Description

Catalog No.	Capacity ml	Body Dia.	Neck Dia.	Height mm
11005/1.1	25	–	–	–
11005/1	50	51	26	90
11005/2	100	64	26	110
11005/2.1	150	74	28	118
11005/3	250	85	34	143
11005/4	500	105	34	168
11005/5	1000	131	42	200
11005/6	2000	166	50	240
11005/7	3000	185	50	260
11005/8	5000	223	50	305
11005/9	10000	279	65	380
11005/10	20000	350	75	510

The MEDILAB Round Bottom Narrow Neck Flask is a precision-crafted laboratory vessel designed for heating, boiling, distillation, and chemical reaction processes. Its spherical body ensures uniform heat distribution, while the narrow neck supports secure sealing, controlled evaporation, and safe handling. An essential tool for chemistry, pharmaceuticals, biotech, and research labs, this flask provides dependable performance under demanding laboratory and industrial conditions.

Key Features

• Uniform Heating Performance: Round-bottom design ensures even thermal distribution, minimising hot spots during heating and reflux operations.
• High Chemical Resistance: Suitable for acids, solvents, alkalis, and organic reagents without leaching or degradation.
• Heat Shock Resistant: Withstands rapid temperature changes, making it ideal for heating, cooling, and autoclaving.
• Narrow Neck Design: Allows secure fitting of stoppers, condensers, and adapters for distillation and synthesis setups.
• Precision Manufacturing: Produced with consistent wall thickness for accuracy, strength, and long operational life.
• Leak-Proof Fit: Compatible with standardised joints and rubber stoppers for safe experimental setups.
• Durable Laboratory Construction: Scratch-resistant, easy to clean, and designed for repeated heating cycles.

Material Specifications

• Material: High-grade Borosilicate Glass 3.3
• Thermal Properties:
  Low thermal expansion coefficient (~3.3 × 10⁻⁶/K)
  Withstands temperatures up to 400°C (continuous use)
  High thermal shock resistance as per ISO 3585
• Chemical Resistance: Excellent resistance to corrosive chemicals, solvents, and biological reagents
• Mechanical Strength: Robust construction with high impact tolerance
• Compliance: Manufactured according to relevant ISO, DIN, and ASTM glassware standards for laboratory use

Technical Specifications

• Available Capacities: 25 ml to 2000 ml (as per the standard size table)
• Dimensions: Diameter, height, and neck size vary according to capacity. Standard tolerances apply as per international laboratory glassware norms.
• Accuracy / Tolerance: All flasks are produced with controlled wall thickness and dimensional accuracy suitable for heating and reaction work.
• Joint/Neck Options:
   Narrow neck with plain mouth
  Optional ground joint (on request)
• Packaging:
  Individually packed with protective cushioning, bulk-pack/carton options are available for export shipments.
• Accessories (Optional):
   Rubber stoppers
   Glass stoppers
  Condensers and adapters compatible with the narrow neck
   Stands, clamps, and heating mantles

Handling & Precautions

• Safe Use: Always support the flask using clamps or heating mantles during heating procedures.
• Heating: Do not expose directly to an open flame unless supported with a proper setup. Recommended for use with heating mantles, oil baths, or sand baths.
• Autoclaving: Fully autoclavable at standard sterilisation temperatures.
• Cleaning: Use non-abrasive detergents; avoid sudden temperature shifts during washing to prevent thermal stress.
• Do’s:
   Inspect for chips or cracks before use
   Preheat gradually
   Store in padded stands or racks
• Don’ts:
  Do not subject to mechanical shock
  Do not heat an empty flask
  Do not use incompatible stoppers or oversized clamps

Applications

• Chemical synthesis, reaction setups, and sample preparation
• Heating, boiling, evaporation, and reflux operations
• Distillation and fractionation processes
• Pharmaceutical formulation, QC/QA testing, and R&D
• Biotech and microbiology sample processing
• Academic laboratory experiments and industrial research workflows
• Suitable for organic chemistry, analytical chemistry, and general lab use

The Round Bottom Narrow Neck Flask plays a critical role in routine laboratory work where controlled heating and uniform thermal distribution are essential.

Why Choose MEDILAB

• 35+ Years of Expertise in Scientific Glassware Manufacturing
• Exporting to 40+ Countries, trusted by global distributors and laboratories
• Premium Export Quality with strict QC at every production stage
• OEM / Private Labelling Support for distributors and brands worldwide
• Reliable and Consistent Performance across all product batches
• Strong Packaging & Global Supply Capability, ensuring safe and timely delivery
• Competitive Pricing & Custom Options for large-volume B2B orders