Weighing Bottle
Product Code : SCL-CLE-11917
The StemAids Weighing Bottle is a high-precision laboratory vessel engineered for the exact weighing of hygroscopic, volatile, or reactive solid samples. Featuring a low-profile design and an interchangeable ground-glass stopper, it provides a hermetically sealed environment that prevents the sample from absorbing atmospheric moisture or losing mass through sublimation during the weighing process. Manufactured to ISO 9001:2015 standards, it is a critical instrument for Analytical Chemistry, Quantitative Analysis, and Pharmaceutical research.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material |
Grade A Borosilicate Glass 3.3 (Expansion 33) |
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Design |
Squat (low-form) or Tall-form with external/internal ground joints |
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Capacities |
15ml,25ml,40ml,50ml (Standard sizes) |
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Stopper |
Precision-ground glass (interchangeable) |
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Bottom |
Optically flat for maximum stability on analytical balance pans |
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Chemical Resistance |
Highly resistant to acids and most organic solvents |
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Thermal Resistance |
Fully autoclavable and oven-safe for drying procedures |
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ISO Compliance |
Manufactured under ISO 9001:2015 and ISO 4796 standards |
Key Pedagogical & Laboratory Outcomes
- Hygroscopic Interface: Facilitates student understanding of Atmospheric Interference. Many chemicals (like Sodium Hydroxide) gain weight by absorbing water from the air; learners identify how the sealed bottle maintains sample integrity.
- Mass Quantification: Enables "Weighing by Difference"; learners apply the technique of weighing the bottle with the sample, transferring a portion, and re-weighing to calculate the exact mass delivered.
- Drying Analysis: Supports the analysis of "Constant Mass"; students evaluate the moisture content of a sample by heating the open bottle in an oven and cooling it (stoppered) in a desiccator before weighing.
- Contamination Evaluation: Allows students to evaluate analytical precision; the high-quality glass ensures no chemical reaction occurs between the vessel and the sample, preserving the purity of primary standards.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade, high-protection packaging. Stoppers and bottles are matched at the factory to ensure a vacuum-tight fit and are interleaved with protective tissue to prevent "freezing" of the joints during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a material grade certification.
- Durability: The Borosilicate 3.3 glass is lightweight yet thermally robust, minimizing "static charge" buildup which can interfere with the readings of sensitive 4-decimal place analytical balances.
Direct OEM Sourcing Advantages
Procuring StemAids Weighing Bottles directly ensures vertical manufacturing control:
- Hermetic Joint Precision: Direct oversight of the diamond-grinding process ensures that the stopper forms a moisture-proof seal without the need for grease, which would add unwanted mass.
- Optically Flat Bases: We ensure the base is perfectly level, preventing "rocking" or instability on the balance pan—a major source of fluctuating weight readings.
- Direct Factory Inventory: Guaranteed availability of both Squat Form (for easy access with a spatula) and Tall Form (for larger volumes) to meet specific curriculum needs.
- Quality Assurance: Every batch is inspected for wall-thickness uniformity to ensure the center of gravity is centralized, promoting stability during handling.