二甲基肼是一种有机化合物，分子式为C2H10Cl2N2，分子量133.02。它是一种白色结晶，易溶于水和乙醇，有潮解性。诱变剂，科学实验中用于诱导结肠癌。

中文同义词：1,2-二甲肼盐酸盐；对称二甲肼盐酸盐；二甲基哌嗪；二甲基肼吡啶；1,2-二甲基肼二盐酸盐；N,N-二甲基肼二盐酸盐；对称二甲基肼二盐酸盐

英文同义词：1,2-dimethyl-hydrazindihydrochloride; 1,2-dimethylhydraziniumdichloride; 1,2-DIMETHYLHYDRAZINE 2HCL; 1,2-DIMETHYLHYDRAZINE DIHYDROCHLORIDE; N,N'-DIMETHYLHYDRAZINE DI HCL (SYM); N,N'-DIMETHYLHYDRAZINE DIHYDROCHLORIDE; SYM-DIMETHYLHYDRAZINE DIHYDROCHLORIDE; N,N'-Dimethylhydrazine (sym.) dihydrochloride

熔点：166-167℃

沸点：63.9°C at 760 mmHg

闪点：1.1°C

蒸汽压：168mmHg at 25°CLORIDE

白色结晶，容易溶于水与乙醇，其有潮解性。

用于有机合成。

由苯甲酰氯与硫酸肼反应生成对称二苯甲酰肼，再与硫酸二甲酯反应得到对称二苯甲酰二甲肼，最后将其与盐酸一起回流2小时，进行水蒸气蒸馏，将剩余物减压蒸发至干，结晶出对称二甲肼盐酸盐。

S24/25: Avoid contact with skin and eyes.

S45: In case of accident of if you feel unwell, seek medical advice immediately (show the label where possible).

S53: Avoid exposure - obtain special instructions before use.

R23/24/25: Toxic by inhalation, in contact with skin and if swallowed.

R45: May cause cancer.