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Pear Shaped Flask with Two Neck
Pear Shaped Flask with Two Neck (Product Code: SLE/GFL/12) is a small borosilicate reaction flask with a 14/23 centre joint and a second neck set at 25° to the side. The centre neck typically carries a condenser while the angled side neck takes a thermometer, an addition funnel or a gas inlet, which makes the flask practical for microscale synthesis and small reflux or distillation runs in college and research chemistry labs. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala.
Specifications
| Parameter | Detail |
|---|---|
| Material | Borosilicate glass |
| Design | Pear shaped body with centre neck and one side neck |
| Side neck angle | 25° |
| 50 mL size | Centre joint 14/23; overall height 100 mm |
| 100 mL size | Centre joint 14/23; overall height 100 mm |
| Side socket size | Not stated in the current listing — confirmed on enquiry |
| Resistance | Heat resistant and chemical resistant |
| Used in | Chemical laboratories |
Typical Use
A common arrangement is to fit a reflux condenser to the 14/23 centre neck and use the side neck to monitor the reaction temperature or to add a reagent drop by drop while the mixture boils gently. Because the side neck leans out at 25°, the thermometer or funnel stays clear of the condenser and clamps above it. Pear-shaped flasks are generally preferred for small charges, as the tapered base keeps a few millilitres of liquid together instead of spreading it thinly over a wide bottom.
Pick the 50 mL flask for microscale student preparations and the 100 mL flask when a little more working volume is needed. Heat in a water or oil bath rather than over a direct flame, support the flask by the centre neck, and make sure the apparatus is always open to the air through the condenser — never heat a sealed system.
Manufacturer
Jain Scientific Equipments Private Limited makes this two-neck flask and markets it under the ScienceLab name. The company is located in Ambala, Haryana, and its glassware reaches teaching and research laboratories in India and international markets. See the company profile for more about us.
Related Laboratory Equipment
Glassware and fittings that complete a small-scale reaction or distillation set-up:
- Pear Shaped Flask — the single-neck version for simple small-volume distillation
- Round Bottom Flask With Two Neck — a two-neck option for larger batches
- Liebig Condenser — condenser for reflux or distillation (check the joint matches 14/23)
- Universal Clamp — holds the small flask firmly by its centre neck
- Water Bath Kit for Hotplates — gentle bath heating for the pear-shaped base
Other single, two-neck and wide-neck designs are listed in Glassware Flasks.
Frequently Asked Questions
What joint sizes do the two necks have?
The centre neck is 14/23. The side socket size is not given in our current listing, so please contact us and we will confirm it before you order.
Why is the side neck angled?
Setting it at 25° spreads the two openings apart, so a thermometer, dropping funnel or gas inlet can be fitted without clashing with the condenser on the centre neck.
Which capacities are available?
50 mL and 100 mL. Both are listed with a 100 mm overall height and a 14/23 centre joint.
Will it fit my existing ground-glass apparatus?
It connects directly to any fitting with a 14/23 cone on the centre neck. For larger joints, a suitable reduction adapter is needed.
Is there a warranty?
Warranty terms are confirmed at the time of quotation — contact us for the current terms.
How do I order for a college laboratory?
Send the capacity, quantity, delivery location and any purchase or tender reference, and we will return a formal quotation.
Request a Quote
Please contact us for prices, or add this flask to your enquiry cart together with any condensers and clamps you need.
Last updated: 24 September 2026
