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00070 Sigma-Aldrich

Acetaldehyde

puriss. p.a., anhydrous, ≥99.5% (GC)

Synonym: Ethanal

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Properties

Related Categories A-B, Puriss p.a., Acacia, Aldehydes, Allium sativum (Garlic), Analytical Reagents,
biological source   from synthetic
grade   anhydrous
vapor density   1.52 (vs air)
vapor pressure   14.63 psi ( 20 °C)
InChI Key   IKHGUXGNUITLKF-UHFFFAOYSA-N
grade   puriss. p.a.
assay   ≥99.5% (GC)
autoignition temp.   365 °F
quality   anhydrous
expl. lim.   60 %
impurities   ≤0.5% free acid (as CH3COOH)
evapn. residue   ≤0.002%
refractive index   n20/D 1.332(lit.)
  n20/D 1.332
bp   21 °C(lit.)
mp   −125 °C(lit.)
density   0.785 g/mL at 25 °C(lit.)
cation traces   Al: ≤0.5 mg/kg
  Ba: ≤0.1 mg/kg
  Bi: ≤0.1 mg/kg
  Ca: ≤0.5 mg/kg
  Cd: ≤0.05 mg/kg
  Co: ≤0.02 mg/kg
  Cr: ≤0.02 mg/kg
  Cu: ≤0.02 mg/kg
  Fe: ≤0.5 mg/kg
  K: ≤0.5 mg/kg
  Li: ≤0.1 mg/kg
  Mg: ≤0.1 mg/kg
  Mn: ≤0.02 mg/kg
  Mo: ≤0.1 mg/kg
  Na: ≤0.5 mg/kg
  Ni: ≤0.02 mg/kg
  Pb: ≤0.1 mg/kg
  Sr: ≤0.1 mg/kg
  Zn: ≤0.1 mg/kg
storage temp.   2-8°C

Description

Caution

forms easily paraldehyde

Other Notes

Same product — same quality — now Sigma-Aldrich brand

Application

Acetaldehyde may be used for the enzymatic synthesis of fatty acids.

It was used in the plasma polymerization for deposition of reactive aldehyde groups onto substrate, in a study to produce fibrous biomaterials with cell adhesive and also repulsive capability in biomedical applications. It was also used as calibration standard during determination of acetone, acetaldehyde, ethanol, and methanol in different human matrices, such as whole blood, vitreous humour, and urine using gas chromatography with flame ionization detection method (GC–FID).

General description

Acetaldehyde is an organic colorless flammable liquid. It can be produced by hydration of acetylene and by catalytic oxidation of ethyl alcohol. It is mainly used in manufacturing acetic acid.

Mechanism of the thermal decomposition of acetaldehyde has been reported. It is a product of ethanol metabolism in the liver, binds covalently to various proteins, thereby alters the liver function and structure. The aldol condensation of acetaldehyde and heptanal in the presence of hydrotalcite-type catalysts has been described.

Price and Availability

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
RIDADR 
UN1089 - class 3 - PG 1 - Acetaldehyde
WGK Germany 
1
RTECS 
AB1925000
Flash Point(F) 
-40 °F
Flash Point(C) 
-40 °C
Protocols & Articles

Articles

Pyruvate Transformations

Depending on the environmental conditions, e.g. whether oxygen is present or not, pyruvate, a product of glucose metabolism, can undergo different biotransformations as shown in Figure 2. Under reduc...
BioFiles 2007, 2.6, 10.
Keywords: Anaerobic, Biofiles, Catalysis, Environmental, Metabolism

Peer-Reviewed Papers
15

References

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