8.05740

Sigma-Aldrich

2-Mercaptoethanol

for synthesis

Synonym(s):
β-Mercaptoethanol, BME, Thioethylene glycol, Thioglycol, Thioethylene glycol, 2-Hydroxyethylmercaptan
Linear Formula:
HSCH2CH2OH
CAS Number:
Molecular Weight:
78.13
Beilstein/REAXYS Number:
773648
MDL number:
EC Index Number:
200-464-6

storage conditions

Store below +30°C.

Quality Level

vapor density

2.69 (vs air)

vapor pressure

1 mmHg ( 20 °C)

assay

≥99% (GC)

form

liquid

autoignition temp.

295 °C

potency

98-162 mg/kg LD50, oral (Rat)
112-224 mg/kg LD50, skin (Rabbit)

expl. lim.

18 %

reaction suitability

reagent type: reductant

concentration

14.3 M (pure liquid)

refractive index

n20/D 1.500 (lit.)

pH

4.5-6 (20 °C, 500 g/L in H2O)

bp

157 °C (lit.)

mp

<-50 °C

transition temp

flash point 70.5 °C

density

1.114 g/mL at 25 °C (lit.)

storage temp.

2-30°C

SMILES string

OCCS

InChI

1S/C2H6OS/c3-1-2-4/h3-4H,1-2H2

InChI key

DGVVWUTYPXICAM-UHFFFAOYSA-N

Application

BME is suitable for reducing protein disulfide bonds prior to polyacrylamide gel electrophoresis and is usually included in a sample buffer for SDS-PAGE at a concentration of 5%. Cleaving intermolecular (between subunits) disulfide bonds allows the subunits of a protein to separate independently on SDS-PAGE. Cleaving intramolecular (within subunit) disulfide bonds allows the subunits to become completely denatured so that each peptide migrates according to its chain length with no influence due to secondary structure.

Signal Word

Danger

hazcat

Acute Tox. 2 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Repr. 2 - Skin Irrit. 2 - Skin Sens. 1A - STOT RE 2 Oral

storage_class_code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK Germany

WGK 3

Flash Point(F)

165.2 °F - closed cup

Flash Point(C)

74 °C - closed cup

Certificate of Analysis

Certificate of Origin

Georg Michlits et al.
Nature methods, 17(7), 708-716 (2020-06-10)
CRISPR-Cas9 screens have emerged as a transformative approach to systematically probe gene functions. The quality and success of these screens depends on the frequencies of loss-of-function alleles, particularly in negative-selection screens widely applied for probing essential genes. Using optimized screening...

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