Volumetric Flask
Volumetric Flask — Class A Precision Laboratory Glassware Manufacturer
A Volumetric Flask is an essential piece of volumetric laboratory glassware designed to prepare solutions with the highest accuracy. Built for reliability and precision, it features a flat bottom, long narrow neck, and an etched calibration line (meniscus mark) for exact volume measurement. Typically made of chemically resistant borosilicate glass or inert-grade plastic, volumetric flasks are designed to provide durability, dimensional stability, and exceptional measurement consistency — even under repeated laboratory use.
What Is a Volumetric Flask Used For?
Volumetric flasks are used to prepare standard solutions and perform accurate dilutions in research, manufacturing, and quality-control laboratories. Common applications include:
Preparation of standard and primary solutions
Quantitative chemical analysis and titration
Calibration of analytical instruments
Precise reagent and buffer formulation
Sample preparation for pharmaceutical, biological, and food testing
Their ability to deliver exact concentration and reproducible results makes them indispensable for analytical chemistry and test method validation.
Types of Volumetric Flasks
We offer a comprehensive range of volumetric flasks designed to meet industrial and academic standards. Each flask is designed to comply with ASTM E288, ISO 1042, and USP Class A/B accuracy specifications.
Class A Volumetric Flask – Offers the utmost precision, individually calibrated and supplied with a traceable certificate. Ideal for quality-critical and analytical applications.
Class B Volumetric Flask – Suitable for general laboratory work where slightly lower accuracy is acceptable. Economical choice for educational settings and routine tasks.
Available Variants
Clear Borosilicate Glass Flasks with Glass or Plastic Stopper
Amber Glass Flasks for Light-Sensitive Solutions
Snap-Cap Volumetric Flasks for Frequent Use
Individually Certified or Batch-Certified Flasks with QR/Barcode Traceability
Size Range and Capacity Options
Choose from a complete range of volumetric flask capacities – from 2 mL mini flasks for valuable reagents to 5000 mL industrial-grade flasks for production-scale solution preparation.
Common volumes: 10 mL, 25 mL, 50 mL, 100 mL, 250 mL, 500 mL, 1000 mL, 2000 mL, and 5000 mL.
Each flask is marked with a fine, permanent calibration line to indicate the exact contained volume at 20°C, supporting consistency across laboratories worldwide.
Why Our Volumetric Flasks Are More Accurate
Our flasks are precision-calibrated using automated gravimetric measurement systems at controlled temperatures. The narrow neck allows fine-level adjustments to the meniscus line, minimizing parallax error and supporting highly reproducible volume readings.
Key accuracy advantages:
Single sharp calibration mark with narrow neck for fine adjustments
Graduations applied with acid-etch resistant ceramic ink
Borosilicate 3.3 glass for minimal expansion under varying temperatures
Optional amber coating for UV-sensitive reagents
Tolerance values comply strictly with Class A standards (e.g., ±0.02 mL for 10 mL flasks, ±0.30 mL for 1 L flasks).
How to Use a Volumetric Flask Correctly
Add solute to the flask.
Fill with solvent up to just below the mark.
Adjust precisely to the calibration line dropwise using a pipette.
Stopper and mix thoroughly by inverting several times.
For precise work, ensure the solution temperature is maintained at 20°C — the reference temperature for calibration.
Care, Cleaning, and Longevity
To preserve accuracy:
Rinse before use with the intended solvent.
Wash with mild detergent, gently brush if required.
Rinse 3–4 times with distilled water and air-dry inverted.
Store securely with its stopper in a clean, dry cabinet.
With proper care, borosilicate volumetric flasks are designed for long-term laboratory service. Osmosis Scientific is not liable for calibration deviations caused by improper cleaning, physical damage, or wear after delivery.
Calibration and Certification
Each flask is calibrated in compliance with ISO/IEC 17025 guidelines and may be supplied with a traceable calibration certificate. Batch-certified and individually certified options are available, with electronic versions compatible with LIMS systems for digital recordkeeping. Flasks can also include NABL-accredited calibration certificates upon request.
(Note: For outsourced certified products, certification validity, calibration accuracy, and traceability remain the sole responsibility of the original manufacturer or issuing certification body.)
Features at a Glance
Single precise calibration mark (meniscus line)
High chemical and thermal resistance
Available in clear or amber glass
Class A and Class B certification options
Supplied with glass stopper or snap cap
Optional QR/Barcode traceability
Long service life with low maintenance
Why Choose Our Volumetric Flasks?
Our volumetric flasks deliver superior performance through:
Borosilicate 3.3 glass construction to resist chemical attack and heat shock
Individually verified accuracy, supporting dependable results every time
Laser-etched printing that withstands repeated washing and sterilization
Custom calibration and branding options available for institutional or industrial orders
Every flask undergoes stringent quality inspection, designed to ensure only measurement-correct, defect-free products reach your lab.
Compatible Instruments Our volumetric flasks are compatible with magnetic stirrers, incubator shakers, and automated titration systems for complete workflow efficiency. Ideal for use in validated analytical setups in pharmaceutical, R&D, and food testing environments.
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Buy now This product has multiple variants. The options may be chosen on the product page
Volumetric Flask — Class A Precision Laboratory Glassware Manufacturer
A Volumetric Flask is an essential piece of volumetric laboratory glassware designed to prepare solutions with the highest accuracy. Built for reliability and precision, it features a flat bottom, long narrow neck, and an etched calibration line (meniscus mark) for exact volume measurement. Typically made of chemically resistant borosilicate glass or inert-grade plastic, volumetric flasks are designed to provide durability, dimensional stability, and exceptional measurement consistency — even under repeated laboratory use.
What Is a Volumetric Flask Used For?
Volumetric flasks are used to prepare standard solutions and perform accurate dilutions in research, manufacturing, and quality-control laboratories. Common applications include:
Preparation of standard and primary solutions
Quantitative chemical analysis and titration
Calibration of analytical instruments
Precise reagent and buffer formulation
Sample preparation for pharmaceutical, biological, and food testing
Their ability to deliver exact concentration and reproducible results makes them indispensable for analytical chemistry and test method validation.
Types of Volumetric Flasks
We offer a comprehensive range of volumetric flasks designed to meet industrial and academic standards. Each flask is designed to comply with ASTM E288, ISO 1042, and USP Class A/B accuracy specifications.
Class A Volumetric Flask – Offers the utmost precision, individually calibrated and supplied with a traceable certificate. Ideal for quality-critical and analytical applications.
Class B Volumetric Flask – Suitable for general laboratory work where slightly lower accuracy is acceptable. Economical choice for educational settings and routine tasks.
Available Variants
Clear Borosilicate Glass Flasks with Glass or Plastic Stopper
Amber Glass Flasks for Light-Sensitive Solutions
Snap-Cap Volumetric Flasks for Frequent Use
Individually Certified or Batch-Certified Flasks with QR/Barcode Traceability
Size Range and Capacity Options
Choose from a complete range of volumetric flask capacities – from 2 mL mini flasks for valuable reagents to 5000 mL industrial-grade flasks for production-scale solution preparation.
Common volumes: 10 mL, 25 mL, 50 mL, 100 mL, 250 mL, 500 mL, 1000 mL, 2000 mL, and 5000 mL.
Each flask is marked with a fine, permanent calibration line to indicate the exact contained volume at 20°C, supporting consistency across laboratories worldwide.
Why Our Volumetric Flasks Are More Accurate
Our flasks are precision-calibrated using automated gravimetric measurement systems at controlled temperatures. The narrow neck allows fine-level adjustments to the meniscus line, minimizing parallax error and supporting highly reproducible volume readings.
Key accuracy advantages:
Single sharp calibration mark with narrow neck for fine adjustments
Graduations applied with acid-etch resistant ceramic ink
Borosilicate 3.3 glass for minimal expansion under varying temperatures
Optional amber coating for UV-sensitive reagents
Tolerance values comply strictly with Class A standards (e.g., ±0.02 mL for 10 mL flasks, ±0.30 mL for 1 L flasks).
How to Use a Volumetric Flask Correctly
Add solute to the flask.
Fill with solvent up to just below the mark.
Adjust precisely to the calibration line dropwise using a pipette.
Stopper and mix thoroughly by inverting several times.
For precise work, ensure the solution temperature is maintained at 20°C — the reference temperature for calibration.
Care, Cleaning, and Longevity
To preserve accuracy:
Rinse before use with the intended solvent.
Wash with mild detergent, gently brush if required.
Rinse 3–4 times with distilled water and air-dry inverted.
Store securely with its stopper in a clean, dry cabinet.
With proper care, borosilicate volumetric flasks are designed for long-term laboratory service. Osmosis Scientific is not liable for calibration deviations caused by improper cleaning, physical damage, or wear after delivery.
Calibration and Certification
Each flask is calibrated in compliance with ISO/IEC 17025 guidelines and may be supplied with a traceable calibration certificate. Batch-certified and individually certified options are available, with electronic versions compatible with LIMS systems for digital recordkeeping. Flasks can also include NABL-accredited calibration certificates upon request.
(Note: For outsourced certified products, certification validity, calibration accuracy, and traceability remain the sole responsibility of the original manufacturer or issuing certification body.)
Features at a Glance
Single precise calibration mark (meniscus line)
High chemical and thermal resistance
Available in clear or amber glass
Class A and Class B certification options
Supplied with glass stopper or snap cap
Optional QR/Barcode traceability
Long service life with low maintenance
Why Choose Our Volumetric Flasks?
Our volumetric flasks deliver superior performance through:
Borosilicate 3.3 glass construction to resist chemical attack and heat shock
Individually verified accuracy, supporting dependable results every time
Laser-etched printing that withstands repeated washing and sterilization
Custom calibration and branding options available for institutional or industrial orders
Every flask undergoes stringent quality inspection, designed to ensure only measurement-correct, defect-free products reach your lab.
Compatible Instruments Our volumetric flasks are compatible with magnetic stirrers, incubator shakers, and automated titration systems for complete workflow efficiency. Ideal for use in validated analytical setups in pharmaceutical, R&D, and food testing environments.
Frequently Asked Questions
What is the calibration line on a volumetric flask?
The calibration line on a volumetric flask indicates the exact volume the flask is designed to contain when the liquid level is adjusted precisely to that mark at the specified reference temperature, supporting accurate and repeatable volumetric measurements in analytical procedures.
Why is Borosilicate 3.3 glass used for volumetric flasks?
Borosilicate 3.3 glass is used for volumetric flasks because it offers excellent chemical resistance to most laboratory reagents, very low thermal expansion for stable calibrated volume, and high mechanical durability, making it ideal for precision volumetric glassware used in routine and advanced laboratory analysis.
What sizes of volumetric flasks are available?
Volumetric flasks are available in a wide range of capacities, with standard volumes typically including 5 ml, 10 ml, 25 ml, 50 ml, 100 ml, 250 ml, 500 ml, 1000 ml, and 2000 ml, while additional specialized sizes can be supplied to meet specific laboratory methods and capacity requirements.
Can volumetric flasks be heated?
Volumetric flasks are designed primarily for accurate volume measurement and should not be subjected to direct heating or extreme thermal shock, as exposure to high temperatures can permanently alter the calibrated volume and compromise measurement accuracy; Osmosis Scientific shall not be held liable for calibration deviations arising from improper thermal use of volumetric flasks.