Kjeldahl Flask (Digestion flask)

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The 250 mL Kjeldahl Flask is laboratory glassware designed for sample digestion during nitrogen determination and crude protein analysis using the Kjeldahl method. It features a rounded flask body and a long, narrow neck, with a 24/40 ground-glass joint.

CHEMICAL IDENTITY
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• Product Name: Kjeldahl Flask
• Alternative Name: Kjeldahl Digestion Flask
• Nominal Capacity: 250 mL
• Product Category: Laboratory Glassware
• Material: Glass, typically borosilicate
• Joint Size: 24/40
• Brand: Whirl LabGlass

GRADE / COMPLIANCE
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• Laboratory-grade glassware.
• Thermal and chemical resistance depend on the glass composition.
• Specific ASTM, ISO, or other compliance certifications have not been verified.

VERIFIED PRODUCT / CATALOG DETAILS
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• Product Type: Kjeldahl Flask
• Capacity: 250 mL
• Joint Specification: 24/40
• Design: Rounded body with an elongated narrow neck
• Brand Marking: Whirl LabGlass
• Manufacturer catalogue number: Not verified.

PRODUCT SPECIFICATIONS
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• Nominal Capacity: 250 mL
• Flask Body: Rounded digestion vessel
• Neck Design: Long, narrow neck
• Joint Type: Ground-glass joint
• Joint Size: 24/40
• Graduations: Not indicated
• Colour: Clear
• Reusability: Reusable
• Heating Compatibility: Subject to the manufacturer’s glass composition and thermal specifications.

PHYSICAL & CHEMICAL PROPERTIES
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• Appearance: Transparent glass flask.
• Shape: Rounded body with a long, narrow neck.
• Chemical Resistance: Depends on the glass composition and the chemicals used.
• Thermal Resistance: Depends on the glass type and operating conditions.
• Thermal Shock Resistance: Avoid sudden temperature changes.

APPLICATIONS
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• Digestion of samples for total nitrogen determination.
• Crude protein analysis using the Kjeldahl method.
• Digestion of food, plant, agricultural, and biological samples.
• Sample preparation for subsequent nitrogen analysis.
• Laboratory digestion procedures requiring a compatible flask and heating arrangement.

STORAGE CONDITIONS
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• Store in a clean, dry laboratory cabinet.
• Protect the flask from impact and mechanical stress.
• Keep the ground-glass joint clean and free from scratches.
• Store securely to prevent accidental breakage.

SAFETY INFORMATION
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• Inspect for cracks, chips, or other defects before use.
• Wear appropriate laboratory PPE, including safety goggles, gloves, and a laboratory coat.
• Perform acid digestion in a suitable fume hood.
• Use appropriate heating equipment and avoid direct heating unless the flask is specifically designed for that use.
• Handle hot glassware with suitable heat-resistant protection.
• Allow controlled cooling before handling or cleaning.
• Never use damaged glassware for digestion.

PACKAGING INFORMATION
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• Unit of Supply: 1 piece.
• Nominal Capacity: 250 mL.
• Packaging: Protective packaging suitable for laboratory glassware.
• Supplied as an individual flask unless otherwise specified.

MANUFACTURER / BRAND
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• Brand: Whirl LabGlass
• Product: 250 mL Kjeldahl Flask
• Joint Size: 24/40
• Manufacturer’s official catalogue details: Not independently verified.

WLS PROFESSIONAL INSIGHT
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The 250 mL Kjeldahl Flask is suitable for laboratory digestion procedures associated with nitrogen and crude protein determination. Its rounded body accommodates liquid samples during digestion, while the elongated neck provides convenient handling and connection compatibility with suitable ground-glass