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

Name: Brown glass volumetric flask (Class A, standard polypropylene stopper) (high-borosilicate glass)
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

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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lbt@lbt.ltd

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+86-15102211717

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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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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

Which materials can be measured by your Vicat softening point tester?

It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

Customer Reviews

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From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

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“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

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