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D5545

DL-Dithiothreitol

Name: <SC>DL</SC>-Dithiothreitol
Brand: SIAL

BioXtra, ≥99.0% (titration)

Synonym(s):

threo-1,4-Dimercapto-2,3-butanediol, Cleland’s reagent, DTT

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About This Item

Linear Formula:

HSCH₂CH(OH)CH(OH)CH₂SH

CAS Number:

3483-12-3

Molecular Weight:

154.25

UNSPSC Code:

12352201

NACRES:

NA.21

PubChem Substance ID:

24893941

EC Number:

222-468-7

Beilstein/REAXYS Number:

1719757

MDL number:

MFCD00004877

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Properties

product line

BioXtra

Quality Segment

200

assay

≥99.0% (titration)

form

powder

reaction suitability

reagent type: reductant

impurities

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

pH

4.0-6.0 (20-25 °C, 0.1 m in H₂O)

mp

41-44 °C (lit.)

solubility

H₂O: 0.1 M, clear, colorless

anion traces

sulfate (SO₄^2-): ≤0.005%

cation traces

Al: ≤0.0005%, As: ≤0.0001%, Ba: ≤0.0005%, Bi: ≤0.0005%, Ca: ≤0.001%, Cd: ≤0.0005%, Co: ≤0.0005%, Cr: ≤0.0005%, Cu: ≤0.0005%, Fe: ≤0.0005%, K: ≤0.005%, Li: ≤0.0005%, Mg: ≤0.0005%, Mn: ≤0.0005%, Mo: ≤0.0005%, Na: ≤0.1%, Ni: ≤0.0005%, Pb: ≤0.0005%, Sr: ≤0.0005%, Zn: ≤0.0005%

absorption

≤0.100 at 280 in H₂O at 0.1 M, ≤0.400 at 260 in H₂O at 0.1 M

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

Description

Application

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).

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pictograms

GHS05,GHS07

signalword

Danger

hcodes

H302,H315,H318

pcodes

P264 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 - P332 + P313

Hazard Classifications

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

Storage Class

11 - Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c