觸可能有不可逆作用的風險； |
| R40/21/22 | Harmful : possible risk of irreversible effects in contact with skin and if swallowed. | 有害的：與皮膚接觸和吞食可能有不可逆作用的風險； |
| R40/22 | Harmful : possible risk of irreversible effects if swallowed | 有害的：吞食可能有不可逆作用的風險； |
| R41 | Risk of serious damage to eyes. | 對眼睛有嚴重損害的風險； |
| R42 | May cause sensitization by inhalation. | 吸入可能引起過敏； |
| R42/43 | May cause sensitization by inhalation and skin contact. | 吸入和皮膚接觸可能引起過敏； |
| R43 | May cause sensitization by skin contact. | 皮膚接觸可能引起過敏； |
| R44 | Risk of explosion if heated under confinement. | 在封閉情況下加熱有爆炸危險； |
| R45 | May cause cancer. | 可能致癌； |
| R46 | May cause heritable genetic damage. | 可能造成不可逆的遺傳損害 |
| R47 | May cause birth defects. | 可能引起出生缺陷； |
| R48 | Danger of serious damage to health by prolonged exposure. | 長期接觸有嚴重損害健康的危險； |
| R48/20 | Harmful : danger of serious damage to health by prolonged exposure through inhalation. | 有害的：經吸入長期接觸有嚴重損害健康的危險； |
| R48/20/21 | Harmful : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin. | 有害的：經吸入和與皮膚長期接觸有嚴重損害健康的危險； |
| R48/20/21/22 | Harmful : danger of serious damage to health by prolonged exposure through inh.,in contact with skin and if swallowed | 有害的：經吸入、皮膚和吞食長期接觸有嚴重損害健康的危險； |
| R48/20/22 | Harmful : danger of serious damage to health by prolonged exposure through inhalation and if swallowed. | 有害的：經吸入和吞食長期接觸有嚴重損害健康的危險； |
| R48/21 | Harmful : danger of serious damage to health by prolonged exposure in contact with skin. | 有害的：經皮膚長期接觸有嚴重損害健康的危險； |
| R48/21/22 | Harmful : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed. | 有害的：經皮膚和吞食長期接觸有嚴重損害健康的危險； |
| R48/22 | Harmful : danger of serious damage to health by prolonged exposure if swallowed. | 有害的：吞食長期接觸有嚴重損害健康的危險； |
| R48/23 | Toxic : danger of serious damage to health by prolonged exposure through inhalation. | 有毒的：經吸入長期接觸有嚴重損害健康的危險； |
| R48/23/24 | Toxic : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin. | 有毒的：經吸入和與皮膚長期接觸有嚴重損害健康的危險； |
| R48/23/24/25 | Toxic : danger of serious damage to health by prolonged exposure through inh.,in contact with skin and if swallowed | 有毒的：經吸入、皮膚和吞食長期接觸有嚴重損害健康的危險； |
| R48/23/25 | Toxic : danger of serious damage to health by prolonged exposure through inhalation and if swallowed. | 有毒的：經吸入和吞食長期接觸有嚴重損害健康的危險； |
| R48/24 | Toxic : danger of serious damage to health by prolonged exposure in contact with skin. | 有毒的：經皮膚長期接觸有嚴重損害健康的危險； |
| R48/24/25 | Toxic : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed. | 有毒的：經皮膚和吞食長期接觸有嚴重損害健康的危險； |
| R48/25 | Toxic : danger of serious damage to health by prolonged exposure if swallowed. | 有毒的：吞食長期接觸有嚴重損害健康的危險； |
| R49 | May cause cancer by inhalation. | 吸入可能致癌； |
| R50 | Very toxic to aquatic organisms. | 對水生生物有極高毒性； |
| R50/53 | Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. | 對水生生物有極高毒性，可能在水生環境中造成長期不利影響； |
| R51 | Toxic to aquatic organisms. | 對水生生物是有毒的； |
| R51/53 | Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. | 對水生生物有毒，可能在水生環境中造成長期不利影響； |
| R52 | Harmful to aquatic organisms. | 對水生生物是有害的； |
| R52/53 | Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. | 對水生生物有害，可能在水生環境中造成長期不利影響； |
| R53 | May cause long-term adverse effects in aquatic environment. | 可能在水生環境中造成長期不利影響； |
| R54 | Toxic to flora. | 對植物群有毒； |
| R55 | Toxic to fauna. | 對動物群有毒； |
| R56 | Toxic to soil organisms. | 對土壤中生物有毒； |
| R57 | Toxic to bees. | 對蜜蜂有毒； |
| R58 | May cause long-term adverse effects in the environment. | 可能在環境中造成長期不利影響； |
| R59 | Dangerous for the ozon layer. | 對臭氧層有危害； |
| R60 | May impair fertility. | 可能損傷生育力； |
| R61 | May cause harm to the unborn child. | 可能對未出生嬰兒造成危害； |
| R62 | Possible risk of impaired fertility. | 可能有損傷生育力的危險； |
| R63 | Possible risk of harm to the unborn child. | 可能有損害未出生嬰兒的危險； |
| R64 | May cause harm to breastfed babies. | 可能對哺乳嬰兒造成危害； |
| R65 | Harmfull may cause lung damage if swallowed |
