Description
The Class A Volumetric Flask With Hollow Glass Stopper from Osmosis Scientific is precision glassware engineered to deliver the highest level of volumetric accuracy and repeatability for laboratory workflows. Manufactured from high-grade Boro 3.3 borosilicate glass, this flask offers best-in-class resistance to thermal and chemical stress — perfect for research, analytical, pharmaceutical, and quality control environments.
Each flask is calibrated to Class A standards, ensuring exceptional accuracy, traceability, and minimal tolerance variation — a necessity when preparing standard solutions, performing volumetric titrations, or conducting quantitative analysis. The narrow neck and etched calibration line provide a precise reference for exact solution volume, while the included hollow glass stopper offers a secure, contaminant-resistant seal.
This flask is supplied with a batch calibration certificate, which documents measured accuracy and quality, making it suitable for regulated environments and documented laboratory procedures.
Available in a complete range of sizes from 10 ml to 2000 ml, this volumetric flask supports both micro-scale analytical tasks and larger preparation requirements. Its clear glass body allows excellent visibility of the solutions being prepared, and the stable flat base ensures secure bench placement during daily use.
| Capacity (mL) | N/S | Tolerance (± mL) | Pack of | SKU | Enquiry |
|---|---|---|---|---|---|
| 5 | 10/19 | 0.040 | 1 | VF-HGS-0005-1019 | Enquire Now |
| 10 | 10/19 | 0.040 | 1 | VF-HGS-0010-1019 | Enquire Now |
| 20 | 10/19 | 0.040 | 1 | VF-HGS-0020-1019 | Enquire Now |
| 25 | 10/19 | 0.040 | 1 | VF-HGS-0025-1019 | Enquire Now |
| 50 | 12/21 | 0.060 | 1 | VF-HGS-0050-1221 | Enquire Now |
| 50 | 14/23 | 0.100 | 1 | VF-HGS-0050-1423 | Enquire Now |
| 100 | 12/21 | 0.100 | 1 | VF-HGS-0100-1221 | Enquire Now |
| 100 | 14/23 | 0.100 | 1 | VF-HGS-0100-1423 | Enquire Now |
| 200 | 14/23 | 0.150 | 1 | VF-HGS-0200-1423 | Enquire Now |
| 250 | 14/23 | 0.150 | 1 | VF-HGS-0250-1423 | Enquire Now |
| 500 | 19/26 | 0.250 | 1 | VF-HGS-0500-1926 | Enquire Now |
| 1000 | 24/29 | 0.400 | 1 | VF-HGS-1000-2429 | Enquire Now |
| 2000 | 29/32 | 0.600 | 1 | VF-HGS-2000-2932 | Enquire Now |
| 5000 | 34/35 | 1.200 | 1 | VF-HGS-5000-3435 | Enquire Now |
Frequently Asked Questions (FAQs)
A volumetric flask is used for the accurate measurement and preparation of liquid solutions at a specific volume. It is commonly used in analytical chemistry, research laboratories, and educational institutions.
Class A volumetric flasks offer higher accuracy and tighter tolerances than Class B flasks. They are preferred for quantitative analysis and precise laboratory work.
Hollow glass stoppers are chemically inert, offer low permeability and match the flask glass, reducing contamination risk and evaporation for long‑term storage of aggressive or high‑purity reagents.
Standard capacities range from 5 mL up to 5000 mL with appropriate NS joint sizes, covering micro‑scale, routine analytical and bulk standard solution preparation needs.
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