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109681

Sigma-Aldrich

N-Chlorosuccinimide

98%

Synonym(s):

1-Chloro-2,5-pyrrolidinedione, NCS

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About This Item

Empirical Formula (Hill Notation):
C4H4ClNO2
CAS Number:
128-09-6
Molecular Weight:
133.53
Beilstein:
113915
EC Number:
204-878-8
MDL number:
MFCD00005511
UNSPSC Code:
12352101
eCl@ss:
39151413
PubChem Substance ID:
24846932
NACRES:
NA.22

Assay

98%

form

solid

mp

148-150 °C (lit.)

SMILES string

ClN1C(=O)CCC1=O

InChI

1S/C4H4ClNO2/c5-6-3(7)1-2-4(6)8/h1-2H2

InChI key

JRNVZBWKYDBUCA-UHFFFAOYSA-N

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Application

N-Chlorosuccinimide (NCS) is a chlorinating and oxidizing reagent. It is more efficient when compared to other chlorinating agents, such as 1,3-dichloro-5,5-dimethylhydantoin (NDDH) and trichloroisocyanuric acid (TCCA) due to its high regioselectivity.
It can be used for:
  • Conversion of diindenylzinc agent, [Zn(ind)2(pic)2]5 into 1-chloroindene.
  • Selective cleavage of tryptophanyl peptide bonds.
  • Chemoselective oxidation of primary alcohols to aldehydes catalyzed by 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) in the presence of tetrabutylammonium chloride under bi-phasic conditions.
  • Conversion of primary amides and aldoximes to their corresponding nitriles in the presence of triphenylphosphine.
  • α-Chlorination of acyl-chlorides.
  • Conversion of benzylic sulfides into α-chloro sulfides.

Signal Word

Danger

Hazard Statements

H290,H302,H314,H335,H410

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

8A - Combustible corrosive hazardous materials

WGK

WGK 2

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’.

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Efficient and highly selective oxidation of primary alcohols to aldehydes by N-chlorosuccinimide mediated by oxoammonium salts.
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Chlorination of benzylic sulfides with N-chlorosuccinimide.
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