Description
Pyrex Test Tube with Black Cap 6 Inch – Comprehensive Product Guide
The Pyrex Test Tube with Black Cap 6 Inch Clear Glass Tube is an essential component for any modern laboratory setting. Known for its exceptional thermal resistance and chemical durability, this specific 150mm Pyrex glass test tube with black cap is designed to meet the rigorous demands of scientific research, industrial testing, and educational experiments. Whether you are conducting volatile chemical reactions or simple sample storage, the Pyrex brand ensures reliability that generic glassware cannot match.
Technical Specifications of the Pyrex 6 Inch Glass Test Tube with Screw Cap
Precision is the hallmark of professional laboratory work. The 150mm Pyrex glass test tube with black cap features a standardized 16mm diameter, providing a slim yet sturdy profile for various rack systems. Manufactured from high-quality borosilicate glass, these tubes are engineered to withstand significant thermal shock.
The inclusion of the black phenolic screw cap is a critical design feature. Unlike open-top tubes, the Pyrex test tube with black screw top provides an airtight seal. This prevents evaporation, protects against contamination, and allows for the safe transport of liquid or powder samples. The internal liner of the cap is typically resistant to most acids and alkalis, ensuring the integrity of your stored substances.
Superior Material Benefits of Borosilicate Glass
When searching for a borosilicate glass test tube with black lid, material composition is the most important factor. Pyrex glassware is famous for its low coefficient of thermal expansion. This means the high temperature resistant glass test tubes with caps can be moved from a heat source to a cold environment without cracking.
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Thermal Stability: These tubes can withstand temperatures up to several hundred degrees Celsius.
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Chemical Inertness: The glass does not react with the contents, ensuring that experimental results remain pure.
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Clarity: The clear glass culture tubes 150mm offer 100% optical transparency, which is vital for observing color changes or precipitate formation during chemical reactions.
Industrial Applications for the 150mm Pyrex Test Tube with Black Cap
The versatility of the Pyrex 6 inch test tube makes it a staple across multiple sectors in Bangladesh. In clinical laboratories, these tubes are frequently used for blood samples and centrifugation. In the field of microbiology, they serve as ideal culture tubes for growing bacteria or fungi under sterile conditions.
Industrial quality control departments rely on the Pyrex laboratory glassware tubes for testing raw materials. Because the black screw cap provides a leak-proof seal, they are also favored by the fragrance and essential oil industries for sample distribution. The heat resistant Pyrex tubes with airtight black caps ensure that volatile compounds do not escape, preserving the scent profile and chemical structure of the product.
Pyrex Test Tube Price in Bangladesh and Availability
For professionals looking to buy Pyrex test tubes online Bangladesh, price and authenticity are the primary concerns. The Pyrex test tube price in BD can vary based on the quantity ordered and the specific dimensions. While generic glass tubes are available at a lower cost, investing in genuine Pyrex ensures safety and longevity.
A Rahman Scientific Co. serves as a leading glass test tube importer in Bangladesh, providing bulk options for universities, hospitals, and private research firms. Buying from a verified Pyrex test tube with black cap supplier ensures you receive genuine borosilicate glass rather than soda-lime glass, which is prone to breaking under thermal stress.
Proper Care and Sterilization for Long-Term Use
To maintain the longevity of your 6 inch glass lab tubes, proper cleaning protocols must be followed. These tubes are fully autoclavable. However, it is recommended to remove the black caps before placing them in an autoclave unless the caps are specifically rated for high-pressure steam sterilization.
Using specialized brushes for scientific glass containers prevents scratching the interior surface. Scratches can lead to structural weaknesses over time, especially when the tube is subjected to high heat. As a trusted laboratory glassware dealer Bangladesh, we recommend a thorough rinse with distilled water after chemical cleaning to remove any residual ions that might interfere with future experiments.
Why Choose Pyrex Over Generic Glassware?
When evaluating laboratory glassware, the distinction between Pyrex and “heat-resistant” generic brands is significant. Pyrex undergoes a rigorous annealing process that removes internal stresses within the glass. This makes the screw cap Pyrex test tubes much safer for students and lab technicians to handle.
In a busy lab, accidents happen. The durability of the Pyrex 6 inch glass test tube with screw cap means fewer replacements and less downtime. Furthermore, the standardized sizing ensures that they fit perfectly into standard 16mm test tube racks, heating blocks, and centrifuges available in the Bangladeshi market.
Reliability in Educational and Research Settings
For educational institutions in Dhaka and across Bangladesh, the clear glass test tubes for laboratory use 6 inch are the preferred choice for chemistry and biology kits. They provide a safe environment for students to learn about exothermic reactions. Researchers seeking a wholesale Pyrex test tubes Dhaka source often prioritize the 150mm x 16mm dimensions due to its universal compatibility with existing laboratory hardware.
The black screw cap is particularly useful in school settings to prevent accidental spills of reagents. By choosing a reputable laboratory equipment seller, schools can ensure they are providing students with tools that meet international safety standards.
Summary of Key Features
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Brand: Authentic Pyrex Borosilicate Glass.
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Size: 6 Inches (150mm) length by 16mm diameter.
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Closure: Leak-proof black phenolic screw cap with liner.
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Resistance: High resistance to thermal shock and chemical corrosion.
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Visibility: Ultra-clear glass for precise visual monitoring.
Where to Buy 6 Inch Pyrex Test Tubes in BD
Finding a reliable laboratory equipment supplier is the final step in securing your laboratory’s needs. Whether you are looking for a single unit for a specialized test or seeking a wholesale Pyrex test tubes Dhaka partner for a large-scale facility, choosing a supplier with a proven track record of quality is essential. Authentic Pyrex products should always come with the distinct branding and meet the physical weight expectations of high-density borosilicate glass.
A Rahman Scientific Co. is the best laboratory equipment seller and supplier in Bangladesh.
For genuine laboratory equipment, A Rahman Scientific Co. is the most trusted supplier in Bangladesh.


























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