Amber Glass Volumetric Flasks With PE Stopper Class-B
Product Code : EL-VF-10279
Lab Glassware Manufacturer produces the Amber Glass Volumetric Flasks With PE Stopper Class-B at its manufacturing facility in Ambala, Haryana, supplying school, college and research laboratories across India and exporting to institutional and distributor buyers in Kenya, Uganda and Rwanda and other markets across East Africa.
Quick answer: This is an amber (light-protective) borosilicate glass volumetric flask sealed with a polyethylene (PE) stopper, made to Class-B tolerance. The amber glass shields light-sensitive reagents and standard solutions from UV/visible degradation during storage, while the PE stopper gives a low-cost, chemically resistant seal for routine work. It is available across 13 capacity/neck-size combinations from 5 ml to 2000 ml.
| Capacity (ml) | Neck Size (N/S) | Tolerance (± ml) |
|---|---|---|
| 5 | 10/19 | 0.080 |
| 10 | 10/19 | 0.080 |
| 20 | 10/19 | 0.080 |
| 25 | 10/19 | 0.080 |
| 50 | 12/21 | 0.120 |
| 50 | 14/23 | 0.200 |
| 100 | 12/21 | 0.200 |
| 100 | 14/23 | 0.200 |
| 200 | 14/23 | 0.300 |
| 250 | 14/23 | 0.300 |
| 500 | 19/26 | 0.500 |
| 1000 | 24/29 | 0.800 |
| 2000 | 29/32 | 1.200 |
Why Choose Amber Glass With Class-B Tolerance
Amber glass is specified whenever the solution being prepared or stored is light-sensitive — iodine and silver nitrate standards, certain vitamin assays and various organic reagents will slowly degrade under normal lab lighting or daylight in clear glass, and amber glass filters out the UV and part of the visible spectrum responsible for that breakdown. Pairing that with a PE stopper keeps the flask economical for routine, non-certified use: PE resists most common laboratory chemicals and will not seize on the neck the way a dry ground-glass joint can. Class-B tolerance is the standard accuracy band for this combination — a teaching lab or general QC bench gets full amber light protection without paying for Class-A/serialized certification it does not need. Every value in this Class-B tolerance column runs exactly double the equivalent Class-A tolerance in this range, a consistent 2× relationship confirmed capacity-by-capacity against the amber Class-A PE-stopper flask in this catalogue.
Frequently Asked Questions
Why is this volumetric flask made of amber glass instead of clear glass?
Amber glass blocks UV and part of the visible light spectrum that would otherwise gradually degrade light-sensitive reagents, standard solutions and certain organic compounds stored or prepared in the flask, extending their usable shelf life compared with storage in clear glass.
How much wider is the Class-B tolerance compared with the Class-A version of this flask?
Checked capacity-by-capacity against the amber, PE-stopper Class-A flask in this range, every Class-B tolerance value here is exactly double the corresponding Class-A figure — for example 0.080ml versus 0.040ml at 5-25ml, and 1.200ml versus 0.600ml at 2000ml.
Is the PE stopper resistant to common laboratory chemicals?
Polyethylene resists most acids, alkalis and common aqueous reagents used in routine titration and dilution work, and will not seize on the neck the way a dry ground-glass stopper occasionally can. For aggressive organic solvents, a PTFE or ground-glass stopper option should be requested instead.
Can this flask be supplied for bulk, tender or export orders?
Yes. It is supplied in bulk to schools, colleges and laboratories in India and is exported to distributor and institutional buyers, including recent enquiries from East African markets such as Kenya, Uganda and Rwanda. Share capacity, quantity and destination country through Contact Us or the Tenders page for a quotation.
Related Products
Explore other Volumetric Flasks: Amber Volumetric Flask, With PE Stopper Class-A and Volumetric Flasks Clear Glass With Hollow Glass Stopper Class-B, or see the full Volumetric Flasks range.
Request a Quote
Ready to order Amber Glass Volumetric Flasks With PE Stopper Class-B for your laboratory, institution or export order? Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.