Normax Volumetric Flask Clear Glass with Plastic Stopper 31 686 11 20 mL
The Normax Volumetric Flask 31 686 11 (20 mL) delivers Class A accuracy for laboratories that require precise preparation of small-volume standard solutions. Its borosilicate glass body offers excellent clarity, strong chemical durability, and stable thermal performance. The plastic stopper seals the flask securely, and the blue graduation mark provides a clear reference point for accurate meniscus alignment. Built according to ISO 1042, this flask comes with a Certificate of Performance, ensuring traceable accuracy for regulated analytical work.
Key Features
Class A Precision: Meets ISO 1042 standards and supports reliable volumetric measurements.
Plastic Stopper: Creates a secure, lightweight seal and protects solutions from contamination.
Borosilicate Glass: Resists thermal shock, harsh chemicals, and daily laboratory use.
Blue Graduation Line: Provides high contrast to help users achieve correct meniscus alignment.
20 mL Capacity: Ideal for preparing standard solutions, calibration reagents, and controlled dilutions.
Certificate of Performance: Verifies traceable calibration for SOP/GMP compliance.
Clear Glass Body: Allows full visibility for checking clarity and purity of solutions.
Specifications
| Parameter | Description |
|---|---|
| Brand | Normax |
| Model | 31 686 11 |
| Capacity | 20 mL |
| Accuracy Class | Class A |
| Material | Borosilicate Glass |
| Stopper Type | Plastic |
| Graduation | Blue |
| Standard | ISO 1042 |
| Certificate | Included |
| Autoclavable | Flask yes; stopper depends on plastic type |
| Chemical Resistance | Excellent |
Applications
Analytical chemistry: Preparing micro-volume standards and precise dilution series.
Pharmaceutical & QC labs: Essential for regulated workflows requiring certified accuracy.
Environmental testing: Suitable for indicator preparation and trace-level reagent work.
Industrial R&D: Supports micro-formulation and controlled solution preparation.
Academic & research facilities: Helps students practice accurate volumetric techniques.
Handling & Maintenance
Clean with mild, non-abrasive detergent to protect the graduation line.
Rinse with distilled or deionized water before precise measurements.
Dry the flask’s exterior to achieve accurate meniscus reading.
Avoid sudden temperature changes to maintain glass integrity.
Store upright and keep the stopper separate to avoid internal moisture buildup.
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