在化学上，用以描述化学试剂的危险性。这些风险短语代码具有以下意思：

1 Explosive when dry. 干燥时有爆炸性；

2 Risk of explosion by shock, friction, fire or other sources of ignition. 受冲击、摩擦、着火或其他引燃源有爆炸危险；

3 Extreme risk of explosion by shock, friction, fire or other sources of ignition. 受冲击、摩擦、着火或其他引燃源有极高爆炸危险；

4 Forms very sensitive explosive metallic compounds. 生成极敏感的爆炸性金属化合物；

5 Heating may cause an explosion. 受热可能引起爆炸；

6 Explosive with or without contact with air. 与空气或未与空气接触发生爆炸；

7 May cause fire. 可能引起火灾；

8 Contact with combustible material may cause fire. 与可燃物料接触可能引起火灾；

9 Explosive when mixed with combustible material. 与可燃物料混合时发生爆炸；

10 Flammable. 易燃的；

11 Highly flammable. 高度易燃的；

12 Extremely flammable. 极易燃的；

14 Reacts violently with water. 与水猛烈反应；

14/15 Reacts violently with water, liberating highly flammable gases. 与水猛烈反应，释放出极易燃气体；

15 Contact with water liberates extremely flammable gases. 与水接触释放出极易燃气体；

15/29 Contact with water liberates toxic, highly flammable gas. 与水接触释放出有毒的，极易燃气体；

16 Explosive when mixed with oxidizing substances. 与氧化性物质混合时发生爆炸；

17 Spontaneously flammable in air. 在空气中易自燃；

18 In use, may form flammable/explosive vapour-air mixture. 使用中可能形成易燃/爆炸性蒸气空气混合物；

19 May form explosive peroxides. 可能生成爆炸性过氧化物；

20 Harmful by inhalation. 吸入有害；

20/21 Harmful by inhalation and in contact with skin. 吸入和与皮肤接触是有害的；

20/21/22 Harmful by inhalation, in contact with skin and if swallowed. 吸入、与皮肤接触和吞食是有害的；

20/22 Harmful by inhalation and if swallowed. 吸入和吞食是有害的；

21 Harmful in contact with skin. 与皮肤接触是有害的；

21/22 Harmful in contact with skin and if swallowed. 与皮肤接触和吞食是有毒的；

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. 吸入和与皮肤接触是有毒的；

23/24/25 Toxic by inhalation, in contact with skin and if swallowed. 吸入、与皮肤接触和吞食是有毒的；

23/25 Toxic by inhalation and if swallowed. 吸入和吞食是有毒的；

24 Toxic in contact with skin. 与皮肤接触有毒；

24/25 Toxic in contact with skin and if swallowed. 与皮肤接触和吞食是有毒的；

25 Toxic if swallowed. 吞食有毒；

26 Very toxic by inhalation. 吸入有极高毒性；

26/27 Very toxic by inhalation and in contact with skin. 吸入和与皮肤接触有极高毒性；

26/27/28 Very toxic by inhalation, in contact with skin and if swallowed. 吸入、与皮肤接触和吞食有极高毒性；

26/28 Very toxic by inhalation and if swallowed. 吸入和吞食有极高毒性；

27 Very toxic in contact with skin. 与皮肤接触有极高毒性；

27/28 Very toxic in contact with skin and if swallowed. 与皮肤接触和吞食有极高毒性；

28 Very toxic if swallowed. 吞食有极高毒性；

29 Contact with water liberates toxic gas. 与水接触释放出有毒气体；

30 Can become highly flammable in use. 使用会变为高度易燃的；

31 Contact with acids liberates toxic gas. 与酸接触释放出有毒气体；

32 Contact with acids liberates very toxic gas. 与酸接触释放出极高毒性气体；

33 Danger of cumulative effects. 有累积作用危险；

34 Causes burns. 引起灼伤；

35 Causes severe burns. 引起严重灼伤；

36 Irritating to eyes. 刺激眼睛；

36/37 Irritating to eyes and respiratory system. 刺激眼睛和呼吸系统；

36/37/38 Irritating to eyes, respiratory system and skin. 刺激眼睛、呼吸系统和皮肤；

36/38 Irritating to eyes and skin. 刺激眼睛和皮肤；

37 Irritating to respiratory system. 刺激呼吸系统；

37/38 Irritating to respiratory system and skin. 刺激呼吸系统和皮肤；

38 Irritating to skin. 刺激皮肤；

39 Danger of very serious irreversible effects. 有极严重不可逆作用危险；

39/23 Toxic : danger of very serious irreversible effects through inhalation. 有毒的：经吸入有极严重不可逆作用危险；

39/23/24 Toxic : danger of very serious irreversible effects through inhalation and in contact with skin. 有毒的：经吸入和与皮肤接触有极严重不可逆作用危险；

39/23/24/25 Toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. 有毒的：经吸入、与皮肤接触和吞食有极严重不可逆作用危险；

39/23/25 Toxic : danger of very serious irreversible effects through inhalation and if swallowed. 有毒的：经吸入和吞食有极严重不可逆作用危险；

39/24 Toxic : danger of very serious irreversible effects in contact with skin. 有毒的：与皮肤接触有极严重不可逆作用危险；

39/24/25 Toxic : danger of very serious irreversible effects in contact with skin and if swallowed. 有毒的：与皮肤接触和吞食有极严重不可逆作用危险；

39/25 Toxic : danger of very serious irreversible effects if swallowed. 有毒的：吞食有极严重不可逆作用危险；

39/26 Very toxic : danger of very serious irreversible effects through inhalation. 极高毒性：经吸入有极严重不可逆作用危险；

39/26/27 Very toxic : danger of very serious irreversible effects through inhalation and in contact with skin. 极高毒性：经吸入和与皮肤接触有极严重不可逆作用危险；

39/26/27/28 Very toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. 极高毒性：经吸入、与皮肤接触和吞食有极严重不可逆作用危险；

39/26/28 Very toxic : danger of very serious irreversible effects through inhalation and if swallowed. 极高毒性：经吸入和吞食有极严重不可逆作用危险；

39/27 Very toxic : danger of very serious irreversible effects in contact with skin. 极高毒性：与皮肤接触有极严重不可逆作用危险；

39/27/28 Very toxic : danger of very serious irreversible effects in contact with skin and if swallowed. 极高毒性：与皮肤接触和吞食有极严重不可逆作用危险；

39/28 Very toxic : danger of very serious irreversible effects if swallowed. 极高毒性：吞食有极严重不可逆作用危险；

40 Possible risks of irreversible effects. 可能有不可逆作用的风险；

R40/20 Harmful : possible risk of irreversible effects through inhalation. 有害的：经吸入可能有不可逆作用的风险；

R40/20/21 Harmful : possible risk of irreversible effects through inhalation and in contact with skin. 有害的：经吸入和与皮肤接触可能有不可逆作用的风险；

R40/20/21/22 Harmful : possible risk of irreversible effects through inhalation, in contact with skin and if swallowed. 有害的：经吸入、与皮肤接触和吞食可能有不可逆作用的风险；

R40/20/22 Harmful : possible risk of irreversible effects through inhalation and if swallowed. 有害的：经吸入和吞食可能有不可逆作用的风险；

R40/21 Harmful : possible risk of irreversible effects in contact with skin. 有害的：与皮肤接触可能有不可逆作用的风险；

R40/21/22 Harmful : possible risk of irreversible effects in contact with skin and if swallowed. 有害的：与皮肤接触和吞食可能有不可逆作用的风险；

R40/22 Harmful : possible risk of irreversible effects if swallowed 有害的：吞食可能有不可逆作用的风险；

R41 Risk of serious damage to eyes. 对眼睛有严重损害的风险；

R42 May cause sensitization by inhalation. 吸入可能引起过敏；

R42/43 May cause sensitization by inhalation and skin contact. 吸入和皮肤接触可能引起过敏；

R43 May cause sensitization by skin contact. 皮肤接触可能引起过敏；

R44 Risk of explosion if heated under confinement. 在封闭情况下加热有爆炸危险；

R45 May cause cancer. 可能致癌；

R46 May cause heritable genetic damage. 可能造成不可逆的遗传损害

R47 May cause birth defects. 可能引起出生缺陷；

R48 Danger of serious damage to health by prolonged exposure. 长期接触有严重损害健康的危险；

R48/20 Harmful : danger of serious damage to health by prolonged exposure through inhalation. 有害的：经吸入长期接触有严重损害健康的危险；

R48/20/21 Harmful : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin. 有害的：经吸入和与皮肤长期接触有严重损害健康的危险；

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：经吸入、皮肤和吞食长期接触有严重损害健康的危险；

R48/20/22 Harmful : danger of serious damage to health by prolonged exposure through inhalation and if swallowed. 有害的：经吸入和吞食长期接触有严重损害健康的危险；

R48/21 Harmful : danger of serious damage to health by prolonged exposure in contact with skin. 有害的：经皮肤长期接触有严重损害健康的危险；

R48/21/22 Harmful : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed. 有害的：经皮肤和吞食长期接触有严重损害健康的危险；

R48/22 Harmful : danger of serious damage to health by prolonged exposure if swallowed. 有害的：吞食长期接触有严重损害健康的危险；

R48/23 Toxic : danger of serious damage to health by prolonged exposure through inhalation. 有毒的：经吸入长期接触有严重损害健康的危险；

R48/23/24 Toxic : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin. 有毒的：经吸入和与皮肤长期接触有严重损害健康的危险；

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：经吸入、皮肤和吞食长期接触有严重损害健康的危险；

R48/23/25 Toxic : danger of serious damage to health by prolonged exposure through inhalation and if swallowed. 有毒的：经吸入和吞食长期接触有严重损害健康的危险；

R48/24 Toxic : danger of serious damage to health by prolonged exposure in contact with skin. 有毒的：经皮肤长期接触有严重损害健康的危险；

R48/24/25 Toxic : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed. 有毒的：经皮肤和吞食长期接触有严重损害健康的危险；

R48/25 Toxic : danger of serious damage to health by prolonged exposure if swallowed. 有毒的：吞食长期接触有严重损害健康的危险；

R49 May cause cancer by inhalation. 吸入可能致癌；

R50 Very toxic to aquatic organisms. 对水生生物有极高毒性；

R50/53 Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 对水生生物有极高毒性，可能在水生环境中造成长期不利影响；

R51 Toxic to aquatic organisms. 对水生生物是有毒的；

R51/53 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 对水生生物有毒，可能在水生环境中造成长期不利影响；

R52 Harmful to aquatic organisms. 对水生生物是有害的；

R52/53 Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 对水生生物有害，可能在水生环境中造成长期不利影响；

R53 May cause long-term adverse effects in aquatic environment. 可能在水生环境中造成长期不利影响；

R54 Toxic to flora. 对植物群有毒；

R55 Toxic to fauna. 对动物群有毒；

R56 Toxic to soil organisms. 对土壤中生物有毒；

R57 Toxic to bees. 对蜜蜂有毒；

R58 May cause long-term adverse effects in the environment. 可能在环境中造成长期不利影响；

R59 Dangerous for the ozon layer. 对臭氧层有危害；

R60 May impair fertility. 可能损伤生育力；

R61 May cause harm to the unborn child. 可能对未出生婴儿造成危害；

R62 Possible risk of impaired fertility. 可能有损伤生育力的危险；

R63 Possible risk of harm to the unborn child. 可能有损害未出生婴儿的危险；

R64 May cause harm to breastfed babies. 可能对哺乳婴儿造成危害；

R65 Harmfull may cause lung damage if swallowed 如果吞下了可能导致肺损伤