| 酸溜溜 | suān liū liū | sour / acid |   |
| 尖酸 | jiān suān | harsh / scathing / acid (remarks) | |
| 氨基酸 | ān jī suān | amino acid | |
| 盐酸 | yán suān | hydrochloric acid HCl | |
| 硫酸 | liú suān | sulfuric acid H2SO4 / sulfate | |
| 磷酸 | lín suān | phosphoric acid | |
| 脂肪酸 | zhī fáng suān | fatty acid | |
| 醋酸 | cù suān | acetic acid (CH3COOH) / acetate | |
| 碳酸 | tàn suān | carbonic acid / carbonate | |
| 核酸 | hé suān | nucleic acid / (coll.) nucleic acid test (abbr. for 核酸檢測|核酸检测[he2suan1 jian3ce4]) | |
| 乙酸 | yǐ suān | acetic acid (CH3COOH) / ethanoic acid | |
| 丙烯酸 | bǐng xī suān | acrylic acid C3H4O2 | |
| 硝酸 | xiāo suān | nitric acid | |
| 乳酸 | rǔ suān | lactic acid | |
| 叶酸 | yè suān | folic acid | |
| 胃酸 | wèi suān | gastric acid | |
| 柠檬酸 | níng méng suān | citric acid | |
| 赖氨酸 | lài ān suān | lysine (Lys), an essential amino acid | |
| 酸雨 | suān yǔ | acid rain | |
| 苯甲酸 | běn jiǎ suān | benzoic acid C6H5COOH | |
| 甲酸 | jiǎ suān | formylic acid (HCOOH) / formic acid / methanoic acid | |
| 乳酸菌 | rǔ suān jūn | lactic acid bacteria | |
| 草酸 | cǎo suān | oxalic acid C2H2O4 | |
| 硬脂酸 | yìng zhī suān | stearic acid / stearate | |
| 水杨酸 | shuǐ yáng suān | salicylic acid | |
| 酒石酸 | jiǔ shí suān | tartaric acid | |
| 蛋氨酸 | dàn ān suān | methionine (Met), an essential amino acid | |
| 烟酸 | yān suān | niacin (vitamin B3) / 3-Pyridinecarboxylic acid C6H5NO2 / nicotinic acid | |
| 硼酸 | péng suān | boric acid H3BO3 | |
| 硅酸 | guī suān | silicic acid / silicate | |
| 谷氨酸 | gǔ ān suān | glutamic acid (Glu), an amino acid | |
| 酪氨酸 | lào ān suān | tyrosine (Tyr), an amino acid | |
| 耐受性 | nài shòu xìng | tolerance (to heat, acid etc) / resistance | |
| 醇酸 | chún suān | alkyd / alcohol acid / hydroxyacid | |
| 羧酸 | suō suān | carboxylic acid | |
| 油酸 | yóu suān | oleic acid | |
| 丙氨酸 | bǐng ān suān | alanine (Ala), an amino acid | |
| 透明质酸 | tòu míng zhì suān | hyaluronic acid / hyaluronan | |
| 冰醋酸 | bīng cù suān | glacial acetic acid | |
| 半胱氨酸 | bàn guāng ān suān | cysteine (Cys), an amino acid / mercaptoethyl amine | |
| 亚麻酸 | yà má suān | linolenic acid | |
| 甘氨酸 | gān ān suān | glycine (Gly), an amino acid | |
| 精氨酸 | jīng ān suān | argnine (Arg), an essential amino acid | |
| 色氨酸 | sè ān suān | tryptophan (Trp), an essential amino acid | |
| 氰酸 | qíng suān | cyanic acid HCN | |
| 抗坏血酸 | kàng huài xuè suān | vitamin C / ascorbic acid | |
| 亚硝酸 | yà xiāo suān | nitrous acid | |
| 氢氟酸 | qīng fú suān | hydrofluoric acid HF | |
| 氢溴酸 | qīng xiù suān | hydrobromic acid HBr | |
| 弱酸 | ruò suān | weak acid | |
| 丙酮酸 | bǐng tóng suān | pyruvic acid CH3COCOOH | |
| 亚硫酸 | yà liú suān | sulfurous acid H2SO3 | |
| 丝氨酸 | sī ān suān | serine (Ser), an amino acid | |
| 苏氨酸 | sū ān suān | threonine (Thr), an essential amino acid | |
| 单宁酸 | dān níng suān | tannic acid (loanword) | |
| 己二酸 | jǐ èr suān | adipic acid | |
| 亮氨酸 | liàng ān suān | leucine (Leu), an essential amino acid | |
| 氟化氢 | fú huà qīng | hydrofluoric acid | |
| 组氨酸 | zǔ ān suān | histidine (His), an essential amino acid | |
| 高氯酸 | gāo lu:4 suān | perchloric acid | |
| 碘酸 | diǎn suān | iodic acid | |
| 异亮氨酸 | yì liàng ān suān | isoleucine (Ile), an essential amino acid | |
| 酸 |  suān | sour / tart / sick at heart / grieved / sore / aching / pedantic / impractical / to make sarcastic remarks about sb / an acid | |
| 酰 | xiān | acid radical / -acyl (chemistry) | |
| 镪 | qiāng | sulfuric acid | |
| 核糖核酸 | hé táng hé suān | ribonucleic acid (RNA) | |
| 次氯酸 | cì lu:4 suān | hypochlorous acid HOCl (bleach) | |
| 软脂酸 | ruǎn zhī suān | palmitic acid (chemistry) | |
| 酸雾 | suān wù | acid fog | |
| 樲 | èr | acid variety of jujube plum | |
| 二甲基胂酸 | èr jiǎ jī shèn suān | dimethylarsenic acid (CH3)2AsO2H / cacodylic acid | |
| 氢化氰 | qīng huà qíng | hydrocyanic acid / hydrogen cyanide | |
| 去氧核糖核酸 | qù yǎng hé táng hé suān | deoxyribonucleic acid / DNA | |
| 脱氧脱糖核酸 | tuō yǎng tuō táng hé suān | deoxyribonucleic acid (DNA) | |
| 蚁酸 | yǐ suān | formic acid | |
| 酸式盐 | suān shì yán | acid salt | |
| 不饱和脂肪酸 | bù bǎo hé zhī fáng suān | unsaturated fatty acid | |
| 乙醇酸 | yǐ chún suān | glycolic acid C2H4O3 | |
| 二甲基砷酸 | èr jiǎ jī shēn suān | dimethylarsenic acid (CH3)2AsO2H / cacodylic acid | |
| 亚砷酸 | yà shēn suān | arsenous acid | |
| 反式脂肪 | fǎn shì zhī fáng | trans fat / trans-isomer fatty acid | |
| 多元不饱和脂肪酸 | duō yuán bù bǎo hé zhī fáng suān | polyunsaturated fatty acid | |
| 天冬氨酸 | tiān dōng ān suān | aspartic acid (Asp), an amino acid | |
| 天冬酰胺 | tiān dōng xiān àn | asparagine (Asn), an amino acid | |
| 柠檬酸循环 | níng méng suān xún huán | citric acid cycle / Krebs cycle / tricarboxylic acid cycle | |
| 次溴酸 | cì xiù suān | hypobromous acid HOBr | |
| 氟硅酸 | fú guī suān | fluorosilicic acid H2SiF6 / fluorosilicate | |
| 氨基苯酸 | ān jī běn suān | aminobenzoic acid | |
| 氢氯酸 | qīng lu:4 suān | hydrochloric acid HCl / also written 鹽酸|盐酸[yan2 suan1] | |
| 氢卤酸 | qīng lǔ suān | hydrohalic acid (e.g. hydrofluoric acid HF 氫氟酸|氢氟酸[qing1 fu2 suan1], hydrochloric acid HCl 鹽酸|盐酸[yan2 suan1] etc) | |
| 氯酸 | lu:4 suān | chloric acid HClO3 / chlorate | |
| 泛酸 | fàn suān | pantothenic acid / vitamin B5 / to surge up (of acid in the stomach) | |
| 烟碱酸 | yān jiǎn suān | niacin (vitamin B3) / nicotinic acid / Pyridine-3-carboxylic acid C6H5NO2 | |
| 玻尿酸 | bō niào suān | hyaluronic acid / hyaluronan | |
| 甲硫氨酸 | jiǎ liú ān suān | methionine (Met), an essential amino acid | |
| 硫氰酸 | liú qíng suān | thiocyanic acid | |
| 缬氨酸 | xié ān suān | valine (Val), an essential amino acid | |
| 羟基丁酸 | qiǎng jī dīng suān | gamma-Hydroxybutyric acid, GHB | |
| 羧基酸 | suō jī suān | carboxylic acid | |
| 胺基酸 | àn jī suān | (Tw) amino acid | |
