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Lugol's iodine Lugol 's Liquid Potassium Iodide Iodine Solution - 100ml
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Description
Lugol's Iodine Solution
Other Names: Lugol’s Liquid, Iodine-Potassium Iodide Solution
CAS Number: Mixture (Iodine: 7553-56-2; Potassium Iodide: 7681-11-0)
General Formula: Typically contains ~5% elemental iodine (I₂) and ~10% potassium iodide (KI) in distilled water
Appearance: Reddish-brown liquid with a strong iodine odor
Chemical and Physical Properties
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Solubility: Miscible with water
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Density: ~1.02–1.05 g/cm³ (depending on concentration)
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Boiling Point: Similar to water (~100 °C), but may vary slightly
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pH: Mildly acidic
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Stability: Light-sensitive; store in amber glass containers
Applications
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Starch Testing: Used as an indicator in starch detection (blue-black color reaction)
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Microscopy and Histology: Employed as a staining and contrast agent
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Titration Reagent: Used in redox titrations involving iodine
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Disinfectant and Preservative (non-food/lab context): For surfaces and specimens in controlled settings
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Education and Demonstrations: Common in chemical education for illustrating iodine reactions
Safety Information
Signal Word: ⚠️ Warning
H302+H312+H332 (24.1%): Harmful if swallowed, in contact with skin or if inhaled [Warning Acute toxicity, oral; acute toxicity, dermal; acute toxicity, inhalation]
H302 (40.5%): Harmful if swallowed [Warning Acute toxicity, oral]
H312 (99.5%): Harmful in contact with skin [Warning Acute toxicity, dermal]
H315 (51.5%): Causes skin irritation [Warning Skin corrosion/irritation]
H319 (49.2%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H332 (99.6%): Harmful if inhaled [Warning Acute toxicity, inhalation]
H335 (45.4%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
H372 (45.8%): Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H400 (99.5%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 (10.9%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
P260, P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501
Handling and Storage
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Handling: Avoid skin and eye contact; use in a well-ventilated area
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Storage: Store in tightly sealed amber glass containers in a cool, dark place. Avoid contact with metals and strong reducers