Corning® Pyrex® Short Neck Round-Bottom Boiling Flasks

These Pyrex® round bottom boiling flasks have full length outer ST 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. The normal working temperature for Pyrex® boiling flasks is 230°C. Adapter Cat.Nos. 1-8800, 1-8820 and 1-8825 are used to connect flasks with different size joints, thus allowing numerous combinations for diverse assemblies.

Some flasks are also replacement parts for Corning® organic chemistry kits Cat.Nos. 1-6949, 1-6949K, and 1-6949M.

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Cat.No.	Brand	Material	Name	Capac.	Joint Size	O.D.	Height	Addl. Info.	PK		Seal Color	CS
1-4322-5	Pyrex®	Borosilicate glass		5mL	14/10			Replacement flask for 1-6949M, with cap				$501.65 12/CS		Add To Favorites
1-4322-10	Pyrex®	Borosilicate glass		10mL	14/10			Replacement flask for 1-6949M, with cap				$503.81 12/CS		Add To Favorites
1-4321A-25	Pyrex®	Borosilicate glass		25mL	14/20	42mm	70mm	Replacement flask for 1-6949K				$37.77 1/CS		Add To Favorites
1-4321A-50	Pyrex®	Borosilicate glass		50mL	14/20	49mm	84mm	Replacement flask for 1-6949K				$37.77 1/CS		Add To Favorites
1-4321A-100	Pyrex®	Borosilicate glass		100mL	14/20	65mm	95mm	Replacement flask for 1-6949K	$59.90 1/PK		Add To Favorites	$488.17 12/CS		Add To Favorites
1-4321A-250	Pyrex®	Borosilicate glass		250mL	14/20	83mm	114mm	Replacement flask for 1-6949K				$61.78 1/CS		Add To Favorites
1-4321A-500	Pyrex®	Borosilicate glass		500mL	14/20	102mm	137mm	Replacement flask for 1-6949K				$67.13 1/CS		Add To Favorites
1-4320B-25	Pyrex®	Borosilicate glass		25mL	19/22	42mm	72mm	Replacement flask for 1-6949				$41.84 1/CS		Add To Favorites
1-4320B-50	Pyrex®	Borosilicate glass		50mL	19/22	49mm	81mm	Replacement flask for 1-6949				$42.20 1/CS		Add To Favorites
1-4320B-100	Pyrex®	Borosilicate glass		100mL	19/22	65mm	95mm	Replacement flask for 1-6949	$110.24 2/PK		Add To Favorites	$449.27 12/CS		Add To Favorites
1-4320B-250	Pyrex®	Borosilicate glass		250mL	19/22	83mm	120mm	Replacement flask for 1-6949				$50.16 1/CS		Add To Favorites
1-4320B-500	Pyrex®	Borosilicate glass		500mL	19/22	102mm	139mm	Replacement flask for 1-6949				$58.33 1/CS		Add To Favorites
1-4320-50	Pyrex®	Borosilicate glass		50mL	19/38	49mm	98mm					$530.91 12/CS		Add To Favorites
1-4321-100	Pyrex®	Borosilicate glass		100mL	29/42	63mm	120mm					$50.60 1/CS		Add To Favorites
1-4321-250	Pyrex®	Borosilicate glass		250mL	29/42	83mm	140mm					$53.59 1/CS		Add To Favorites
1-4321-500	Pyrex®	Borosilicate glass		500mL	29/42	102mm	157mm					$57.80 1/CS		Add To Favorites
1-4321-1L	Pyrex®	Borosilicate glass		1000mL	29/42	130mm	185mm					$60.68 1/CS		Add To Favorites
1-4320A-50	Pyrex®	Borosilicate glass		50mL	24/40	49mm	98mm					$419.45 12/CS		Add To Favorites
1-4320-100	Pyrex®	Borosilicate glass		100mL	24/40	65mm	120mm	Replacement flask for 1-6949	$98.27 2/PK		Add To Favorites	$400.43 12/CS		Add To Favorites
1-4320-250	Pyrex®	Borosilicate glass		250mL	24/40	83mm	140mm	Replacement flask for 1-6949	$106.51 2/PK		Add To Favorites	$433.64 12/CS		Add To Favorites
1-4320-300	Pyrex®	Borosilicate glass		300mL	24/40	87mm	145mm	Replacement flask for 1-6949				$602.56 12/CS		Add To Favorites
1-4320-500	Pyrex®	Borosilicate glass		500mL	24/40	102mm	160mm	Replacement flask for 1-6949	$114.47 2/PK		Add To Favorites	$466.46 12/CS		Add To Favorites
1-4320-1L	Pyrex®	Borosilicate glass		1000mL	24/40	127mm	189mm		$67.87 1/PK		Add To Favorites	$553.21 12/CS		Add To Favorites
1-4320-2L	Pyrex®	Borosilicate glass		2000mL	24/40	162mm	220mm		$111.69 1/PK		Add To Favorites	$455.12 6/CS		Add To Favorites
1-4320-5L	Pyrex®	Borosilicate glass		5000mL	45/50	221mm	300mm					$875.12 4/CS		Add To Favorites
1-4320-12L	Pyrex®	Borosilicate glass		12000mL	55/50	295mm	385mm					$412.26 1/CS		Add To Favorites