Test Tubes (Pack of 100)
Product Code : SCL-CLE-11919
The StemAids Test Tube is the primary vessel for small-scale qualitative analysis, chemical reactions, and biological cultures. Engineered for high thermal stability and chemical neutrality, these tubes allow for the observation of color changes, precipitate formation, and gas evolution. Manufactured to ISO 4142 standards, this bulk pack of 100 ensures that institutional laboratories remain fully stocked for high-enrollment cohorts and high-turnover experimental procedures.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material |
Grade A Borosilicate Glass 3.3 (Expansion 33) or Neutral Soda-lime |
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Standard Sizes |
12×75mm,15×125mm,18×150mm,25×150mm |
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Rim Style |
Rimmed (for easy pouring/gripping) or Rimless (for centrifugation/stoppers) |
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Wall Thickness |
Medium-wall (1.0mm–1.2mm) for durability and heat transfer |
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Thermal Resistance |
Withstands direct Bunsen burner flame and rapid cooling |
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Chemical Resistance |
High resistance to acids, alkalis, and organic solvents |
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Quantity |
Bulk Pack of 100 units |
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ISO Compliance |
Manufactured under ISO 9001:2015 and ISO 4142 standards |
Key Pedagogical & Laboratory Outcomes
- Reaction Interface: Facilitates the observation of Chemical Phenomena. The high-clarity glass allows learners to identify subtle transitions such as effervescence, luminescence, and turbidity.
- Thermal Quantification: Enables safe heating of reagents; learners apply the test tube to a flame (using a holder) to record boiling points or decomposition temperatures of various hydrates.
- Micro-Scale Analysis: Supports the analysis of "Solubility and Precipitation"; students evaluate the formation of complex ions by adding reagents drop-wise and observing the result in the narrow column of the tube.
- Biological Evaluation: In microbiology, these tubes serve as the interface for evaluating bacterial growth in broth or for creating "agar slants" for long-term culture storage.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade, double-walled corrugated boxes. Every set of 100 is nested in grid-style cardboard dividers to prevent glass-to-glass contact, ensuring a "zero-breakage" arrival rate during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and Material Safety Data Sheet (MSDS).
- Durability: Borosilicate 3.3 models are specifically annealed to reduce internal stress, making them significantly more resistant to cracking during repeated "heating-and-quenching" cycles compared to standard glass.
Direct OEM Sourcing Advantages
Procuring StemAids Test Tubes directly ensures vertical manufacturing control:
- Uniform Wall Thickness: Direct oversight of the drawing process ensures there are no "thin spots," which are the leading cause of tube failure during heating.
- Fire-Polished Rims: We ensure every tube has a smooth, rounded rim to prevent chipping and protect students from accidental cuts during handling.
- Direct Factory Inventory: Guaranteed availability of all standard sizes (from small 5ml "culture tubes" to large 50ml "boiling tubes").
- Quality Assurance: Every batch is "shock-tested" by transferring tubes directly from a 100?C oven to cold water to verify thermal integrity.
