Kjeldahl Flask without Joint
Product Code : LSK-LF-10425
Kjeldahl Flask without Joint (SKU LSK-LF-10425) is a long-necked borosilicate glass flask with a plain neck, used for the determination of nitrogen by the Kjeldahl method. It is listed in 100, 300, 500 and 800 mL capacities. Agricultural, food, pharmacy and chemistry labs use it for sample digestion. Science Lab Supplies can quote and dispatch this flask from Ambala, India to colleges, testing laboratories, tender contractors and distributors.
Specifications
Made of borosilicate glass, the flask has no ground joint at the neck, so it suits digestion racks and set-ups that do not need a jointed connection. Diameter grows from 60 mm to 117 mm and height from 200 mm to 340 mm across the four capacities.
| Parameter | Value |
|---|---|
| SKU | LSK-LF-10425 |
| Glass | Borosilicate |
| Neck | Without joint |
| 100 mL | Diameter 60 mm; height 200 mm |
| 300 mL | Diameter 85 mm; height 295 mm |
| 500 mL | Diameter 101 mm; height 300 mm |
| 800 mL | Diameter 117 mm; height 340 mm |
| Purpose | Determination of nitrogen |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Kjeldahl Flask
In the Kjeldahl method a sample is digested in the flask with hot concentrated sulphuric acid, converting its nitrogen to ammonium salts that are later distilled and titrated. The long neck holds back splashes and acid fumes during digestion, which makes this borosilicate laboratory glassware in India a standard analytical vessel.
- B.Sc. agriculture and soil science: estimating total nitrogen in soil and plant samples.
- Food technology and dairy labs: protein estimation from Kjeldahl nitrogen.
- B.Pharm. and analytical chemistry practicals: nitrogen content of organic compounds.
Digestion uses hot concentrated acid: work in a fume hood, wear eye and hand protection, and carry out the procedure under supervision.
Standard Scope of Supply
The Kjeldahl Flask without Joint is supplied as a single flask in the capacity you order, as described above. Digestion heaters, distillation units and reagents are separate; any glassware needed alongside can be added to the quotation.
Packing, MOQ and Lead Time
Testing labs often need a full rack of flasks, while colleges may want a few for a demonstration; either way the quotation lists packing, delivery time and price for the quantity requested. As a laboratory glassware supplier in India, Science Lab Supplies can also add the jointed Kjeldahl Flask to the same order.
With an Importer-Exporter Code as a registered exporter, Science Lab Supplies is able to ship to buyers in Peru, Egypt, Iraq, Nigeria, Kenya and Ghana. Send your requirement from the contact page, add the flask to the enquiry cart, or review the lab tender page for tender purchases.
Frequently Asked Questions
What is a Kjeldahl flask used for?
It is used for the determination of nitrogen: the sample is digested in the flask with concentrated acid before the nitrogen is distilled off as ammonia and titrated.
What does without joint mean?
The neck is plain, with no ground-glass joint. Choose this version for digestion set-ups that do not connect to jointed glassware; the Kjeldahl Flask listing covers jointed necks.
Which capacities are available?
Four capacities are listed: 100, 300, 500 and 800 mL, with heights from 200 mm to 340 mm.
Who supplies this Kjeldahl flask?
Science Lab Supplies supplies it from Ambala, India, and quotes single flasks as well as lab and tender quantities.
Related Laboratory Flasks
These flasks from the same range cover the jointed Kjeldahl version and the distillation and titration steps that follow digestion, so a nitrogen-analysis bench can be equipped and quoted in one go.
- Kjeldahl Flask — version with a ground-joint socket.
- Round Bottom Flask, Narrow Neck — for distillation set-ups.
- Distillation Flask — side-arm flask for simple distillation.
- Conical Flask — for collecting and titrating the distillate.
Browse the full laboratory flasks range or all school lab equipment.
Last updated: 25 September 2026
