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About This Item
Empirical Formula (Hill Notation):
C4H4O2
CAS Number:
Molecular Weight:
84.07
Beilstein:
104541
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
form:
liquid
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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
SMILES string
C=C1CC(=O)O1
InChI
1S/C4H4O2/c1-3-2-4(5)6-3/h1-2H2
InChI key
WASQWSOJHCZDFK-UHFFFAOYSA-N
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Application
Employed in the convenient preparation of acetoacetic acid derivatives and heterocycles.[1]
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 4 Oral - Flam. Liq. 3
Storage Class Code
3 - Flammable liquids
WGK
WGK 1
Flash Point(F)
93.2 °F - closed cup
Flash Point(C)
34 °C - closed cup
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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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
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
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
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
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