Marine Iodine Ingredients

Seawater holds iodine in vanishingly small amounts, yet the sea remains one of the world's great iodine reservoirs — because of seaweed. Brown algae such as the kelps Laminaria and Saccharina pump dissolved iodide out of the surrounding water and store it at concentrations thousands of times higher than the ocean itself, sometimes reaching thousands of micrograms per gram of dry tissue. This natural concentration engine is why marine algae, not seawater, are the raw material behind the iodine compounds that laboratories, feed producers and chemical plants depend on. Eata Marisource supplies marine iodine ingredients in extracted, salt and organic forms, for research and industrial applications.

Iodine chemistry is surprisingly rich for a single element. In marine biomass it exists mainly as iodide ions, with smaller fractions of iodate and organic iodine such as the iodinated amino acids mono- and di-iodotyrosine; outside the biomass it can be liberated as the deep-violet element itself, or fixed into potassium iodide, potassium iodate and a wide family of iodine derivatives. Each form has its own solubility, stability and reaction profile, and each finds its own home in the laboratory and the factory. The catalogue below maps the marine iodine forms we currently offer.

The Sea's Iodine Treasury

Iodine was discovered through seaweed. In 1811 the French chemist Bernard Courtois added sulphuric acid to ashes of kelp and watched a violet vapour rise, condensing into dark, lustrous crystals — the element we now call iodine, named after the Greek word for violet. Two centuries later, the same marine pathway still feeds modern industry, and the biology behind it is even more striking than the story:

• Extreme bioaccumulation — kelps can concentrate iodine up to roughly 30,000-fold over seawater, reaching dry-weight levels of several thousand mg/kg.
• Brown algae lead the field — kelps and fucoids carry far more iodine than red or green seaweeds; kombu, oarweed and sugar kelp are among the richest natural sources known.
• Chemical diversity — iodide, iodate and organically bound iodine co-exist in marine biomass, giving formulators a palette of starting points.
• Renewable sourcing — seaweed-based iodine production is independent of mineral reserves and concentrated in coastal regions with long cultivation traditions.

Image 1 — Fresh kelp fronds, the living concentrator of marine iodine

Image 2 — Dried kelp, the stable raw material for iodine extraction

Product Range

Our marine iodine portfolio spans the forms most often requested by researchers and industrial chemists:

• Kelp iodine extracts — aqueous or alcohol extracts of brown algae with defined iodine content, retaining the natural iodide-organic profile.
• Marine-derived iodides — potassium iodide and sodium iodide produced from seaweed iodine, in crystalline and solution forms.
• Organic iodine concentrates — fractions enriched in iodinated amino acids and protein-bound iodine for nutrition research and specialty applications.
• High-purity iodine — sublimed elemental iodine with tight assay, for synthesis and analytical work.
• Dried seaweed powders — whole-kelp and algal flours with certified iodine content for feed and formulation trials.

Image 3 — Lustrous violet-black iodine crystals, the element itself

Forms of Marine Iodine

Matching the right iodine species to your process saves time at every stage. Here is how the main marine forms behave:

• Iodide (I⁻) — the dominant species stored in kelp; highly soluble and reactive, the workhorse for most salt and solution applications.
• Iodate (IO₃⁻) — an oxidized form with distinct stability behaviour, valued where controlled release or different redox chemistry is required.
• Organic iodine — iodinated amino acids and protein-bound species, gentler and more complex, used in nutritional and biochemical research.
• Elemental iodine (I₂) — the violet-black crystalline form, the starting point for synthetic work and analytical standards.

Image 4 — Violet iodine vapour, the historic signature of marine iodine chemistry

Product Portfolio at a Glance

Table 1 — Product Portfolio at a Glance

From Kelp to Compound

Turning brown algae into a defined iodine product follows a well-trodden route that begins with cleaning and drying the harvest, then liberates and stabilizes the element:

• Hot-water extraction — warm water releases soluble iodide and iodinated organics from the dried biomass.
• Ion exchange and concentration — resins and membrane steps enrich the iodine stream to target strength.
• Oxidation and sublimation — acid oxidation liberates elemental iodine, which is sublimed and condensed as high-purity crystals.
• Salt formation — reaction with potassium or sodium bases yields the iodide salts used across industry.

Because iodine sublimes readily and oxidizes under light and heat, handling and packaging are as important as chemistry. Every marine iodine product we ship is stabilized, assayed and packed with its volatility in mind.

Image 5 — White crystalline potassium iodide, a marine iodine salt for research

Quality and Data

• Assay and content — total iodine by titration or ICP-MS, with speciation data (iodide, iodate, organic) where relevant.
• Purity control — heavy metals, arsenic and other trace elements reported per lot.
• Physical data — moisture, particle size and solubility matched to your process.
• Source traceability — algal species, harvest region and extraction records for every batch.
• Stability guidance — recommended storage, light protection and handling for volatile and hygroscopic forms.

Custom Iodine Solutions

A specific assay, a particular salt, a special algae source — our custom iodine service is built around your target specification:

• Target iodine content — formulate extracts and salts to a defined assay range.
• Form and species — choose iodide, iodate, organic or elemental forms to fit your chemistry.
• Source algae — from Laminaria, Saccharina, Undaria or other species to match your raw-material story.
• Packaging and scale — analytical vials, sealed drums or custom dosing formats for production trials.

Tell us the iodine species, concentration and application you have in mind, and we will propose a marine iodine solution built around it. Contact Eata Marisource with your requirements and we will take it from there.

Image 6 — Amber glass bottles, the standard light-protective packaging for iodine reagents

For Research or Industrial Raw Materials, Not For Personal Medical Use!