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Merck

04260

N-Ethylmaleimide

purum p.a., ≥99.0% (HPLC)

Synonym(s):

NEM

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About This Item

Empirical Formula (Hill Notation):
C6H7NO2
CAS Number:
128-53-0
Molecular Weight:
125.13
NACRES:
NA.26
PubChem Substance ID:
329747901
UNSPSC Code:
12352209
EC Number:
204-892-4
MDL number:
MFCD00005509
Beilstein/REAXYS Number:
112448

Key Documents

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Product Name

N-Ethylmaleimide, purum p.a., ≥99.0% (HPLC)

SMILES string

CCN1C(=O)C=CC1=O
CCN1C(=O)C=CC1=O

InChI key

HDFGOPSGAURCEO-UHFFFAOYSA-N

InChI

1S/C6H7NO2/c1-2-7-5(8)3-4-6(7)9/h3-4H,2H2,1H3

grade

purum p.a.

assay

≥99.0% (HPLC)

ign. residue

≤0.05%

bp

210 °C (lit.)

mp

43-46 °C (lit.)
43-46 °C

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤100 mg/kg
Na: ≤100 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

storage temp.

2-8°C

Quality Level

200

Gene Information

human ... SLC6A3(6531), SLC6A4(6532)

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Application

N-Ethylmaleimide has been used to measure low molecular weight thiols bound to plasma proteins.
Reagent for the covalent modification of cysteine residues in proteins.

Biochem/physiol Actions

Augments currents from native M-channels in sympathetic neurons and acts as an opener for KCNQ2, KCNQ4 and KCNQ5 channels.
Sulfhydryl alkylating agent that inactivates NADP-dependent isocitrate dehydrogenase and many endonucleases.

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 2 Oral - Acute Tox. 3 Dermal - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

flash_point_f

163.2 °F - closed cup

flash_point_c

72.9 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

04260-25G-F: + 04260-5G-F: + 04260-BULK-F: + 04260-VAR-F:

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN6714
BCCM8603
BCCM2417
BCCM2232
BCCK0315

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