Precision laboratory glassware with standardized ground joints is essential for creating airtight, leak-proof assemblies for distillation and synthesis. LabFriend provides an extensive collection of flasks with NS joint necks, located within the distillation and synthesis section of our distillation, separation, and filtration department. These professional flasks are manufactured from high-quality borosilicate glass to ensure thermal resistance and chemical purity.
Why Choose Professional NS Joint Neck Flasks?
Our curated collection of synthesis flasks is engineered for secure connections and high-temperature stability:
- Durable Erlenmeyer Flasks: We stock ISOLAB Erlenmeyer Flasks (50 mL to 1000 mL) made from Boro 3.3 glass, featuring white graduations and standardized NS 14/23 or NS 29/32 joints.
- Specialized Pear Shape Design: Utilize Lenz-Laborglas Pear Shape Flasks, available in small volumes (10 mL to 25 mL) with NS 14/23 joints, ideal for recovery distillation and concentrated reactions.
- High-Grade Borosilicate: Most flasks, including those from ISOLAB and Lenz, are crafted from Boro 3.3 or Duran glass, providing exceptional resistance to thermal shock and aggressive reagents.
- Vacuum-Tight Seals: The precision-ground NS joints allow for a grease-free or vacuum-sealed connection with other standardized glass components like condensers and adapters.
LabFriend supplies NS joint neck flasks from manufacturers trusted globally for glassware precision:
- ISOLAB: Offers a high-quality range of Erlenmeyer flasks with white graduations, designed for reliable everyday synthesis and storage.
- Lenz-Laborglas: Renowned German specialists providing pear-shaped and specialized flasks with high-precision ground joints.
- DWK Life Sciences: Features premium Duran glass flasks, the global industry standard for high-performance laboratory glassware.
- LLG Labware: Provides a cost-effective selection of reliable jointed flasks for routine laboratory applications.
- Kartell: Known for durable laboratory accessories, complementing the glassware range with robust synthesis supports.
The flask is the core of any synthesis rig; to complete your professional distillation or reaction assembly, we recommend exploring these related categories:
- Reaction & Distillation Components: Connect your NS flasks to ISOLAB vacuum adapters and Lenz delivery bends for a full setup.
- Dropping Funnels: Use Lenz-Laborglas cylindrical funnels to add reagents drop-wise into your Erlenmeyer flasks.
- Extraction Components: Process your distilled products using Lenz separating funnels and ISOLAB funnel holders.
- Distillation Accessories: Ensure smooth boiling within your jointed flasks using J.P. Pöllath boiling stones.
Unsure if an NS 14/23 or NS 29/32 neck is the right fit for your existing condenser? Our team provides local technical support to help you find the perfect flask solution with fast shipping and competitive pricing.
Frequently Asked Questions
1. What is the difference between an Erlenmeyer and a Pear Shape flask?
Erlenmeyer flasks are general-purpose for mixing and heating, while Pear Shape flasks (like those from Lenz) are specifically designed for evaporating small volumes to dryness or for recovery in distillation.
2. What does "NS 29/32" stand for?
NS refers to "Normal-Schliff" (standard ground joint). 29 is the diameter (mm) at the widest point, and 32 is the length (mm) of the joint, ensuring a standardized fit between different brands.
3. Why is Boro 3.3 glass used for these flasks?
Boro 3.3 (borosilicate) glass is used because it has a very low coefficient of thermal expansion, meaning it can withstand rapid temperature changes without cracking.
4. Can these flasks be used under vacuum?
Yes, flasks with precision NS joints from brands like ISOLAB and Lenz are designed to maintain a tight seal, making them suitable for vacuum distillation and reduced-pressure reactions.
