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Merck
CN

422363

Diketene

contains copper sulfate as stabilizer

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About This Item

Empirical Formula (Hill Notation):
C4H4O2
CAS Number:
674-82-8
Molecular Weight:
84.07
EC Number:
211-617-1
UNSPSC Code:
12352100
PubChem Substance ID:
24866429
Beilstein/REAXYS Number:
104541
MDL number:
MFCD00005173

Key Documents

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Product Name

Diketene, contains copper sulfate as stabilizer

InChI key

WASQWSOJHCZDFK-UHFFFAOYSA-N

InChI

1S/C4H4O2/c1-3-2-4(5)6-3/h1-2H2

SMILES string

C=C1CC(=O)O1

vapor density

2.9 (vs air)

vapor pressure

7.9 mmHg ( 20 °C)

form

liquid

autoignition temp.

590 °F

contains

copper sulfate as stabilizer

refractive index

n20/D 1.439 (lit.)

bp

69-70 °C/100 mmHg (lit.)

density

1.09 g/mL at 25 °C (lit.)

storage temp.

2-8°C

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Application

Employed in the convenient preparation of acetoacetic acid derivatives and heterocycles.

pictograms

FlameSkull and crossbones
GHS02,GHS06

signalword

Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 4 Oral - Flam. Liq. 3

Storage Class

3 - Flammable liquids

wgk

WGK 1

flash_point_f

93.2 °F - closed cup

flash_point_c

34 °C - closed cup

ppe

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

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
15504KB
15328AG
09920CR
08721HG
07812EI

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A Fotedar et al.
Clinical and experimental immunology, 49(2), 317-324 (1982-08-01)
Two acetoacetylated derivatives of Mycobacterium leprae with variable hapten groups and a conjugate with tetanus toxoid were prepared. These were tested as antigens along with unmodified M. leprae in the leucocyte migration inhibition response of leucocytes from clinically, bacteriologically and
P Roch et al.
Biochimica et biophysica acta, 983(2), 193-198 (1989-08-07)
The hemolytic activity exhibited by the coelomic fluid of the Annelid Eisenia fetida andrei is mediated by two lipoproteins of mass 40 and 45 kDa, each of them capable of hemolysis. Such an activity is not inhibited by zymosan, inulin
K Tanizawa et al.
Chemical & pharmaceutical bulletin, 37(3), 824-825 (1989-03-01)
Compounds having a structural analogy with diketene have been synthesized and their potencies as beta-lactamase inhibitors have been studied. Among six compounds so far tested, alpha-phenyl-beta-benzylidene-3-propanolide was shown to be an irreversible inhibitor of the enzyme. The availability of simple
R Scandurra et al.
FEBS letters, 231(1), 192-196 (1988-04-11)
Horse liver phosphopantothenoylcysteine decarboxylase (EC 4.1.1.36) is rapidly inactivated by N-acetoacetylation with diketene following a pseudo-first-order kinetics: the presence of substrate quantitatively protects against this inactivation. Histidine photo-oxidation with methylene blue or rose bengal brings about the total loss of
Nasrin Zohreh et al.
Journal of combinatorial chemistry, 12(4), 497-502 (2010-06-10)
An efficient and simple route for preparation of substituted 1,5-benzodiazepine-2-one containing peptoid backbone is presented. The classical Ugi reaction is considerably extended by application of o-phenylenediamine and diketene as amine and oxo component. 1,3-Dihydro-1,5-benzodiazepine-2-one is generated in situ from these
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