Dragendorff’s Spray Reagent
Dragendorff’s Spray Reagent is a classical qualitative reagent used for the detection of alkaloids and other nitrogen-containing compounds. It produces an orange to reddish-brown coloration or precipitate upon reaction.
Chemical Name
Potassium bismuth iodide solution (mixture)
Synonyms
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Dragendorff’s Reagent
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Alkaloid Detection Reagent
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Potassium Bismuth Iodide Reagent
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TLC Alkaloid Spray Reagent
CAS Number
Mixture (no single CAS number)
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Bismuth nitrate: 10035-06-0
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Potassium iodide: 7681-11-0
Appearance
Orange to reddish-brown solution
Key Properties
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Highly sensitive to alkaloids
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Produces coloured complexes or precipitates
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Suitable for spray application
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Fast reaction time
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Stable when properly stored
Uses
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Detection of alkaloids in pharmaceuticals and natural products
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Thin-Layer Chromatography (TLC) visualisation
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Forensic and toxicology analysis
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Research and educational laboratories
Storage
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Store in tightly closed, amber container
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Keep in a cool place away from light
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Avoid contamination
Safety & Handling (SDS Summary)
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Corrosive; may cause skin and eye irritation
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Harmful if swallowed
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Contains iodine and bismuth compounds
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Use PPE: gloves, lab coat, safety goggles
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Use in well-ventilated areas
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Dispose of as hazardous laboratory waste
| Weight | 1 kg |
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