Glassware Catalog

Dewars - Sigma-Aldrich Glassware Catalog

 

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Low formWide-mouthNarrow-mouthAldrich high-efficiency cold trap/Dewar • Aldrich NMR-tube Dewar flask



Low form

For use in reactions requiring low temperatures and magnetic stirring. Shallow design in hemispherical or cylindrical (semiflat bottom) configurations. Borosilicate glass with protective outer aluminum housing.


Cap. (mL)
I.D. (cm)
Depth (cm)
Catalog Number

Hemispherical
2,100
7
3
2,150
8
4
2,275
10
5.5
2,600
14
6.5

Cylindrical
150
8
3.5
220
6.5
6.5
350
8
7.5
550
10.5
9
850
13
7.5
2,500
17
13.5


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Wide-mouth

Borosilicate glass with protective aluminum or plastic mesh housing and extended aluminum base weighted for stability.

Cap. (mL)
I.D. (cm)
Depth (cm)
Catalog Number

A. Aluminum housing
350
7.0
11.3
665
7.0
19.5
1,000
7.0
30.2
1,900
12.0
19.8
4,300
14.3
30.0

B. Plastic mesh housing
350
7.0
12.5
665
7.0
19.5
1,000
7.0
30.2
1,900
12.0
19.8
4,300
14.3
30.0

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Narrow-mouth

Cap. (mL)
I.D. (cm)
Depth (cm)
Neck I.D. (cm)
Catalog Number
A. Aluminum housing, extended aluminum base
 

 

440
6.1
19.5
3.3
B. Spherical, extended aluminum base
 


2,000
15.8
-
3.2
5,000
21.6
-
5.3
C. Dewar caddies
 


for Z12,072-3
 
 
 
for Z12,073-1
 
 
 


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Aldrich high-efficiency cold trap/Dewar

Extremely efficient design minimizes warming of liquid nitrogen or dry ice/acetone coolant that is added through a side port in the wall of the Dewar and then plugged with a vented stopper. Dewar approx. 325mm L. Order cold-finger separately, below, to seal in the coolant.



Description
Catalog Number
A. Dewar
B. Cold-fingers, S.T. 45/50 joint
B. Standard
B. Silvered and evacuated


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Aldrich NMR-tube Dewar flask

Borosilicate glass with protective aluminum housing is designed for freezing NMR samples in vacuum-thaw work. Attaches to lattice rack with clamp. Compact size minimizes volume of liquid nitrogen required. 2.0 i.d. x 23cm D.



Z24,729-4









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