Skip to Content
Merck
All Photos(7)

Key Documents

D9779

Sigma-Aldrich

DL-Dithiothreitol

for molecular biology, ≥98% (HPLC), ≥99% (titration)

Synonym(s):

(±)-Dithiothreitol, rac-Dithiothreitol, Dithiothreitol, threo-1,4-Dimercapto-2,3-butanediol, Cleland’s reagent, DTT

Sign Into View Organizational & Contract Pricing


About This Item

Linear Formula:
HSCH2CH(OH)CH(OH)CH2SH
CAS Number:
Molecular Weight:
154.25
Beilstein:
1719757
EC Number:
MDL number:
UNSPSC Code:
12161504
PubChem Substance ID:
NACRES:
NA.31

grade

for molecular biology

Assay

≥98% (HPLC)
≥99% (titration)

form

powder

reaction suitability

reagent type: reductant

mp

41-44 °C (lit.)

solubility

H2O: 50 mg/mL

cation traces

heavy metals (as Pb): ≤5 ppm

suitability

suitable for molecular biology

foreign activity

DNase, RNase, protease, none detected

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

Looking for similar products? Visit Product Comparison Guide

General description

Dithiothreitol (DTT) is an excellent reagent for maintaining SH groups in a reduced state in proteins. It initiates the thiol-disulfide exchange reaction to completely reduce the intra-or inter-molecular disulfide bonds in biomolecules. DTT specifically targets the disulfide bridge of the cross-linker N,N′-bis(acryloyl)cystamine to break apart the matrix of a polyacrylamide gel and sodium dodecyl polyacrylamide gel electrophoresis (SDS-PAGE). Hence, it is highly effective in use with buffers that quantitatively reduce disulfides. DTT is less pungent and less toxic in nature than 2-mercaptoethanol. It is also 7x more concentrated than beta-mercaptoethanol.

Application

DL-Dithiothreitol is used in protein samples to reduce the disulfide bonds before loading the sample onto the gel for Western Blot or SDS-PAGE It has been used in the procedure of in situ hybridization of mRNA.

It has been used:
  • as a component for protein extraction in western blot analysis
  • to prepare sample lysis buffer for quantitative mass spectroscopy
  • as a kinase buffer component for enzyme-linked immunosorbent assay (ELISA)
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

Dithiothreitol (DTT) is frequently utilized in biochemical preparations of thiol proteins and chemical peptide synthesis. DTT is also used in protein chemistry research on the folding of proteins and enzyme activity.

Features and Benefits

  • Suitable for molecular biology
  • RNase, DNase, Exonuclease, and Protease-free
  • High purity (HPLC ≥98%)
  • No heavy metal ≤5ppm

Other Notes

For additional information on our range of Biochemicals, please complete this form.

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

A quantitative in situ hybridization protocol for formalin-fixed paraffin-embedded archival post-mortem human brain tissue.
Liu CQ et al.
Methods, 52, 359-359 (2010)
Dan Su et al.
Evidence-based complementary and alternative medicine : eCAM, 2019, 4982062-4982062 (2019-05-17)
The Janus kinases (JAKs) consist of four similar tyrosine kinases and function as key hubs in the signaling pathways that are implicated in both innate and adaptive immunity. Among the four members, JAK3 is probably the more attractive target for
Proteomic Approach for Extracting Cytoplasmic Proteins from Streptococcus sanguinis using Mass Spectrometry
Fadi El-Rami, et al.
Journal of Molecular Biology (2017)
Tommy Weiss-Sadan et al.
Theranostics, 9(20), 5731-5738 (2019-09-20)
Despite the common use of lipid-lowering medications, cardiovascular diseases continue to be a significant health concern. Atherosclerosis, one of the most frequent causes of cardiovascular morbidity, involves extensive inflammatory activity and remodeling of the vascular endothelium. This relentless inflammatory condition
Benjamin Ziman et al.
STAR protocols, 2(1), 100274-100274 (2021-01-26)
In the planarian field, two techniques are mostly used for protein detection: immunohistochemistry (IHC) and western blotting. While IHC is great for visualizing the spatial distribution of proteins in whole organisms, it has limitations in antibody availability and issues related

Protocols

Follow this DDT reduction protocol to reduce disulfide bonds in thiol-modified oligonucleotides.

Follow this DDT reduction protocol to reduce disulfide bonds in thiol-modified oligonucleotides.

Follow this DDT reduction protocol to reduce disulfide bonds in thiol-modified oligonucleotides.

Follow this DDT reduction protocol to reduce disulfide bonds in thiol-modified oligonucleotides.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service