Normax Volumetric Flask Clear Glass with Glass Stopper 31 686 36V 250 mL
The Normax Volumetric Flask 31 686 36V (250 mL) delivers Class A precision for laboratories that need accurate and repeatable preparation of standard solutions. Its borosilicate glass body provides excellent clarity, strong chemical resistance, and stable thermal performance. The ground glass stopper seals the flask firmly, and the blue graduation line offers a sharp visual reference for precise meniscus alignment. Normax follows ISO 1042 specifications and includes a Certificate of Performance to ensure traceable and verified calibration for regulated workflows.
Key Features
Class A Accuracy: Meets ISO 1042 requirements and supports reliable volumetric preparation.
Ground Glass Stopper: Creates a tight seal that protects solutions from evaporation and contamination.
Borosilicate Glass: Resists heat, rapid temperature changes, and aggressive chemicals.
Blue Graduation Mark: Offers high visibility for consistent and accurate reading.
250 mL Capacity: Ideal for stock solution preparation, calibration standards, titrations, and controlled dilutions.
Certificate of Performance: Confirms traceable calibration for QA, QC, and GMP-based laboratories.
Clear Glass Body: Allows users to check solution clarity and physical appearance easily.
Specifications
| Parameter | Description |
|---|---|
| Brand | Normax |
| Model | 31 686 36V |
| Capacity | 250 mL |
| Accuracy Class | Class A |
| Material | Borosilicate Glass |
| Stopper Type | Ground Glass |
| Graduation | Blue |
| Standard | ISO 1042 |
| Certificate | Included |
| Autoclavable | Yes |
| Chemical Resistance | Excellent |
Applications
Analytical chemistry: Preparing accurate standard solutions and precise dilution series.
Pharmaceutical & QC labs: Supports regulated procedures requiring certified volumetric accuracy.
Environmental testing: Useful for preparing indicators, buffers, and calibration reagents.
Industrial R&D: Supports formulation work and controlled volumetric preparation.
Academic & research institutions: Helps students practice proper volumetric techniques with reliable Class A glassware.
Handling & Maintenance
Clean with mild, non-abrasive detergent to preserve the graduation line.
Rinse with distilled or deionized water before critical measurements.
Dry the flask’s outer surface to achieve an accurate meniscus reading.
Avoid sudden temperature changes to prevent thermal stress.
Store upright and keep the stopper separate to prevent moisture buildup.
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