Conical flask with a narrow throat

Conical Flask with Narrow Throat

Narrow throat Flasks/conical-flask-with-thread-and-polypropylene-cap">conical flasks give you better control over your work than standard wide-mouth designs. The restricted opening cuts down on evaporation losses and keeps contaminants out while you're heating or mixing. Built from borosilicate glass, these flasks handle thermal shock without cracking.

Narrow Throat Engineering for Controlled Pouring

The constricted neck does more than just look different. It creates a controlled pour stream that matters when you're transferring reagents or decanting supernatant. Splash-back stays minimal compared to beakers or Laboratory glasses and beakers with open tops. You can swirl contents aggressively without losing material through the opening.

Precision Neck Dimensions and Flow Control

• Opening diameter typically 20-35mm depending on flask volume
• Neck length provides 40-80mm of vertical clearance
• Accepts standard rubber stoppers and cork sizes
• Compatible with Condensers and Straight tube condenser setups for reflux work
• Reinforced rim prevents chipping during stopper insertion

Reduced Evaporation Benefits

The narrow opening cuts evaporation rates by 60-75% compared to open beakers during heating operations. Matters when you're working with volatile solvents or running extended reactions. For even better vapor control, pair with a Conical flask with grind that accepts ground glass stoppers, or use a Conical flask with thread and polypropylene cap for room temperature storage between procedures.

Optimal Uses in Titration Work

• Titration endpoint detection: Narrow neck concentrates indicator color changes in visible zone
• Magnetic stirring: Conical shape creates efficient vortex with stir bars
• Culture growth: Restricted opening allows gas exchange while blocking airborne contamination
• Heating applications: Place directly on hot plates up to 500°C

Available in volumes from 25ml to 2000ml with ±5% accuracy markings. Temperature range spans -70°C to +500°C. Each flask meets ISO 4797 standards for laboratory glassware.