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Merck
CN

707066

DCA Deblock (0.36M dichloroacetic acid in toluene)

Synonym(s):

DCA Deblock, DEBLOCK (0.36M dichloroacetic acid in toluene)

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About This Item

Empirical Formula (Hill Notation):
C2H2Cl2O2
CAS Number:
79-43-6
Molecular Weight:
128.94
UNSPSC Code:
12352106
PubChem Substance ID:
329762686
MDL number:
MFCD00004223
Concentration:
≤100 ppm in H2O
Form:
liquid

Key Documents

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InChI

1S/C2H2Cl2O2/c3-1(4)2(5)6/h1H,(H,5,6)

SMILES string

OC(=O)C(Cl)Cl

InChI key

JXTHNDFMNIQAHM-UHFFFAOYSA-N

form

liquid

concentration

≤100 ppm in H2O

bp

110-111 °C

density

0.884 g/mL at 25 °C

Quality Level

100

Related Categories

General description

Deblock solution, containing dichloroacetic acid (DCA) in dichloromethane or Toluene, removes the dimethoxytrityl (DMT) protecting the group from the 5′ hydroxyl moiety of nucleotides already incorporated into the growing nucleic acid, prior to the addition of the next phosphoramidite. Removal of the DMT allows the unprotected 5′ hydroxyl moiety to react with a new phosphoramidite in a subsequent extension reaction.

Application

DCA Deblock (0.36M dichloroacetic acid in toluene) is suitable for the removal of 4,4Adimethoxytrityl (DMTr) protecting groups for the synthesis of antisense oligonucleotides in high yield and purity.

signalword

Danger

Hazard Classifications

Aquatic Chronic 3 - Asp. Tox. 1 - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Lact. - Repr. 1B - Skin Irrit. 2 - STOT RE 2 Inhalation - STOT SE 3

target_organs

Central nervous system

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

41.0 °F

flash_point_c

5 °C

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
SHBS5146
SHBR5076
SHBP8673
SHBN9651
SHBN8829

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Synthesis of an antisense oligonucleotide targeted against C-raf kinase: efficient oligonucleotide synthesis without chlorinated solvents
A H Krotz and D L Cole V T Ravikumar
Bioorganic & Medicinal Chemistry, 7(3), 435-439 (1999)
A H Krotz et al.
Bioorganic & medicinal chemistry, 7(3), 435-439 (1999-04-29)
It is demonstrated that a solution of dichloroacetic acid in toluene removes dimethoxytrityl groups from the 5'-terminus of an antisense phosphorothioate oligodeoxyribonucleotide (ISIS 5132/CGP69846A) during synthesis on solid support cleanly and efficiently. It is therefore suggested to replace health hazardous
Mehdi D Esrafili
Journal of molecular modeling, 18(12), 5005-5016 (2012-06-28)
A theoretical study was performed to examine hydrogen and halogen bonds properties in gas phase and crystalline dichloroacetic acid (DCAA). The specific pattern of O-H∙∙∙O, C-H∙∙∙O, HCl, Cl∙∙∙O and Cl∙∙∙Cl interactions in DCAA dimers is described within the quantum theory
Yi-Hsueh Chuang et al.
Water research, 47(3), 1308-1316 (2013-01-05)
The direct incorporation of chloramines and dissolved organic nitrogen (DON) may provide the nitrogen for nitrogenous disinfection byproducts (N-DBPs). This study explores the contributions of natural DON and chloramine incorporation to the formation of N-DBPs during chloramination. This study also
Alfredo Caro-Maldonado et al.
Journal of immunology (Baltimore, Md. : 1950), 192(8), 3626-3636 (2014-03-13)
B cell activation leads to proliferation and Ab production that can protect from pathogens or promote autoimmunity. Regulation of cell metabolism is essential to support the demands of lymphocyte growth and effector function and may regulate tolerance. In this study
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