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Amberlyst® A21 free base

ALDRICH/216410 - free base

Synonym: weak anion exhange resin (DMA)

MDL Number: MFCD00145842
Product Type: Chemical

Catalog Number PKG Qty. Price Quantity
45-216410-250G 250 g
$125.00
1/EA
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45-216410-1KG 1 kg
$393.00
1/EA
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autoignition temp. 800 °F
capacity 1.3 meq/mL by wetted bed volume
form beads
matrix styrene divinylbenzene (macroporous)
matrix active group dimethylamino
moisture 56-62%
particle size 22-30 mesh
  490-690 μm
Quality Level 100 
separation technique anion exchange
technique(s) LPLC: suitable
vapor density <1 (vs air)
vapor pressure 17 mmHg ( 20 °C)
Application: Amberlyst® A21 free base was used in catalyst preparation.
Features and Benefits: Weakly basic, macroreticular resin with alkyl amine functionality.
General description: Amberlyst A21 is a neutral ion-exchange resin and a solid base which catalyses three-component reaction of aldehyde and malononitrile with various active methylene compounds to synthesize a range of pyran annulated heterocycles. Use of the solid base is to generate a highly green protocol by eliminating chromatographic purification involving hazardous organic solvents, and for easy recovery and reusability of the catalyst. Amberlyst A21 is used as a fluid bed resin. Fluid bed reactor allows gel-type beads, of polymer-supported (PS) organic reactions, to be used in a flow system. The Michael reaction between methyl 1-oxoindan-2-carboxylate and methyl vinyl ketone in toluene can be attained through a fluid bed of Amberlyst A21 at 50°C.
Legal Information: Amberlyst is a registered trademark of The Dow Chemical Company or an affiliated company of Dow
Packaging: 1 kg in poly bottle
Packaging: 5, 250 g in poly bottle
RIDADR NONH for all modes of transport
WGK Germany WGK 3
Flash Point(F) Not applicable
Flash Point(C) Not applicable
UNSPSC 23151817

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