PYREX® Flasks Kjeldahl, with plain neck
- Manufactured from 3.3 expansion borosilicate glass complying with ISO 3585 (ASTM E-438 Type 1 Class A)
- Used for the determination of nitrogen by the Kjeldahl method
- Note: The Kjeldahl method subjects flasks to severe chemical and thermal abuse. See care and maintenance of laboratory glassware for advice on safety and usage.
Products

| Catalog No | Capacity (mL) | Bulb Diameter (mm) | Neck ID (mm) | Neck OD (mm) | Height (mm) | Quantity | |
|---|---|---|---|---|---|---|---|
| 1200/04M | 100 | 58 | 17 | 22 | 240 | 10 | Find a distributor |
| 1200/10D | 300 | 81 | 24 | 28 | 300 | 20 | Find a distributor |
| 1200/12D | 500 | 101 | 30 | 34 | 325 | 10 | Find a distributor |
| 1200/16M | 800 | 115 | 30 | 34 | 350 | 10 | Find a distributor |
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
The extra-long neck of the flask acts as an air condenser during the digestion stage and reduces entrainment during the distillation stage of the Kjeldahl process.
Products
Products

| Catalog No | Capacity (mL) | Bulb Diameter (mm) | Neck ID (mm) | Neck OD (mm) | Height (mm) | Quantity | |
|---|---|---|---|---|---|---|---|
| 1200/04M | 100 | 58 | 17 | 22 | 240 | 10 | Find a distributor |
| 1200/10D | 300 | 81 | 24 | 28 | 300 | 20 | Find a distributor |
| 1200/12D | 500 | 101 | 30 | 34 | 325 | 10 | Find a distributor |
| 1200/16M | 800 | 115 | 30 | 34 | 350 | 10 | Find a distributor |
Specification
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Product Overview
The extra-long neck of the flask acts as an air condenser during the digestion stage and reduces entrainment during the distillation stage of the Kjeldahl process.
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