Boiling Flask, Round Bottom

Photo of Corning 4280 PYREX® Long Neck Boiling Flasks with Round Bottom and Tooled Neck

These PYREX® round bottom boiling flasks have long necks with tooled mouths and use rubber stoppers for sealing. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C.

Photo of Corning 4260 PYREX® Short Ring Neck Boiling Flasks with Round Bottom

These PYREX® round bottom boiling flasks have short ring necks and are designed to be used with rubber stoppers. These ring neck boiling flasks are precisely tooled for uniform stopper fit. The reinforced rim increases mechanical strength. These flasks are used in applications requiring rigid stoppering and as wash bottles in routine lab washing. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance.

Photo of Corning 4320 PYREX® Short Neck Boiling Flasks with Round Bottom and 19/38 Standard Taper Joint

These PYREX® round bottom boiling flasks have full length standard taper outer joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C. Corning Adapter Nos.

Photo of Corning 4321 PYREX® Short Neck Boiling Flask with Round Bottom and 29/42 Standard Taper Joint

These PYREX® round bottom boiling flasks have full length outer 29/42 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C. Corning Adapter Nos.

Photo of Corning 4320B PYREX® Short Neck Boiling Flask with Round Bottom and 19/22 Standard Taper Joint

These PYREX® round bottom boiling flasks have full length outer 19/22 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C. Corning Adapter Nos.

Photo of Corning 4320A-50 PYREX® 50mL Short Neck Boiling Flask with Round Bottom and 24/40 Standard Taper Joint

These 50mL PYREX® round bottom boiling flasks have full length outer 24/40 joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C. Corning Adapter Nos.

Photo of Corning 4320C PYREX® Heavy Wall Short Neck Boiling Flasks with Round Bottom and Standard Taper Joint

These PYREX® heavy duty boiling flasks provide increased mechanical strength. The flask features walls which are 25-30% thicker than the standard version. O.D. dimensions have not been changed. They have full length outer Standard Taper joints, but with shorter necks. The normal working temperature for PYREX® boiling flasks is 230°C. Adapter Nos. 8800, 8820 and 8825 are used to connect flasks with different size joints, thus allowing numerous combinations for diverse assemblies.

(Sample Photo Shown. Individual items may differ from the image shown.)

 

Photo of Kimble 25276 KIMAX Round Bottom Boiling Flasks with Short Neck and 14/20 Joint

Kimble 25276 KIMAX Round Bottom Boiling Flasks with Short Neck and 14/20 Joint. This flask has a short neck and a medium length Standard Taper joint. Ref: ASTM Method D322. 

(Sample Photo Displayed. Individual items may differ from the image shown)

 

Photo of Kimble 25277 KIMAX Round Bottom Boiling Flask with Short Neck and Medium Length 19/22 Joint

Kimble 25277 KIMAX Short Neck Round Bottom Boiling Flask has a medium length Standard Taper 19/22 joint. Ref: ASTM Method D322. Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

(Sample Photo Displayed. Individual items may differ from the image shown)

 

Photo of Kimble 25200 KIMAX Round Bottom Boiling Flasks with Reinforced Tooled Top

Kimble 25200 KIMAX Round Bottom Boiling Flasks with Reinforced Tooled Top. Designed from ASTM Specification E1403, Type II, Class 1, requirements.

(Sample Photo Displayed. Individual items may differ from the image shown)

 

Photo of Kimble 25285 KIMAX Round Bottom Boiling Flask with Short Neck and Full Length 24/40 Joint

Kimble 25285 KIMAX Short Neck Round Bottom Boiling Flask has a Full Length Standard Taper 24/40 joint. Ref: ASTM Method D322. Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

(Sample Photo Displayed. Individual items may differ from the image shown)