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R13、R35 等。这些危险信息代码有以下意义：
R1 干燥时有爆炸性。 Explosive when dry.
R2 受冲击、摩擦、着火或其他引燃源有爆炸危险。 Risk of explosion by shock, friction, fire or other sources of ignition.
R3 受冲击、摩擦、着火或其他引燃源有高爆炸危险。 Extreme risk of explosion by shock, friction, fire or other sources of ignition.
R4 生成敏感的爆炸性金属化合物。 Forms very sensitive explosive metallic compounds.
R5 受热可能引起爆炸。 Heating may cause an explosion.
R6 与空气或未与空气接触发生爆炸。 Explosive with or without contact with air.
R7 可能引起火灾。 May cause fire.
R8 与可燃物料接触可能引起火灾。 Contact with combustible material may cause fire.
R9 与可燃物料混合时发生爆炸。 Explosive when mixed with combustible material.
R10 易燃的。 Flammable.
R11 高度易燃的。 Highly flammable.
R12 易燃的。 Extremely flammable.
R13 端易燃的液化气体。
R14 与水猛烈反应。 Reacts violently with water.
R14/15 与水猛烈反应，释放出易燃气体。 Reacts violently with water, liberating highly flammable gases.
R15 与水接触释放出易燃气体。 Contact with water liberates extremely flammable gases.
R15/29 与水接触释放出有毒的，易燃气体。 Contact with water liberates toxic, highly flammable gas.
R16 与氧化性物质混合时发生爆炸。 Explosive when mixed with oxidizing substances.
R17 在空气中易自燃。 Spontaneously flammable in air.
R18 使用中可能形成易燃/爆炸性蒸气空气混合物。 In use, may form flammable/explosive vapour-air mixture.
R19 可能生成爆炸性过氧化物。 May form explosive peroxides.
R20 吸入有害。 Harmful by inhalation.
R20/21 吸入和与皮肤接触是有害的。 Harmful by inhalation and in contact with skin.
R20/21/22 吸入、与皮肤接触和吞食是有害的。 Harmful by inhalation, in contact with skin and if swallowed.
R20/22 吸入和吞食是有害的。 Harmful by inhalation and if swallowed.
R21 与皮肤接触是有害的。 Harmful in contact with skin.
R21/22 与皮肤接触和吞食是有毒的。 Harmful in contact with skin and if swallowed.
R22 吞食是有害的。 Harmful if swallowed.
R23 吸入有害。 Toxic by inhalation.
R23/24 吸入和与皮肤接触是有毒的。 Toxic by inhalation and in contact with skin.
R23/24/25 吸入、与皮肤接触和吞食是有毒的。 Toxic by inhalation, in contact with skin and if swallowed.
R23/25 吸入和吞食是有毒的。 Toxic by inhalation and if swallowed.
R24 与皮肤接触有毒。 Toxic in contact with skin.
R24/25 与皮肤接触和吞食是有毒的。 Toxic in contact with skin and if swallowed. R25 吞食有毒。 Toxic if swallowed.
R26 吸入有高毒性。 Very toxic by inhalation.
R26/27 吸入和与皮肤接触有高毒性。 Very toxic by inhalation and in contact with skin.
R26/27/28 吸入、与皮肤接触和吞食有高毒性。 Very toxic by inhalation, in contact with skin and if swallowed.
R26/28 吸入和吞食有高毒性。 Very toxic by inhalation and if swallowed.
R27 与皮肤接触有高毒性。 Very toxic in contact with skin.
R27/28 与皮肤接触和吞食有高毒性。 Very toxic in contact with skin and if swallowed.
R28 吞食有高毒性。 Very toxic if swallowed.
R29 与水接触释放出有毒气体。 Contact with water liberates toxic gas.
R30 使用会变为高度易燃的。 Can become highly flammable in use.
R31 与酸接触释放出有毒气体。 Contact with acids liberates toxic gas.
R32 与酸接触释放出高毒性气体。 Contact with acids liberates very toxic gas.
R33 有累积作用危险。 Danger of cumulative effects.
R34 引起灼伤。 Causes burns.
R35 引起严重灼伤。 Causes severe burns.
R36 刺激眼睛。 Irritating to eyes.
R36/37 刺激眼睛和呼吸系统。 Irritating to eyes and respiratory system.
R36/37/38 刺激眼睛、呼吸系统和皮肤。 Irritating to eyes, respiratory system and skin.
R36/38 刺激眼睛和皮肤。 Irritating to eyes and skin.
R37 刺激呼吸系统。 Irritating to respiratory system.
R37/38 刺激呼吸系统和皮肤。 Irritating to respiratory system and skin.
R38 刺激皮肤。 Irritating to skin.
R39 有严重不可逆作用危险。 Danger of very serious irreversible effects.
R39/23 有毒的：经吸入有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects through inhalation.
R39/23/24 有毒的：经吸入和与皮肤接触有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects through inhalation and in contact with skin.
R39/23/24/25 有毒的：经吸入、与皮肤接触和吞食有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed.
R39/23/25 有毒的：经吸入和吞食有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects through inhalation and if swallowed.
R39/24 有毒的：与皮肤接触有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects in contact with skin.
R39/24/25 有毒的：与皮肤接触和吞食有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects in contact with skin and if swallowed.
R39/25 有毒的：吞食有严重不可逆作用危险。 Toxic : danger of very serious irreversible effects if swallowed.
R39/26 高毒性：经吸入有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects through inhalation.
R39/26/27 高毒性：经吸入和与皮肤接触有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects through inhalation and in contact with skin.
R39/26/27/28 高毒性：经吸入、与皮肤接触和吞食有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed.
R39/26/28 高毒性：经吸入和吞食有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects through inhalation and if swallowed.
R39/27 高毒性：与皮肤接触有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects in contact with skin.
R39/27/28 高毒性：与皮肤接触和吞食有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects in contact with skin and if swallowed.
R39/28 高毒性：吞食有严重不可逆作用危险。 Very toxic : danger of very serious irreversible effects if swallowed.
R40 可能有不可逆作用的风险。 Possible risks of irreversible effects.
R40/20 有害的：经吸入可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects through inhalation.
R40/20/21 有害的：经吸入和与皮肤接触可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects through inhalation and in contact with skin.
R40/20/21/22 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。 Harmful : possible risk of irreversible effects through inhalation, in contact with skin and if swallowed.
R40/20/22 有害的：经吸入和吞食可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects through inhalation and if swallowed.
R40/21 有害的：与皮肤接触可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects in contact with skin.
R40/21/22 有害的：与皮肤接触和吞食可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects in contact with skin and if swallowed.
R40/22 有害的：吞食可能有不可逆作用的风险。 Harmful : possible risk of irreversible effects if swallowed
R41 对眼睛有严重损害的风险。 Risk of serious damage to eyes.
R42 吸入可能引起过敏。 May cause sensitization by inhalation.
R42/43 吸入和皮肤接触可能引起过敏。 May cause sensitization by inhalation and skin contact.
R43 皮肤接触可能引起过敏。 May cause sensitization by skin contact.
R44 在封闭情况下加热有爆炸危险。 Risk of explosion if heated under confinement.
R45 可能致癌。 May cause cancer.
R46 可能造成不可逆的遗传损害 May cause heritable genetic damage.
R47 可能引起出生缺陷。 May cause birth defects.
R48 长期接触有严重损害健康的危险。 Danger of serious damage to health by prolonged exposure.
R48/20 有害的：经吸入长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure through inhalation.
R48/20/21 有害的：经吸入和与皮肤长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin.
R48/20/21/22 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。 Harmful : danger of serious damage to health by prolonged exposure through inh.,in contact with skin and if swallowed
R48/20/22 有害的：经吸入和吞食长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure through inhalation and if swallowed.
R48/21 有害的：经皮肤长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure in contact with skin.
R48/21/22 有害的：经皮肤和吞食长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed.
R48/22 有害的：吞食长期接触有严重损害健康的危险。 Harmful : danger of serious damage to health by prolonged exposure if swallowed.
R48/23 有毒的：经吸入长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure through inhalation.
R48/23/24 有毒的：经吸入和与皮肤长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin.
R48/23/24/25 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。 Toxic : danger of serious damage to health by prolonged exposure through inh.,in contact with skin and if swallowed
R48/23/25 有毒的：经吸入和吞食长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure through inhalation and if swallowed.
R48/24 有毒的：经皮肤长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure in contact with skin.
R48/24/25 有毒的：经皮肤和吞食长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure in contact with skin and if swallowed.
R48/25 有毒的：吞食长期接触有严重损害健康的危险。 Toxic : danger of serious damage to health by prolonged exposure if swallowed.
R49 吸入可能致癌。 May cause cancer by inhalation.
R50 对水生生物有高毒性。 Very toxic to aquatic organisms.
R50/53 对水生生物有高毒性，可能在水生环境中造成长期不利影响。 Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R51 对水生生物是有毒的。 Toxic to aquatic organisms.
R51/53 对水生生物有毒，可能在水生环境中造成长期不利影响。 Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R52 对水生生物是有害的。 Harmful to aquatic organisms.
R52/53 对水生生物有害，可能在水生环境中造成长期不利影响。 Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R53 可能在水生环境中造成长期不利影响。 May cause long-term adverse effects in aquatic environment.
R54 对植物群有毒。 Toxic to flora.
R55 对动物群有毒。 Toxic to fauna.
R56 对土壤中生物有毒。 Toxic to soil organisms.
R57 对蜜蜂有毒。 Toxic to bees.
R58 可能在环境中造成长期不利影响。 May cause long-term adverse effects in the environment.
R59 对臭氧层有危害。 Dangerous for the ozon layer.
R60 可能损伤生育力。 May impair fertility.
R61 可能对未出生婴儿造成危害。 May cause harm to the unborn child.
R62 可能有损伤生育力的危险。 Possible risk of impaired fertility.
R63 可能有损害未出生婴儿的危险。 Possible risk of harm to the unborn child.
R64 可能对哺乳婴儿造成危害。 May cause harm to breastfed babies.
R65 有害的：吞食可能造成肺部损害。 Harmfull may cause lung damage if swallowed
R66 反复接触可能导致皮肤干燥或皴裂。 Harmfull may cause lung damage if swallowed
R67 蒸汽可能导致嗜睡和昏厥。 Harmfull may cause lung damage if swallowed
R68 可能有不可挽回的作用的危险。 Harmfull may cause lung damage if swallowed