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43819

Sigma-Aldrich

DL-Dithiothreitol

≥99.0% (RT)

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Synonym(s):
threo-1,4-Dimercapto-2,3-butanediol, Cleland’s reagent, DTT
Linear Formula:
HSCH2CH(OH)CH(OH)CH2SH
CAS Number:
Molecular Weight:
154.25
Beilstein/REAXYS Number:
1719757
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

assay

≥99.0% (RT)

form

powder

reaction suitability

reagent type: reductant

impurities

≤0.3% 4,5-dihydroxy-1,2-dithiane

mp

40-43 °C
41-44 °C (lit.)

solubility

H2O: 50 mg/mL, clear, colorless
H2O: freely soluble
acetone: freely soluble
chloroform: freely soluble
diethyl ether: freely soluble
ethanol: freely soluble
ethyl acetate: freely soluble

anion traces

sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤250 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

storage temp.

2-8°C

SMILES string

O[C@H](CS)[C@H](O)CS

InChI

1S/C4H10O2S2/c5-3(1-7)4(6)2-8/h3-8H,1-2H2/t3-,4-/m1/s1

InChI key

VHJLVAABSRFDPM-QWWZWVQMSA-N

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1 of 4

This Item
D5545D916343815
vibrant-m

43819

DL-Dithiothreitol

-
vibrant-m

D5545

DL-Dithiothreitol

Premium Grade
vibrant-m

D9163

DL-Dithiothreitol

-
vibrant-m

43815

DL-Dithiothreitol

Premium Grade
assay

≥99.0% (RT)

assay

≥99.0% (titration)

assay

≥99%

assay

≥99.5% (RT)

impurities

≤0.3% 4,5-dihydroxy-1,2-dithiane

impurities

Insoluble matter, passes filter test, ≤0.3% 4,5-dihydroxy-1,2-dithiane

impurities

-

impurities

DNases, none detected, RNases, none detected, insoluble matter, passes filter test, phosphatases, none detected, proteases, none detected, ≤0.3% 4,5-dihydroxy-1,2-dithiane

form

powder

form

powder

form

powder

form

powder

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

mp

40-43 °C, 41-44 °C (lit.)

mp

41-44 °C (lit.)

mp

40-44 °C, 41-44 °C (lit.)

mp

41-44 °C (lit.)

Application

DL-Dithiothreitol is a pivotal component used in the preparation of buffer which in turn is utilized in the platelet cytosol preparation. It is also important in isolation of RNA by using guanidinium salts and homogenisation of tissue and cells.
An excellent reagent for maintaining SH groups in reduced state; quantitatively reduces disulfides. DTT is effective in sample buffers for reducing protein disulfide bonds prior to SDS-PAGE. DTT can also be used for reducing the disulfide bridge of the cross-linker N,N′-bis(acryloyl)cystamine to break apart the matrix of a polyacrylamide gel. DTT is less pungent and is less toxic than 2-mercaptoethanol. Typically, a seven fold lower concentration of DTT (100 mM) is needed than is used for 2-mercaptoethanol (5% v/v, 700 mM).

Biochem/physiol Actions

DL-Dithiothreitol denatures proteins by reducing the disulphide bonds and reducing them to SH groups. It also prevents intramolecular and intermolecular disulfide bond formation between cysteine residues of proteins.

pictograms

CorrosionExclamation mark

signalword

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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Dithiothreitol (DTT) is the standard reagent for reducing disulfide bonds between and within biological molecules. At neutral pH, however, >99% of DTT thiol groups are protonated and thus unreactive. Herein, we report on (2S)-2-amino-1,4-dimercaptobutane (dithiobutylamine or DTBA), a dithiol that
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