Corning Pyrex 99445-16 Borosilicate 15mL Rimless Culture Tube

Description

Product Overview

The Corning Pyrex 99445-16 culture tube is engineered from premium borosilicate glass, a material renowned for its superior thermal shock resistance, chemical inertness, and optical clarity. With a precise 15 mL internal volume, a rimless cylindrical shape, a 16 mm outer diameter, and a 100 mm overall height, the tube delivers a compact yet spacious chamber ideal for a wide range of microbiological and biochemical procedures. The clear glass construction enables effortless visual inspection of cultures, precipitates, and color changes without the need for additional lighting or instrumentation. The rimless design eliminates the common snag points associated with traditional lip‑edged tubes, reducing the risk of breakage during handling, autoclaving, or high‑speed centrifugation. Each tube is manufactured to strict dimensional tolerances, ensuring uniform fit within standard incubators, shakers, and storage racks, thereby streamlining workflow and minimizing variability across experiments. The product is supplied in bulk cases of 1,000 units, providing laboratories with a reliable inventory that supports high‑throughput screening, routine sample processing, and long‑term research projects.

Usage

Designed for versatility, the 15 mL Pyrex culture tube excels in cell culture, microbial growth, enzyme assays, and small‑scale chemical syntheses. Researchers can inoculate the tube directly with liquid media, solid agar slants, or powdered substrates, then seal it with compatible caps or stoppers for sterile incubation at temperatures ranging from 4 °C to 121 °C. The tube’s robust glass composition tolerates repeated autoclave cycles, making it suitable for sterilization protocols that require high pressure and steam exposure. In addition, the rimless profile facilitates easy insertion into orbital shakers, rotary incubators, and vortex mixers, allowing for uniform agitation and gas exchange. The clear walls support spectrophotometric measurements, enabling real‑time monitoring of optical density or absorbance without transferring the sample to a cuvette. Laboratories engaged in environmental testing, pharmaceutical development, and academic research benefit from the tube’s ability to maintain sample integrity during prolonged storage, transport, and analysis. Its compatibility with standard laboratory equipment, such as magnetic stir bars, temperature probes, and pH electrodes, further expands its applicability across diverse experimental setups.

Why Choose Us

Corning, a global leader in glass science, brings over a century of expertise to the development of laboratory glassware, ensuring that each Pyrex culture tube meets rigorous quality standards and regulatory requirements. The manufacturing process incorporates advanced annealing techniques that relieve internal stresses, resulting in a product that resists cracking under rapid temperature fluctuations and mechanical shock. Each batch undergoes comprehensive inspection for dimensional accuracy, surface finish, and optical clarity, guaranteeing consistency that researchers can trust. The brand’s commitment to sustainability is reflected in the recyclable nature of borosilicate glass, reducing environmental impact while delivering a durable, long‑lasting solution. Customer support includes technical assistance, detailed product documentation, and responsive service teams ready to address any inquiries related to usage, compatibility, or troubleshooting. By choosing Corning Pyrex, laboratories gain access to a proven, high‑performance glassware line that integrates seamlessly into existing protocols, minimizes experimental error, and enhances overall productivity.

Key Features

• Premium borosilicate glass provides exceptional thermal and chemical resistance for reliable performance.
• Rimless design reduces breakage risk and simplifies handling during high‑speed centrifugation and shaking.
• Clear, optically pure walls enable easy visual monitoring and direct spectrophotometric measurements.
• Standard 15 mL volume and 16 mm OD fit seamlessly into common incubators, racks, and automation systems.
• Comprehensive after‑sales support ensures quick resolution of technical questions and reliable product guidance.

FAQ

Can the tube be autoclaved multiple times without compromising its integrity?

Yes, the Pyrex 99445-16 tube is constructed from borosilicate glass, which is specifically engineered to withstand repeated autoclave cycles at 121 °C. The material’s low coefficient of thermal expansion prevents cracking or deformation, allowing laboratories to sterilize the tubes multiple times while maintaining structural integrity and optical clarity.

What types of caps or closures are compatible with this rimless tube?

The rimless design is compatible with a variety of standard laboratory caps, including screw‑cap, snap‑cap, and silicone septum closures that feature a matching 16 mm outer diameter. Users should select caps made from chemically resistant materials such as polypropylene or PTFE to ensure a tight seal and prevent leaching of contaminants into the sample.

Is the tube suitable for use with magnetic stir bars or other internal accessories?

Absolutely. The internal diameter of the 15 mL tube provides ample space for small magnetic stir bars, glass beads, or pH electrodes. The clear glass walls allow for unobstructed observation of stirring action, and the rimless profile ensures that accessories can be inserted and removed without interference from lip edges.

How does the rimless design affect sample evaporation during long‑term incubation?

While the rimless shape eliminates the traditional lip, it does not inherently increase evaporation when a proper cap is used. By sealing the tube with an appropriate screw‑cap or septum, the internal environment remains closed, minimizing moisture loss. For applications requiring extended incubation at elevated temperatures, users should verify that the chosen closure provides a vapor‑tight seal.

What is the recommended storage condition for unused tubes?

Unused Pyrex culture tubes should be stored in a clean, dry environment away from direct sunlight and extreme temperature fluctuations. Keeping the tubes in their original packaging or a dedicated glassware cabinet helps protect them from dust and mechanical damage, preserving their optical clarity and dimensional accuracy for future use.

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