Duran Erlenmeyer flask, narrow neck, 25 ml, graduated

Product information "Duran Erlenmeyer flask, narrow neck, 25 ml, graduated"

A quick swirl and the solution is mixed, without anything spilling over: that is exactly what the Erlenmeyer flask is designed for. The Erlenmeyer flask from Duran is a classic piece of laboratory equipment: Its conical shape makes it easy to mix liquids by swirling, without the contents splashing out. Made from high-quality borosilicate glass 3.3, it offers excellent chemical resistance and high operating temperatures.

Typical applications

Preparation and mixing of solutions by swirling
Titrations and volumetric analyses
Cultivation of microorganisms in shaking cultures (narrow-necked, with stopper)
Heating and brief boiling of liquids
Storage with a stopper (narrow-necked) or easy filling and cleaning (wide-necked)
Use in chemistry, microbiology, analysis and education

Material and thermal properties

Borosilicate glass 3.3 is largely resistant to water, acids, alkalis and most organic substances. The uniform wall thickness and low thermal expansion ensure high thermal shock resistance; the flask is therefore particularly suitable for applications involving high temperatures and rapid temperature changes.

Narrow-neck or wide-neck?

Select the suitable neck shape above:

Narrow-neck (according to DIN ISO 1773): The narrow neck reduces evaporation and makes it easier to seal with a stopper, suitable for storage, titration and cultures.
Wide-neck (according to DIN EN ISO 24450): The wide opening makes it easier to fill, weigh in solids and clean.

Graduation and marking

An easy-to-read, printed scale allows the fill volume to be estimated. The fired-on white ceramic print (scale and labelling field) is particularly resistant to abrasion and chemicals and withstands repeated autoclaving and rinsing.

Standards

Narrow-neck version according to DIN ISO 1773, wide-neck version according to DIN EN ISO 24450. Due to production constraints, some intermediate sizes are non-DIN/ISO sizes, but are technically equivalent.

Size overview

Neck shape	Volume	Ø (mm)	Height (mm)	Pack size
Narrow-neck	25 ml	42	75	10
Narrow-neck	50 ml	51	90	10
Narrow-neck	100 ml	64	105	10
Narrow-neck	125 ml	67	112	10
Narrow-neck	200 ml	79	131	10
Narrow-neck	250 ml	85	145	10
Narrow-neck	300 ml	87	156	10
Narrow-neck	500 ml	105	180	10
Narrow-neck	800 ml	120	200	10
Narrow-neck	1,000 ml	131	220	10
Narrow-neck	2,000 ml	166	280	10
Narrow-neck	3,000 ml	187	310	2
Narrow-neck	5,000 ml	220	365	1
Wide-neck	25 ml	43	70	10
Wide-neck	50 ml	51	85	10
Wide-neck	100 ml	64	105	10
Wide-neck	200 ml	79	131	10
Wide-neck	250 ml	85	140	10
Wide-neck	300 ml	87	156	10
Wide-neck	500 ml	105	175	10
Wide-neck	1,000 ml	131	220	10
Wide-neck	2,000 ml	153	276	10

Scope of delivery

Duran Erlenmeyer flask in the selected neck shape and size, with printed scale
Without stopper/closure (available separately)
Sales unit: 10 pieces (carton); 3,000 ml narrow-neck = 2 pieces, 5,000 ml narrow-neck = 1 piece

Individual requirements and procurement service

Do you require suitable stoppers, other Duran glassware or larger quantities? We’d be happy to assist you via our procurement service.

Neck shape:	Narrow neck
Volume:	25 ml