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43780

Sigma-Aldrich

Dimethyl 3,3′-dithiopropionimidate dihydrochloride

purum, ≥95.0% (AT)

Synonym(s):

DTBP, Dimethyl 3,3′-dithio-bis(propionimidate) dihydrochloride, Wang/Richards’ reagent

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About This Item

Empirical Formula (Hill Notation):
C8H16N2O2S2 · 2HCl
CAS Number:
38285-78-8
Molecular Weight:
309.28
MDL number:
MFCD00043245
UNSPSC Code:
12352000
PubChem Substance ID:
24867398
Pricing and availability is not currently available.

grade

purum

Assay

≥95.0% (AT)

storage temp.

2-8°C

SMILES string

Cl.Cl.COC(=N)CCSSCCC(=N)OC

InChI

1S/C8H16N2O2S2.2ClH/c1-11-7(9)3-5-13-14-6-4-8(10)12-2;;/h9-10H,3-6H2,1-2H3;2*1H

InChI key

CQBCVFHLZAVNPF-UHFFFAOYSA-N

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Application

A homobifunctional, cleavable cross-linking reagent. Typically, reacted with primary amines in the pH range 7.0-10.0 to form amidine bonds.
Reactant for:
  • Synthesis of glutathione-sensitive cross-linked polyethylenimine gene vector
  • Preparation of cyclodextrin-containing polymers designed for gene delivery
  • Crosslinking of chick oviduct progesterone-receptor subunits

Caution

The reagant is readily hydrolyzed at neutral pH. Avoid use of reducing agents during coupling reactions.

Analysis Note

product decomposes at 111-115°C, residual melts at 160-164°C

Other Notes

Note that the amidine linkage preserves original primary amine positive charge. The disulfide linkage is cleavable by mild reduction. Incorporates an eight atom linker.
Cleavable bifunctional reagent used for cross-linking of membrane proteins and hemoglobin[1]; For the preparation of an activated solid support[2]; Cross-linking of a cytochrome oxidase complex[3]

replaced by

Product No.
Description
Pricing

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315

Hazard Classifications

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

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Isolation of human erythrocyte membranes and their outer surface proteins by covalent fractionation on solid support.
Y Eshdat et al.
FEBS letters, 101(1), 43-46 (1979-05-01)
K Wang et al.
The Journal of biological chemistry, 250(16), 6622-6626 (1975-08-25)
Dimethyl-3,3'-dithiobispropionimidate penetrates intact human erythrocytes and cross-links many of the membrane proteins to hemoglobin as well as to each other. The cross-linked complexes so produced have been analyzed by both one- and two-dimensional sodium dodecyl sulfate polyacrylamide gel electrophoresis, making
K Satoh et al.
Biochemistry, 40(2), 314-319 (2001-01-10)
We investigated whether the assembly/disassembly of the 26S proteasome is regulated by phosphorylation/dephosphorylation. The regulatory complex disassembled from the 26S proteasome was capable of phosphorylating the p45/Sug1/Rpt6 subunit, suggesting that the protein kinase is activated upon dissociation of the 26S
[Covalently cross-linked, functionally active complex of cholesterol-hydroxylating cytochrome P-450 with adrenodoxin].
S A Usanov et al.
Doklady Akademii nauk SSSR, 280(6), 1487-1491 (1985-01-01)
R G Painter et al.
Journal of cellular biochemistry, 27(3), 277-290 (1985-01-01)
When intact platelets are incubated at 37 degrees C with Concanavalin A (ConA), the two major surface membrane proteins GPIIb and III become associated with the Triton-insoluble cytoskeleton. Preincubation of platelets with a variety of metabolic inhibitors, including cytochalasin B
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