| 聚乙烯 | jù yǐ xī | polythene / polyethylene |  |
| 苯乙烯 | běn yǐ xī | Styrene |  |
| 氯乙烯 | lu:4 yǐ xī | vinyl chloride (chloroethene C2H3Cl) |  |
| 苯乙酸 | běn yǐ suān | phenylacetic acid |  |
| 待乙妥 | dài yǐ tuǒ | DEET (insect repellent) (loanword) |  |
| 孔乙己 | Kǒng Yǐ jǐ | Kong Yiji, protagonist of a short story of the same name by Lu Xun 魯迅|鲁迅[Lu3 Xun4] depicting the life of a poor, unsuccessful scholar who clings to his Confucian ideals despite his dismal circumstances |  |
| 氯乙烷 | lu:4 yǐ wán | ethyl chloride / chloroethane / monochloroethane / chlorethyl |  |
| 溴乙烷 | xiù zhé wán | ethyl bromide / bromoethane / monobromoethane / bromic ether / hydrobromic ether |  |
| 氧乙炔 | yǎng yǐ quē | oxyacetylene |  |
| 聚氯乙烯 | jù lu:4 yǐ xī | polyvinyl chloride (PVC) |  |
| 聚苯乙烯 | jù běn yǐ xī | polystyrene |  |
| 三氯乙烯 | sān lu:4 yǐ xī | trichloroethylene / trichloroethene |  |
| 氟氯乙烷 | | chlorofluoroethane |  |
| 芬乙茶碱 | | fenetylline |  |
| 甲乙哌酮 | | methyprylon |  |
| 醋酸乙酯 | cù suān yǐ zhǐ | ethyl acetate / acetidin |  |
| 二氯乙烯 | èr lu:4 zhé xī | acetylene dichloride / dichloroethylene |  |
| 环氧乙烷 | huán yǎng yǐ wán | ethylene oxide |  |
| 金刚乙胺 | jīn gāng yǐ ān | rimantadine |  |
| 六氯乙烷 | liù lu:4 zhé wán | hexachloroethane / perchloroethane |  |
| 全氯乙烷 | quán lu:4 zhé wán | hexachloroethane / perchloroethane |  |
| 四氯乙烯 | sì lu:4 yǐ xī | tetrachloroethylene |  |
| 五氯乙烷 | wǔ lu:4 zhé wán | pentachloroethane |  |
| 氧乙炔焊 | yǎng yǐ quē hàn | oxyacetylene welding |  |
| 氧乙炔炬 | yǎng yǐ quē jù | an oxyacetylene torch |  |
| 1,1-二氟乙烷 | 1,1-èr fú zhé wán | ethylidene fluoride / 1,1-difluoroethane / 1,1-difluoro- ethane / C2H4F2 |  |
| 1,2-二氯乙烷 | 1,2-èr lu:4 zhé wán | ethylene dichloride / 1,2-dichloroethane / sym-dichloroethane / ethylene chloride |  |
| 1,2-二卤乙烷 | 1,2-èr lǔ zhé wán | ethylene hydrocarbons |  |
| 1,1-二氯乙烷 | 1,1-èr lu:4 zhé wán | ethylidene chloride / 1,1-dichloro- ethane |  |
| 1,2-二溴乙烷 | 1,2-èr xiù zhé wán | ethylene dibromide / ethylene bromide / 1,2-dibromoethane |  |
| 1,1,1-三氯乙烷 | 1,1,1-sān lu:4 zhé wán | 1,1,1-trichloroethane / methyl chloroform |  |
| 1,1,2-三氯乙烷 | 1,1,2-sān lu:4 zhé wán | vinyl trichloride / 1,1,2-trichloroethane |  |
| 聚四氟乙烯 | jù sì fú yǐ xī | polytetrafluoroethylene (PTFE), trademarked as Teflon |  |
| 氯氟卓乙酯 | | ethyl loflazepate |  |
| 二乙酰吗啡 | | diacetylmorphine |  |
| 二卤化乙烯 | èr lǔ huà zhé xī | ethylene hydrocarbons |  |
| 二氯化乙烯 | èr lu:4 huà zhé xī | ethylene dichloride / 1,2-dichloroethane / sym-dichloroethane / ethylene chloride |  |
| 二溴化乙烯 | èr xiù huà zhé xī | ethylene dibromide / ethylene bromide / 1,2-dibromoethane |  |
| 二乙烯基醚 | èr zhé xī jī mí | vinyl ether |  |
| 合四乙尺工 | hé sì yǐ chě gōng | names of the five notes of the Chinese pentatonic scale, corresponding roughly to do, re, mi, sol, la |  |
| 合四乙尺工 | hé sì yǐ chǐ gōng | names of the five notes of the Chinese pentatonic scale, corresponding roughly to do, re, mi, sol, la |  |
| 苦味呋乙啶 | kǔ wèi fū zhé dìng | furethidine picrate |  |
| 麦角二乙胺 | mài jué èr zhé àn | lysergide |  |
| 五氟氯乙烷 | wǔ fú lu:4 zhé wán | chloropentafluoroethane / monochloro- pentafluoroethane |  |
| 氧乙炔焊炬 | yǎng yǐ quē hàn jù | oxyacetylene torch |  |
| 1-氯-1,1-二氟乙烷 | | ss1-chloro-1,1-difluoroethane / 1,1-difluoro-1-chloroethane |  |
| 1,1-二氟-1-氯乙烷 | | difluoromonochloroethane |  |
| 可降解聚乙烯 | | degradable polyethylene |  |
| 发泡聚苯乙烯 | | expanded polystyrene |  |
| 氧乙炔切割机 | | oxyacetylene torch / oxyacetylene cutter |  |
| 盐酸乙环利定 | | eticyclidine hydrochloride |  |
| 盐酸苯乙哌啶 | | diphenoxylate hydrochloride |  |
| 盐酸乙基吗啡 | | ethylmorphine hydrochloride |  |
| 对乙酰氨基酚 | duì yǐ xiān ān jī fēn | paracetamol / acetaminophen |  |
| 多溴联苯乙醚 | duō xiù lián běn zhé mí | polybrominated diphenyl ether |  |
| 二氟三氯乙烷 | èr fú sān lu:4 zhé wán | difluorotrichloroethane |  |
| 二氯乙烷中毒 | èr lu:4 yǐ wán zhōng dú | dichloroethane poisoning |  |
| 高速乙太网路 | gāo sù yǐ tài wǎng lù | fast Ethernet |  |
| 焦磷酸四乙酯 | jiāo lín suān sì zhé zhǐ | tetraethylpyrophosphate |  |
| 挤塑聚苯乙烯 | jǐ sù jù běn zhé xī | extruded polystyrene |  |
| 氯二氟代乙烷 | lu:4 èr fú dài zhé wán | 1,1,1-chlorodifluoroethane / 1,1,1-difluorochloroethane / difluoromonochloroethane |  |
| 麦角酰二乙胺 | mài jué xiān èr zhé àn | d-lysergic acid dethylamide |  |
| 三氟三氯乙烷 | sān fú sān lu:4 zhé wán | trichlorotrifluoroethane |  |
| 三甲氧苯乙胺 | sān jiǎ yǎng běn zhé àn | peyote |  |
| 四氟二氯乙烷 | sì fú èr lu:4 zhé wán | dichlorotetrafluoroethane / tetrafluorodichloroethane / cryofluorane / 1,2-dichloro-1,1,2,2-tetrafluoroethane / C2Cl2F4 |  |
| 四氟二溴乙烷 | sì fú èr xiù zhé wán | halon 2402 |  |
| 四氯二氟乙烷 | sì lu:4 èr fú zhé wán | tetrachlorodifluoroethane / sym-tetrachlorodifluoroethane |  |
| 四乙基铅中毒 | sì yǐ jī qiān zhōng dú | tetraethyl lead poisoning |  |
| 太乙金华宗旨 | Tài yǐ Jīn huá Zōng zhǐ | The Secret of the Golden Flower, a classic of Chinese Taoism published in the late 17th century |  |
| 2,4-二氯苯氧乙酸 | 2,4-èr lu:4 běn yǎng zhé suān | 2,4-dichlorophenoxyacetic acid |  |
| O-乙基N, N-dimethylphosphoramidocyanidate | | O-ethyl N,N-dimethylphosphoramidocyanidate |  |
| 2,4,5-三氯苯氧乙酸 | 2,4,-sān lu:4 běn yǎng zhé suān | 2,4,5-trichlorophenoxyacetic acid |  |
| 不对称二氯乙烷 | | ethylidene chloride / 1,1-dichloro- ethane |  |
| 不对称二氟乙烷 | | ethylidene fluoride / 1,1-difluoroethane / 1,1-difluoro- ethane / C2H4F2 |  |
| 氢溴化乙基吗啡 | | ethylmorphine hydrobromide |  |
| 硫酸吗啉乙吗啡 | | pholcodine sulfonate |  |
| 呋乙啶甲碘化物 | | furethidine methyliodide |  |
| 倍他乙酰美沙醇 | | betacetylmethadol |  |
| 盐酸苯醋胺乙酯 | | dimenoxadol hydrochloride |  |
| 超高速乙太网路 | chāo gāo sù yǐ tài wǎng lù | Gigabit Ethernet |  |
| 二乙基甲苯酰胺 | èr zhé jī jiǎ běn xiān àn | DEET / diethyltoluamide |  |
| 未增塑聚氯乙烯 | wèi zēng sù jù lu:4 yǐ xī | unplasticized poly(vinyl chloride) / unplastified PVC |  |
| 2-氯乙烯基二氯胂 | 2-lu:4 zhé xī jī èr lu:4 shèn | 2-chlorovinyldichloroarsine |  |
| N-乙酰邻氨基苯酸 | N-zhé xiān lín ān jī běn suān | N-acetylanthranilic acid |  |
| 1,1,2-叁氯-1,2,2-叁氟乙烷 | | 1,1,2-trichloro-1,2,2-trifluoroethane |  |
| 甲基碘化乙基吗啡 | | morphine methyliodide |  |
| 左旋&alpha-乙酰美沙醇 | | levo-alpha acetylmethadol |  |
| 对氯基苯甲酸乙酯 | duì lu:4 jī běn jiǎ suān zhé zhǐ | ethyl-p-aminobenzoate |  |
| 二氯苯胺苯乙酸钠 | èr lu:4 běn àn běn yǐ suān nà | diclofenac sodium (non-steroidal anti-inflammatory drug used to reduce swelling and as painkiller) / also called voltaren 扶他林 |  |
| 福尔可定苯乙酸酯 | fú ěr kě dìng běn zhé suān zhǐ | pholcodine phenylacetate |  |
| 聚合溴化联苯乙醚 | jù hé xiù huà lián běn zhé mí | polybrominated diphenyl ether |  |
| 苯巴比妥-二乙基胺 | | phenobarbital diethylamine |  |
| 聚氯乙烯聚氯乙烯 | | polyvinyl chloride |  |
| 2-氯乙基氯甲基硫醚 | 2-lu:4 zhé jī lu:4 jiǎ jī liú mí | 2-chloroethylchloromethylsulphide |  |
| d-酒石酸麦角二乙胺 | d-jiǔ shí suān mài jué èr zhé àn | lysergide d-tartrate |  |
| 盐酸乙酰二氢可待因 | | acetyldihydrocodeine hydrochloride |  |
| 埃韦尔重组乙肝疫苗 | | Heberbiovac HB vaccine |  |
| 二甲氧基乙基苯丙胺 | èr jiǎ yǎng jī zhé jī běn bǐng àn | 2,5-dimethoxy-4-ethylamphetamine hydrochloride |  |
| 二氯二苯基三氯乙烷 | èr lu:4 èr běn jī sān lu:4 zhé wán | dichlorodiphenyltrichloroethane |  |
| 芬普雷司二苯乙酸盐 | fēn pǔ léi sī èr běn zhé suān yán | fenproporex diphenylacetate |  |
| 甲之蜜糖,乙之砒霜 | jiǎ zhī mì táng , yǐ zhī pī shuāng | one man's meat is another man's poison (idiom) |  |
| 匹米诺定乙基磺酸脂 | pǐ mǐ nuò dìng zhé jī huáng suān zhī | piminodine ethylsulfonate (esylate) |  |
| 周效磺胺-乙胺嘧啶) | | sulfadoxine-pyrimethamine |  |
| 盐酸阿耳法乙酰美沙醇 | | alphacetylmethadol hydrochloride |  |
| 二甲氧基乙基安非他明 | èr jiǎ yǎng jī zhé jī ān fēi tā míng | 2,5-dimethoxy-4-ethylamphetamine |  |
| 苯巴比妥-二乙基氨乙醇 | | phenobarbital diethylaminoethanol |  |
| 苯丙胺P - 氨基苯基乙酸盐 | | amphetamine p-aminophenylacetate |  |
| N-乙基-亚甲二氧基安非他明 | | N-ethyl methylenedioxyamfetamine |  |
| 二氢硫辛醯基乙醯基转基酶 | èr qīng liú xīn xī jī yǐ xī jī zhuǎn jī méi | dihydrolipoyl |  |
| 双二甲乙基萘磺酸美达西泮 | shuāng èr jiǎ zhé jī nài huáng suān měi dá xī pàn | medazepam dibunate |  |