2-MERCAPTOETHANOL (thioglycol) 99%, L

Parameter	Attribute
2-mercaptoethanol	Thioglycol, 2BME, 2-ME, β-metas, 2-mercaptoethanol, beta-Mercaptoethanol, mercaptoethanol, 60-24-2, thioglycol, 2-Hydroxy-1-ethanethiol
Formula	C2H6OS
Structure
IUPAC	2-sulfanylethanol
INCI	-
CAS	60-24-2
Molar mass	78,14 g/mol
Density	1,114 g/mL 20 °C
Solubility	Miscible with water and most polar solvents

2-Mercaptoethanol is a chemical compound with the formula HOCH₂CH₂SH. It is commonly used to reduce disulfide bonds and can act as a biological antioxidant by scavenging hydroxyl radicals. It is widely used because the hydroxyl group provides water solubility and reduces volatility. Its odor, although unpleasant, is less objectionable than that of other thiols due to its reduced vapor pressure. 2-Mercaptoethanol is a good reducing agent because it reacts rapidly with oxidizing agents.

In the cleaning industry, thioglycol is found as a pH adjuster or buffer which maintains a pH of 4.5 to 6, and is therefore very suitable for use in floor washing machine detergents, car wash shampoos, and paint and coating mixtures.

In the paint industry, 2-mercaptoethanol is used both as a solvent and as an intermediate in the production of dyes.

In metalworking, BME is used as an ingredient in the cleaning of metal surfaces from greasy soils, as well as in corrosion and oxidation protection. If tap water is used in the process, BME acts as an inhibitor of lime scale, i.e. it prevents the formation of lime scale on surfaces.

In the petroleum industry, 2-mercaptoethanol is widely used as a corrosion inhibitor, a precipitation stopping agent. Its antioxidant properties make it ideal for protecting sensitive compounds from oxygen, and its hydrophilic and hydrophobic properties make it well suited for hydrocarbon and oil melt water systems, where it mixes readily with both the aqueous and the oily phase. It can also be used in the mining industry to protect drilling fluids from oxidative processes.

In biotechnology, 2-mercaptoethanol is used to denature certain proteins. The rapid reduction of protein disulfide with 2-mercaptoethanol occurs in a two-step process involving an intermediate mixed disulfide. 2-Mercaptoethanol is often used interchangeably with dithiothreitol (DTT) or tris(2-carboxyethyl)phosphine (TCEP). 2-Mercaptoethanol is more stable than DTT, although it has a higher degradation. The half-life of 2-mercaptoethanol at pH 6,5 is more than 100 hours and its half-life at pH 8,5 is 4 hours. BME is often involved in enzymatic reactions. It is used to inhibit the oxidation of free sulfhydryl residues and therefore supports protein activity. 2-mercaptoethanol is used in several enzyme assays as a standard buffer component. Some RNA isolations use 2-mercaptoethanol. It is used in the isolation process to remove ribonucleases released during cell lysis. 2-Mercaptoethanol is also used to reduce the disulfide bonds that make ribonucleases highly stable enzymes and irreversibly denature proteins. This use prevents them from digesting the RNA during the extraction procedure.

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