Name: Volumetric Flask
Brand: RichTech

Specifications

Volumetric Flask · Specifications

Standard capacity ranges below, compliant with ISO 1042, Class A accuracy. Custom capacities and special specifications available upon request.

Request custom specs

1. Plain Neck Volumetric Flasks

Capacity (mL)	Accuracy (±mL)	O.D. (mm)	Height (mm)	Glass Material
5	0.025	22	70	Borosilicate 3.3 (clear / amber)
10	0.025	27	90	Borosilicate 3.3 (clear / amber)
25	0.040	40	110	Borosilicate 3.3 (clear / amber)
50	0.060	50	140	Borosilicate 3.3 (clear / amber)
100	0.100	60	170	Borosilicate 3.3 (clear / amber)
200	0.150	75	210	Borosilicate 3.3 (clear / amber)
250	0.150	80	220	Borosilicate 3.3 (clear / amber)
500	0.250	100	260	Borosilicate 3.3 (clear / amber)
1000	0.400	125	300	Borosilicate 3.3 (clear / amber)
2000	0.600	160	370	Borosilicate 3.3 (clear / amber)
5000	1.200	217	470	Borosilicate 3.3 (clear / amber)

2. SJ Neck Volumetric Flasks (Glass Stopper)

Capacity (mL)	Accuracy (±mL)	O.D. (mm)	Height (mm)	Joint Size	Glass Material
5	0.025	22	70	7/16	Borosilicate 3.3 (clear / amber)
10	0.025	27	90	7/16	Borosilicate 3.3 (clear / amber)
25	0.040	40	110	10/19	Borosilicate 3.3 (clear / amber)
50	0.060	50	140	12/21	Borosilicate 3.3 (clear / amber)
100	0.100	60	170	12/21	Borosilicate 3.3 (clear / amber)
200	0.150	75	210	14/23	Borosilicate 3.3 (clear / amber)
250	0.150	80	220	14/23	Borosilicate 3.3 (clear / amber)
500	0.250	100	260	19/26	Borosilicate 3.3 (clear / amber)
1000	0.400	125	300	24/29	Borosilicate 3.3 (clear / amber)
2000	0.600	160	370	29/32	Borosilicate 3.3 (clear / amber)
5000	1.200	217	470	34/35	Borosilicate 3.3 (clear / amber)

3. SJ Neck Volumetric Flasks (Plastic Stopper)

Plastic stoppers are manufactured from high-quality PP material, chemically resistant and suitable for routine laboratory use.

Capacity (mL)	Accuracy (±mL)	O.D. (mm)	Height (mm)	Joint Size	Glass Material
5	0.025	22	70	7/16	Borosilicate 3.3 (clear / amber)
10	0.025	27	90	7/16	Borosilicate 3.3 (clear / amber)
25	0.040	40	110	10/19	Borosilicate 3.3 (clear / amber)
50	0.060	50	140	12/21	Borosilicate 3.3 (clear / amber)
100	0.100	60	170	12/21	Borosilicate 3.3 (clear / amber)
200	0.150	75	210	14/23	Borosilicate 3.3 (clear / amber)
250	0.150	80	220	14/23	Borosilicate 3.3 (clear / amber)
500	0.250	100	260	19/26	Borosilicate 3.3 (clear / amber)
1000	0.400	125	300	24/29	Borosilicate 3.3 (clear / amber)

* Custom capacities and special specifications available upon request.
* Plain neck flasks are designed for routine volumetric operations without sealing.
* SJ neck flasks feature standard ground joint stoppers for excellent sealing performance.
* Amber volumetric flasks are light-protective, suitable for light-sensitive solutions.
* All volumetric flasks comply with ISO 1042 standards, Class A accuracy.

Product Description

The volumetric flask is an essential instrument for precise standard solution preparation and volumetric analysis in the laboratory, featuring a narrow neck and a single ring graduation mark for accurate volume measurement. Manufactured from high-quality borosilicate glass 3.3 and compliant with ISO 1042 standards.

Clear & Amber · Two Glass Options

RichTech volumetric flasks are available in clear glass and amber glass:

Clear Volumetric Flasks: Classic transparent design for easy observation of liquid levels and color changes. Suitable for routine standard solution preparation.
Amber Volumetric Flasks: Amber glass body effectively blocks UV light (wavelength ≤ 470nm), preventing light-sensitive solutions from decomposing due to light exposure. Particularly suitable for silver nitrate, iodine, and potassium permanganate standard solutions.

Plain & SJ · Two Neck Options

RichTech volumetric flasks are available with plain and standard ground joint (SJ) necks:

Plain Neck Volumetric Flasks: Smooth neck opening, ideal for routine volumetric operations without sealing requirements. Cost-effective and easy to use.
SJ Neck Volumetric Flasks: Feature standard ground joint stoppers (glass or PTFE) for excellent sealing performance. Ideal for long-term storage of standard solutions, preventing evaporation and contamination. Interchangeable stoppers for convenient laboratory use.

Design Features

Narrow Neck: Enables precise meniscus control to the ring graduation mark, minimizing volumetric errors.
Ring Graduation Mark: A single ring mark indicates the nominal capacity for clear, accurate reading.
Flat Bottom: Provides stable placement on workbenches (not for direct heating).
Uniform Wall Thickness: Even thickness for strength and durability.

Material Advantage

Manufactured from Borosilicate Glass 3.3 in accordance with ISO 3585 standards. The ultra-low coefficient of thermal expansion (3.3×10⁻⁶/K) ensures resistance to thermal shock and excellent chemical durability.

Quality Assurance

Every volumetric flask undergoes rigorous dimensional inspection, accuracy verification, and visual inspection to meet ISO 1042 Class A requirements.

Note: Volumetric flasks are precision instruments for standard solution preparation. Confirm the nominal volume before use. Maintain the solution temperature near 20°C to avoid volume errors. Store amber flasks away from direct light to maintain their light-blocking properties.

Applications

Common Configurations

Volumetric Flask + Pipette Precise dilution and preparation of standard solutions
Volumetric Flask + Beaker Solution preparation and transfer
Volumetric Flask + Stopper Long-term sealed storage of standard solutions

Specific Applications

Standard Solution Preparation

Precise preparation of standard solutions at various concentrations

Sample Volumetric Adjustment

Precise final volume adjustment after sample preparation

Volumetric Analysis

Standard solution preparation for titration analysis

Dilution Operations

Precise dilution of samples to target concentrations

Light-Sensitive Solution Storage

Amber flasks for silver nitrate, iodine, and potassium permanganate solutions

Teaching Labs

Analytical chemistry education

Pharmaceutical QC

Standard solution preparation for API content determination

Environmental Monitoring

Standard solution preparation for water analysis

Tip: Volumetric flasks are essential for standard solution preparation. Clear flasks are suitable for routine solutions, while amber flasks are ideal for light-sensitive solutions. SJ neck flasks with ground stoppers provide excellent sealing for long-term storage; plain neck flasks are ideal for prepare-and-use operations.

Volumetric Flask Procedure

03

Preparation

Inspect the volumetric flask for cracks, scratches, or other defects.
Ensure the flask is clean and dry before use.
Select the appropriate flask for the required volume.
For SJ neck flasks, check that the stopper fits properly and seals well.

04

Volumetric Adjustment

Transfer the pre-dissolved sample or solution to the volumetric flask. Rinse the original container with solvent and transfer the rinsings to the flask.
Add solvent to approximately 2/3 of the flask capacity and swirl to mix the solution thoroughly.
Continue adding solvent until the level approaches the neck graduation mark, then add dropwise using a dropper until the bottom of the meniscus is tangent to the ring graduation mark.
Read the volume with your eye level with the lowest point of the meniscus.
Stopper the flask (use an appropriate stopper for plain neck flasks) and invert repeatedly to ensure complete mixing.

05

Sealing & Storage

SJ neck flasks with standard ground joint stoppers provide excellent sealing for long-term storage of standard solutions.
For plain neck flasks requiring sealing, use rubber or plastic stoppers that match the neck diameter.
Store amber flasks away from direct light to maintain their light-blocking properties.
Label the flask with solution name, concentration, and preparation date.

06

Cleaning & Maintenance

Clean immediately after use to prevent residue from drying.
Clear flasks can be cleaned with standard laboratory detergents.
Amber flasks are cleaned in the same manner as clear flasks — the light-blocking property is unaffected.
For SJ neck flasks, handle the ground joint carefully to avoid chipping.
Use dilute acid or specialized cleaning agents for stubborn residues.
Rinse with distilled water and air-dry upside down on a drying rack.
Store carefully to avoid chipping and breakage.

Tip: Volumetric flasks are essential for standard solution preparation. Control temperature and parallax carefully when reading the meniscus. SJ neck flasks with ground stoppers provide excellent sealing for long-term storage; plain neck flasks are cost-effective for prepare-and-use operations. Amber flasks are suitable for light-sensitive solutions, preventing decomposition due to light exposure.

Care & Notes

Show care & notes

Safety Notes

Maintain the final solution temperature near 20°C — temperature variation causes volume errors.
Inspect flasks for cracks or scratches before use — damaged glass may break during use.
Store amber flasks away from direct light to maintain their protective properties.

Do not

For SJ neck flasks, do not interchange stoppers between flasks — use matched stoppers for proper sealing.
Handle and store with care, avoiding impact with hard surfaces.