|Jmol-3D images||Image 1|
|Molar mass||124.16 g/mol|
|Appearance||Clear colorless liquid|
|Density||1.1452 g/cm3 (22 °C)|
|Melting point||< 25 °C|
|Boiling point||213–213.5 °C, 486.2-486.7 K|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
Ethyl methanesulfonate (EMS) is a mutagenic, teratogenic, and possibly carcinogenic organic compound with formula CH3SO3C2H5. It produces random mutations in genetic material by nucleotide substitution; particularly by guanine alkylation. This typically produces only point mutations. It can induce mutations at a rate of 5x10-4 to 5x10-2 per gene without substantial killing. The ethyl group of EMS reacts with guanine in DNA, forming the abnormal base O-6-ethylguanine. During DNA replication, DNA polymerases that catalyze the process frequently place thymine, instead of cytosine, opposite O-6-ethylguanine. Following subsequent rounds of replication, the original G:C base pair can become an A:T pair (a transition mutation). This changes the genetic information, is often harmful to cells, and can result in disease.
- Merck Index, 11th Edition, 3782.