Propionic anhydride for synthesis

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Propionic anhydride is used as a esterifying reagent and as a reagent in organic synthesis.

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(1983) performed chromatography on a Spherisorb nitrile column with a mobile phase of 0.01 M phosphoric acid in acetonitrile / water (80:20).

Propionic anhydride used as an intermediate to produce dyes, pharmaceuticals, agrochemicals and other organic compounds.

SPECIFICATION

APPEARANCE : clear liquid
CONTENT : 98.0% min

PROPIONIC ACID : 2.0% max

OTHER INDIVIDUAL IMPURITY : 0.5% max
COLOR : 20 max (Pt/Co scale)
PACKING : 200lgs in drum
HAZARD : CLASS 8 (Packing group : III)

GENERAL DESCRIPTION OF ANHYDRIDE
Anhydride is a compound formed by the abstraction of a molecule of water, H2O, from a substance.


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Alternatively, Hsu & Ho (1989) used a reverse phase phenyl column with a mobile phase of 10 mM phosphate buffer containing 0.25 mM tetrabutylammonium phosphate as paired-ion source (pH 4.1).

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treatment of the dry residue with TFAA at 60°C for 30 minutes using phentermine as internal standard (LoDico et al., 1992), or with eicosan internal standard and BSTFA / 1% TMCS for 1 hour at 80°C (Frater-Schröder & Zbinden, 1975), or with p-chlorobenzaldehyde in methanol for 30 minutes at room temperature, followed by addition of p-bromobenzaldehyde isonicotinyl hydrazone internal standard (Timbrell et al., 1977).

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Alternatively, Hsu & Ho (1989) used a reverse phase phenyl column with a mobile phase of 10 mM phosphate buffer containing 0.25 mM tetrabutyl-ammonium phosphate as paired-ion source (pH 4.1).

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Electrochemical detection was at +800 mV, and diphenylcarbazide was used as internal standard. 8.2.2 Tests for biological specimens 8.2.2.1 Simple qualitative test(s)

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treatment of the dry extracted residue with TFAA at 60°C for 30 min using phentermine as internal standard (LoDico et al., 1992), or with BSTFA / 1% TMCS for 1 hour at 80°C (Frater-Schröder & Zbinden, 1975).

Propionic anhydride - an overview | ScienceDirect Topics

Chromatography was performed at ambient temperature on a Spherisorb nitrile column with a mobile phase of 0.01 M phosphoric acid in acetonitrile / water (80:20).