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Brown glass volumetric flask (Class A, standard polypropylene stopper) (high-borosilicate glass)

Brown glass volumetric flasks (with polypropylene stoppers as standard for Class A) are laboratory instruments used for the precise preparation of standard solutions and for accurate volume measurements. They feature a high-borosilicate glass body paired with a polypropylene stopper and are manufactured to Class A metrological accuracy, meeting the requirements of various precision volumetric analyses.

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Glassware and Measuring Instruments

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Brown glass volumetric flask (Class A, standard polypropylene stopper) (high-borosilicate glass)

Description

Product Introduction:

Brown glass volumetric flasks (Class A, standard equipped with polypropylene stoppers) are laboratory instruments used for the precise preparation of standard solutions and for accurate volume determination. They feature a high-borosilicate glass body paired with a polypropylene stopper and are manufactured to Class A metrological accuracy, meeting the requirements of various precision volumetric analyses. Made from brown high-borosilicate glass, they are specifically designed for preparing light‑sensitive standard solutions and reagents that are prone to photodegradation. The flask body fits tightly with the ground‑glass stopper, ensuring excellent sealing to prevent evaporation and leakage of the solution.

The bottle features high transparency and excellent chemical stability, resisting acids, alkalis, thermal shock, and corrosion, and does not react with the sample solution, ensuring the purity and reliability of prepared solutions. Its single calibration mark is clear and uniform, providing precise volume measurement; the measurement values are traceable and comply with relevant standards.

This product comes standard with a polypropylene (PP) stopper, offering excellent sealing, chemical resistance, non‑stick properties, and enhanced durability. Compared to traditional glass stoppers, it is lighter, safer, less prone to breakage, requires no lubrication, and is more convenient to use—making it ideal for high‑frequency laboratory applications.

Application scenarios:

It is widely used in universities, research institutions, environmental protection agencies, the food industry, the pharmaceutical sector, the chemical industry, and third-party testing laboratories, serving as a metrological instrument for preparing standard solutions, performing precise quantitative pipetting, conducting volumetric analysis, and carrying out titration experiments.

Technical Specifications:

Single-Graduated Volumetric Flask Parameter Table

Specifications	Tolerance value	Bottle mouth inner diameter	Overall height	Minimum wall thickness	Quantity/Box	Quantity/Box
1ml	±0.010	7mm	60mm	0.7mm	10 per box	210/piece
2ml	±0.010	7mm	60mm	0.7mm	10 per box	210/piece
5ml	±0.020	7mm	75mm	0.7mm	10 per box	210/piece
10ml	±0.020	7mm	90mm	0.7mm	10 per box	210/piece
25ml	±0.03	8mm	110mm	0.7mm	10 per box	210/piece
50ml	±0.05	9mm	140mm	0.7mm	10 per box	210/piece
100ml	±0.10	13mm	170mm	0.7mm	5 per box	150 per piece
200ml	±0.15	15mm	210mm	0.8mm	2 per box	60/piece
250ml	±0.15	15mm	220mm	0.8mm	2 per box	60/piece
500ml	±0.25	18mm	270mm	0.8mm	2 per box	32/piece
1000ml	±0.40	21mm	300mm	1.0mm	2 per box	24 per item

Large-Volume Single-Graduation Volumetric Flask Specification Sheet

Specifications	Tolerance value	Bottle mouth inner diameter	Overall height	Minimum wall thickness	Quantity/Box	Quantity/Box
5ml	±0.020	9mm	75mm	1.2mm	10 per box	210/piece
10ml	±0.020	9mm	90mm	1.2mm	10 per box	210/piece
20ml	±0.03	9mm	100mm	1.2mm	10 per box	210/piece
25ml	±0.03	9mm	110mm	1.2mm	10 per box	210/piece
50ml	±0.05	13mm	140mm	1.2mm	10 per box	210/piece
100ml	±0.10	15mm	170mm	1.5mm	5 per box	150 per piece

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Brown glass volumetric flask (Class A, standard polypropylene stopper) (high-borosilicate glass)

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