硫酸（化学式：H2SO4），硫的最重要的含氧酸。无水硫酸为无色油状液体，10.36℃时结晶，通常使用的是它的各种不同浓度的水溶液，用塔式法和接触法制取。前者所得为粗制稀硫酸，质量分数一般在75%左右；后者可得质量分数98.3%的浓硫酸，沸点338℃，相对密度1.84。

中文名     硫酸                                                                           外文名 Sulfuric acid

分子式   H?SO?                                                                     分子量  98.078

标况状态    透明无色无臭液体                                                密    度    1.8305 g/cm3

熔    点     10.371 ℃                                                                  沸    点  337 ℃

溶解度    与水任意比互溶                                                        蒸汽压     6×10?? mmHg

动态粘滞度     0.021 Pa s (25℃)                                               表面张力    0.0735 N/m

折射率     1.41827                                                                      热容量      1.416 J/(g K) (STP)

汽化热           0.57 kJ/g (STP)                                                     熔化热     0.1092 kJ/g (STP)

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