Glassco Flat Bottom Flask with NS Ground Glass Joint
The Glassco flat bottom flask with NS ground glass joint is a versatile borosilicate 3.3 glass flask manufactured to DIN/ISO 4797 and USP standards. The flat base allows stable freestanding use on laboratory bench surfaces without the need for a support stand or ring — making flat bottom flasks a practical choice for general heating, solution preparation, and reaction applications where a stable, self-supporting vessel is preferred over a round bottom flask.
The NS 29/32 ground glass neck joint provides compatibility with standard laboratory fittings, condensers, and adaptors. Available in capacities from 50mL to 2000mL, supplied from Glassco’s European warehouse in the Netherlands for fast delivery across Ireland.
Key Features
Flat Base — Stable Freestanding Use
The flat bottom design provides inherent stability on bench surfaces without requiring a clamp stand or support ring — simplifying laboratory setups and reducing equipment requirements for routine heating, mixing, and solution preparation tasks.
NS 29/32 Ground Glass Joint
The NS 29/32 standard taper ground glass joint provides compatibility with standard condensers, adaptors, and distillation fittings — enabling use across a wide range of laboratory assembly configurations.
DIN/ISO 4797 and USP Compliant
Manufactured in compliance with DIN/ISO 4797 and USP standards, ensuring consistent dimensional accuracy and material quality.
Borosilicate 3.3 Glass
Excellent chemical and thermal resistance for heating, reflux, and general chemical laboratory applications.
White Printing
Durable white capacity markings for clear identification during laboratory use.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Glassco |
| Type | Flat Bottom Flask with NS Joint |
| Glass Type | Borosilicate 3.3 |
| Standard Compliance | DIN/ISO 4797, USP |
| NS Joint Size | NS 29/32 |
| Printing | White |
| Available Capacities | 50mL, 100mL, 250mL, 500mL, 1000mL, 2000mL |
| Supply Origin | Glassco European Warehouse, Netherlands |
Capacity, Dimensions and Stock Reference
| Capacity | NS Joint | OD × H (mm) | Item Code |
|---|---|---|---|
| 50mL | NS 29/32 | 51 × 100 | EU058.202.02A |
| 100mL | NS 29/32 | 64 × 110 | EU058.202.05 |
| 250mL | NS 29/32 | 85 × 140 | EU058.202.13 |
| 500mL | NS 29/32 | 105 × 170 | EU058.202.17 |
| 1000mL | NS 29/32 | 131 × 200 | EU058.202.20 |
| 2000mL | NS 29/32 | — | EU058.202.23 |
Applications
- General solution preparation — stable freestanding heating and mixing on laboratory bench or hotplate
- Reflux assemblies — connection to condensers via NS 29/32 joint for reflux and heating under reflux
- Chemical reactions — stable reaction vessel for laboratory-scale synthesis and preparative chemistry
- Storage of reagents — stable flat base for temporary reagent storage during laboratory procedures
Availability in Ireland
Available from Varen Scientific — Ireland’s authorised distributor for Glassco laboratory glassware, supplied from the European warehouse in the Netherlands. To request a quote, use the Request a Quote button above or contact our team directly. For further information on borosilicate glass standards refer to ISO laboratory glassware guidance.
