Lugol's Iodine Solution has long been recognised for its versatile applications in medicine, science, and emergency preparedness. Available in concentrations ranging from 5% to 15%, this potent iodine solution is a staple in many UK households, laboratories, and health settings. Whether you are looking for an effective antiseptic, a supplement for iodine deficiency, or a laboratory reagent, understanding how to safely and effectively use Lugol's Iodine is essential.

In this comprehensive guide, we will explore the composition, history, applications, safety protocols, and purchasing options for Lugol's Iodine Solution 5–15%. You'll also find dosage examples in grams and litres, along with a detailed FAQ section to answer the most common queries.

What is Lugol's Iodine Solution?

Lugol's Iodine Solution is an aqueous mix of elemental iodine (I₂) and potassium iodide (KI) dissolved in distilled water. First developed in 1829 by French physician Jean Guillaume Auguste Lugol, it was initially created as a remedy for tuberculosis. Since then, its usage has expanded widely due to its antimicrobial and iodine-supplementing properties.

Composition

A standard Lugol's Iodine Solution includes:

• Elemental Iodine (I₂): 5% by weight

• Potassium Iodide (KI): 10% by weight

• Distilled Water: 85% by weight

Solutions may also be available in higher concentrations, such as 7%, 10%, or even 15%, increasing the iodine content and efficacy for certain applications.

Key Applications of Lugol's Iodine Solution

1. Medical and Health Uses

a. Thyroid Function Support

Lugol's solution is often used to support thyroid health, especially in cases of hyperthyroidism or during pre-operative preparation for thyroid surgery. The iodine saturates the thyroid gland and helps reduce hormone production and gland vascularity.

Example Dosage: A typical medical dosage may involve taking 2 drops (approximately 0.1 ml) of 5% Lugol's solution daily, which provides around 12.5 mg of iodine.

b. Iodine Supplementation

Many people are iodine-deficient, especially in areas with low iodine in the soil. Under a doctor's supervision, Lugol's Iodine can be used as a supplement to restore healthy iodine levels.

c. Radiation Exposure

In the event of nuclear fallout, iodine tablets or Lugol's Iodine are administered to saturate the thyroid gland with stable iodine, preventing uptake of radioactive iodine isotopes.

2. Antiseptic and Disinfectant

Lugol's Iodine is a strong antiseptic. It is applied topically to disinfect wounds, sterilise skin before surgery, and treat minor infections.

Usage Example: For wound care, apply a few drops (0.1–0.5 ml) directly to the area using a sterile swab.

3. Laboratory and Educational Use

a. Starch Testing

Lugol's solution is commonly used in food science and biology to detect the presence of starch. A blue-black coloration indicates a positive result.

b. Microscopy Staining

Biologists use Lugol's Iodine to stain cells and highlight features such as nuclei and organelles in microscopic samples.

4. Water Purification

In emergency or survival situations, Lugol's Iodine can purify water.

Usage Example: Add 5 drops of 5% solution to 1 litre of clear water and wait 30 minutes before drinking.

5. Veterinary and Agricultural Applications

Lugol's Iodine is sometimes used in animal care for disinfecting wounds and in agriculture for nutrient supplementation in livestock.

🧬 Radiation Emergencies: Using Lugol’s Iodine After a Nuclear Accident

In the event of a nuclear power plant malfunction or explosion, one of the most immediate public health threats is the release of radioactive iodine-131 (I-131) into the atmosphere. This radioactive isotope can be rapidly absorbed by the thyroid gland, especially in children and young adults, increasing the risk of thyroid cancer. In such cases, Lugol’s Iodine Solution can serve as a critical first-line protective measure.

☢️ How Radiation Exposure Affects the Thyroid

Radioactive iodine behaves in the body like stable iodine, concentrating in the thyroid gland. When I-131 is inhaled or ingested, it can lodge in the thyroid and emit beta radiation, damaging cells and significantly increasing cancer risk.

🧪 Why Use Lugol’s Iodine?

Lugol’s Iodine Solution is rich in non-radioactive iodine (I₂) and potassium iodide (KI). When taken correctly and in time, it saturates the thyroid gland with stable iodine, effectively blocking the absorption of radioactive iodine. This process is called thyroid blockade.

⏱️ Timing Matters

The protective effect of Lugol’s Iodine is highest if taken within 2–6 hours before or immediately after exposure. Even if taken up to 24 hours later, it can still provide partial protection.

💊 Recommended Dosage of Lugol’s Iodine for Radiation Protection

The amount of iodine needed to block radioactive iodine uptake is much higher than nutritional levels. Lugol’s Iodine must be dosed carefully and only under emergency guidance. The World Health Organization (WHO) and various nuclear preparedness bodies recommend the following single daily doses during exposure:

🧴 Note: 1 drop of 5% Lugol's Iodine contains approximately 6.25 mg of iodine (2.5 mg I₂ and 3.75 mg KI).

Always dilute the drops in water or juice to reduce irritation, and take only once daily during risk periods as instructed by health authorities.

🚸 Special Populations and Risks

• Pregnant and breastfeeding women need iodine to protect both themselves and their baby, but overuse can cause fetal or neonatal hypothyroidism.

• Infants and elderly individuals are more sensitive to iodine; medical supervision is crucial.

• Do not use Lugol’s Iodine preventively unless there is confirmed exposure or risk of radioactive iodine.

🧼 Other Measures During Radiation Exposure

While Lugol’s Iodine is essential for thyroid protection, it does not protect against other radioactive materials or external radiation. Combine its use with:

• Staying indoors with sealed windows.

• Turning off ventilation systems.

• Taking shelter in interior rooms or basements.

• Listening to government emergency broadcasts.

❌ Side Effects and Warnings

While generally safe in short-term emergency use, overuse or unnecessary ingestion of Lugol’s Iodine can cause:

• Thyroid suppression or hyperactivity.

• Iodine poisoning (nausea, vomiting, stomach pain).

• Allergic reactions (rash, swelling, breathing difficulty).

🚫 Do not self-medicate with iodine supplements during a nuclear event unless specifically advised by public health officials.

📍Where to Buy Lugol’s Iodine in the UK for Emergency Use

For those looking to be prepared for potential nuclear emergencies, it’s advisable to keep a supply of Lugol’s Iodine at home. You can buy Lugol’s Iodine Solution UK online from HD Chemicals LTD, which offers 5%, 10%, and 15% concentrations in high-purity formats suitable for emergency and laboratory use.

Safe Handling and Storage

• Wear gloves when handling high concentrations.

• Avoid ingestion unless prescribed by a healthcare professional.

• Store in a cool, dark place in tightly sealed amber glass bottles.

• Keep out of reach of children.

Side Effects and Precautions

• Iodism: Chronic overuse may result in symptoms like metallic taste, salivation, and headache.

• Allergic Reactions: Rash, swelling, or difficulty breathing require immediate medical attention.

• Thyroid Dysfunction: Excessive intake may cause hypo- or hyperthyroidism.

Where to Buy Lugol's Iodine Solution in the UK

If you're looking for a reliable source, HD Chemicals is a trusted UK supplier of high-quality Lugol's Iodine Solution in various strengths.

👉 Where to buy Lugol's Iodine Solution UK online

They offer solutions in convenient volumes for home, laboratory, and professional use, with fast UK shipping and secure packaging.

Example Usage Scenarios with Measurements

For Supplementation (under medical supervision):

• 1 drop (5% solution) ≈ 6.25 mg of iodine

• Daily dosage (12.5 mg) = 2 drops in a glass of water (approx. 250 ml)

For Water Disinfection:

• 5 drops (5% solution) per 1 litre of clear water

• Wait 30 minutes before drinking

For Antiseptic Use:

• Apply 0.1 to 0.5 ml (approx. 2–10 drops) directly to wounds using sterile gauze or cotton

For Laboratory Starch Test:

• Add 2–5 ml of Lugol's solution to a 100 ml solution sample

• Observe colour change for starch presence

FAQs About Lugol's Iodine Solution

1. Can Lugol's Iodine be taken orally? Yes, but only under medical supervision to prevent iodine overdose.

2. Is Lugol's Iodine safe for children? It can be used in small amounts with paediatrician approval.

3. Does Lugol's Iodine expire? Yes. Shelf life is usually 2–3 years. Store in cool, dark conditions.

4. Can it be used on pets? Yes, for minor antiseptic needs, but consult a vet first.

5. Is it suitable for vegans? Yes, it contains no animal-derived ingredients.

6. Can I use it to clean fruits or vegetables? No, it is not recommended for food disinfection.

7. Is Lugol's the same as povidone-iodine? No. Lugol's is a simple iodine solution; povidone-iodine is iodine complexed with a polymer.

8. Can I travel with Lugol's Iodine? Yes, in original packaging and under liquid travel limits (usually 100 ml).

9. How much iodine is in 1 drop of 15% Lugol's? Approximately 18.75 mg per drop.

10. Where can I find more information? Visit HD Chemicals UK chemical supplier for more details and product listings.

This guide aims to demystify Lugol's Iodine Solution, highlighting its powerful properties and safe use practices. For reliable sourcing and further information, trust HD Chemicals as your go-to UK supplier.