The Borosil Stirrer Rod (Series 9850) is a fundamental yet precision-engineered laboratory tool designed for efficient mixing and stirring of liquid samples. Crafted from high-quality polished 3.3 borosilicate glass, these rods are exceptionally durable and resistant to thermal shock. Unlike standard glass rods, the Borosil 9850 series is specifically treated to offer a smooth, polished finish that minimizes sample adhesion and prevents contamination. Whether used in high-heat applications or with corrosive chemical agents, these stirrers maintain their structural integrity, making them the gold standard for daily analytical and research work.
Available in various lengths and diameters—ranging from 150mm to 305mm—the Borosil 9850 Stirrer caters to a wide array of laboratory glassware, from small beakers to large volumetric flasks. Its Type 1, Class A borosilicate composition ensures it can withstand rapid temperature changes without cracking. These rods are essential for dissolving powders, creating homogeneous mixtures, and assisting in decanting processes. For laboratories that prioritize precision, durability, and safety, the Borosil 9850 series provides a reliable, cost-effective solution that exceeds the performance of ordinary soda-lime glass alternatives.
Technical Specifications
MaterialPolished 3.3 Borosilicate Glass
Length Range150 mm to 305 mm
Diameter (OD)7 mm or 9 mm Options
Heat ResistanceHigh Thermal Shock Resistance
Glass GradeType 1, Class A
Chemical ResistanceExcellent (Acid & Alkali Resistant)
FinishFully Polished Ends
ApplicationManual Stirring & Decanting
Common Uses
The 9850 series is widely used for mixing reagents in chemical synthesis, preparing buffers in biochemistry, and homogenizing samples in microbiology. It is particularly useful for manual titrations, dissolving salts in aqueous solutions, and preventing the settling of precipitates. The polished ends are also ideal for assisting in the smooth transfer (decanting) of liquids from one container to another without spilling.
Expert FAQ
1. Why choose borosilicate glass over regular glass for stirring?
Borosilicate 3.3 has a much lower coefficient of thermal expansion, meaning it won't break when moving between a cold solution and a hot flame.
2. Are the ends of the 9850 rod rounded?
Yes, the 9850 series features polished, fire-finished ends to prevent scratching your glassware and to ensure safety during handling.
3. Can these rods be autoclaved?
Absolutely. These rods are fully autoclavable and can be sterilized repeatedly without losing their transparency or strength.
4. Which size is best for a 500ml beaker?
For a 500ml beaker, the 205mm or 255mm length is typically preferred to ensure enough rod remains outside the beaker for a comfortable grip.
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