许多国家提供的化学品数据表含有标志某种“危险信息”的代码，比如R23、R45 等。，这些危险信息代码中的R是Risk的简称，其具体的中英文含义如下表：

危险代码 (Risk Phrase Codes) 英文解释 中文解释
R1 Explosive when dry 干燥时易爆 
R2 Risk of explosion by shock, friction, fire or other source of ignition 遇到震动、摩擦、火焰或者其它引燃物有爆炸危险 
R3 Extreme risk of explosion by shock, friction, fire or other sources of ignition  遇到震动、摩擦、火焰或者其它引燃物有极端爆炸危险 
R4 Forms very sensitive explosive metallic compounds  生成非常敏感的易爆炸金属化合物 
R5 Heating may cause an explosion  加热会引起爆炸 
R6 Explosive with or without contact with air  接触空气或者未接触空气会爆炸 
R7 May cause fire  会导致起火 
R8 Contact with combustible material may cause fire  遇到易燃物会导致起火 
R9 Explosive when mixed with combustible material  与易燃物混合会爆炸 
R10 Flammable  易燃 
R11  Highly flammable  非常易燃 
R12  Extremely flammable  极端易燃 
R13  Extremely flammable liquefied gas  极端易燃的液化气体 
R14  Reacts violently with water  遇水会猛烈反应 
R15  Contact with water liberates extremely flammable gases  遇水会释放出极端易燃的气体
R16  Explosive when mixed with oxidizing substances  与氧化物质混合会爆炸 
R17  Spontaneously flammable in air  在空气中能够自燃 
R18  In use, may form inflammable/explosive vapour-air mixture  使用时可能生成易燃易爆的蒸汽-空气混合物 
R19  May form explosive peroxides  可能生成易爆的过氧化物质 
R20 Harmful by inhalation  吸入有害 
R21  Harmful in contact with skin  与皮肤接触有害 
R22  Harmful if swallowed  吞咽有害 
R23  Toxic by inhalation  吸入有毒 
R24  Toxic in contact with skin  与皮肤接触有毒 
R25  Toxic if swallowed  吞咽有毒 
R26  Very toxic by inhalation  吸入极毒 
R27  Very toxic in contact with skin  与皮肤接触极毒 
R28  Very toxic if swallowed  吞咽极毒 
R29  Contact with water liberates toxic gas  遇水释放出有毒气体 
R30  Can become highly flammable in use  使用时可能转化为高度易燃物质 
R31   Contact with acids liberates toxic gas  与酸接触释放出有毒气体 
R32   Contact with acid liberates very toxic gas  与酸接触释放出毒性很高的气体 
R33   Danger of cumulative effects   有累积作用的危险
R34   Causes burns  会导致灼伤 
R35    Causes severe burns 会导致严重灼伤 
R36   Irritating to eyes   刺激眼睛
R37   Irritating to respiratory system  刺激呼吸道 
R38   Irritating to skin  刺激皮肤 
R39   Danger of very serious irreversible effects  有非常严重的不可挽回的作用的危险 
R40   Limited evidence of a carcinogenic effect 有限证据表明其致癌作用 
R41   Risk of serious damage to the eyes 有严重损伤眼睛的危险 
R42   May cause sensitization by inhalation 吸入会产生过敏反应 
R43  May cause sensitization by skin contact  皮肤接触会产生过敏反应 
R44  Risk of explosion if heated under confinement   密封下加热有爆炸危险
R45   May cause cancer 可能致癌 
R46  May cause heritable genetic damage  可能引起遗传基因损害 
R47  May cause birth defects  可能引起生殖缺陷 
R48  Danger of serious damage to health by prolonged exposure  长期接触有严重损害健康的危险 
R49   May cause cancer by inhalation  吸入会致癌
R50  Very toxic to aquatic organisms   对水生生物极毒
R51  Toxic to aquatic organisms   对水生生物有毒
R52   Harmful to aquatic organisms 对水生生物有害 
R53  May cause long-term adverse effects in the aquatic environment   对水生环境有长期的有害作用
R54  Toxic to flora  对植物有毒 
R55  Toxic to fauna   对动物有毒
R56   Toxic to soil organisms  对土壤生物有毒
R57   Toxic to bees  对蜜蜂有毒
R58   May cause long-term adverse effects in the environment  对环境可能导致长期有害的作用
R59  Dangerous to the ozone layer   对臭氧层有危害
R60   May impair fertility 可能降低生殖能力 
R61  May cause harm to the unborn child  可能对未出生的婴儿导致伤害 
R62  Risk of impaired fertility   有削弱生殖能力的危险
R63   Possible risk of harm to the unborn child  可能危害未出生婴儿
R64  May cause harm to breastfed babies   可能导致伤害脯乳期婴儿
R65   Harmful: may cause lung damage if swallowed  若吞咽可能伤害肺部器官
R66   Repeated exposure may cause skin dryness or cracking  反复接触可能导致皮肤干燥或皴裂
R67  Vapours may cause drowsiness and dizziness   蒸汽可能导致嗜睡和昏厥
R68  Possible risk of irreversible effects   可能有不可挽回的作用的危险
     
复合危险代码 Combination of particular risks    
R14/15  Reacts violently with water, liberating extremely flammable gas  遇水剧烈反应，释放出高度可燃气体 
R15/29  Contact with water liberates toxic, extremely flammable gas  接触水即释放有毒且高度可燃气体 
R20/21 Harmful by inhalation and in contact with skin  吸入及与皮肤接触有害 
R20/21/22  Harmful by inhalation, in contact with skin and if swallowed  吸入、皮肤接触和不慎吞咽有害 
R20/22   Harmful by inhalation and if swallowed  吸入和不慎吞咽有害 
R21/22  Harmful in contact with skin and if swallowed 皮肤接触和不慎吞咽有害 
R23/24  Toxic by inhalation and in contact with skin   吸入及皮肤接触都有毒
R23/24/25  Toxic by inhalation, in contact with skin and if swallowed  吸入，皮肤接触及吞食都有毒 
R23/25 Toxic by inhalation and if swallowed  吸入及吞食都有毒 
R24/25  Toxic in contact with skin and if swallowed  皮肤接触及吞食都有毒 
R26/27   Very toxic by inhalation and in contact with skin 吸入及皮肤接触都有剧毒 
R26/27/28 Very toxic by inhalation, in contact with skin and if swallowed  吸入，皮肤接触及吞食都有剧毒 
R26/28 Very toxic by inhalation and if swallowed   吸入及吞食都有剧毒
R27/28  Very toxic in contact with skin and if swallowed   皮肤接触及吞食都有剧毒
R36/37  Irritating to eyes and respiratory system  对眼睛和呼吸系统有刺激性 
R36/37/38 Irritating to eyes, respiratory system and skin  对眼睛、呼吸系统和皮肤有刺激性 
R36/38 Irritating to eyes and skin  对眼睛和皮肤有刺激性 
R37/38 Irritating to respiratory system and skin  对呼吸系统和皮肤有刺激性 
R39/23 Toxic: danger of very serious irreversible effects through inhalation  毒性：吸入会有十分严重的不可逆性危险 
R39/23/24  Toxic: danger of very serious irreversible effects through inhalation, in contact with skin  毒性：吸入，皮肤接触都会有十分严重的不可逆性危险 
R39/23/24/25  Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed 毒性：吸入，皮肤接触和吞食都会产生十分严重的不可逆危险 
R39/23/25   Toxic: danger of very serious irreversible effects through inhalation and if swallowed  毒性：吸入及吞食都会产生十分严重的不可逆危险
R39/24   Toxic: danger of very serious irreversible effects in contact with skin 毒性：皮肤接触会产生十分严重的不可逆危险 
R39/24/25  Toxic: danger of very serious irreversible effects in contact with skin and if swallowed 毒性：皮肤接触及吞食都会产生十分严重的不可逆危险 
R39/25  Toxic: danger of very serious irreversible effects if swallowed   毒性：吞食会产生十分严重的不可逆危险
R39/26  Very toxic: danger of very serious irreversible effects through inhalation   剧毒：吸入会产生十分严重的不可逆危险
R39/26/27  Very toxic: danger of very serious irreversible effects through inhalation and in contact with skin  剧毒：吸入及皮肤接触都会产生十分严重的不可逆危险 
R39/26/27/28  Very toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed  剧毒：吸入，皮肤接触及吞食都会产生十分严重的不可逆危险 
R39/26/28  Very toxic: danger of very serious irreversible effects through inhalation and if swallowed  剧毒：吸入及吞食都会产生十分严重的不可逆危险