Semi Refined Iota Carrageenan

Your Premier Iota Carrageenan Manufacturer Supplier in China

Iota Carrageenan is a high-molecular-weight hydrophilic polysaccharide extracted from Eucheuma Spinosum. It is also known as calcium-sensitive carrageenan, which forms soft gels in the presence of calcium ions.

Iota Carrageenan is the only carrageenan style that is freeze/ thaw stable. Thus, a frozen Iota carrageenan gel will be completely syneresis-free when thawed. It is an excellent water binder in concentrations as low as 0.2%. 

As one carrageenan supplier in China, Gino Biotech offers a wide range of carrageenans including iota semi-refined from reliable carrageenan manufacturer and producer.

Table of Contents


It is a fine granulometry powder with yellowish color and neutral odor and taste.
Iota Semi-Refined Carrageenan         Specification
Appearance White of ivory white powder
Particle Size (Mesh) 95% pass 120 mesh
Sulphate 15 - 40
Viscosity (mPa.s) ≥ 5
Moisture (%) ≤ 12
Total Ash (%) 15 - 40
Acid-insoluble Ash (%) ≤ 1.0
Acid-insoluble Matter (%) ≤ 2.0
pH 8 - 11
Arsenic (As) (ppm) ≤ 3.0
Lead (Pb) (ppm) ≤ 5.0
Cadmium (Cd) (ppm) ≤ 2.0
Mercury (Hg) (ppm) ≤ 1.0
Total Plate Count (CFU/g) ≤ 5000
Yeasts & Moulds (CFU/g) ≤ 300
Escherichia Coli Negative
Salmonella Spp./25g Negative


As one carrageenan supplier in China, Gino Biotech offers superior products from reliable carrageenan manufacturers & qualified carrageenan producers, at the same time, flexible packaging solutions could also be provided. 

We will help you boost your business and make you stand out from the competition by offering you customized packaging. 

Carton Box

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Fiber Drum

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Tin Box

Square Tin Box_Gino Biotech_Hydrocolloid Suppliers

Kraft Bag

Kraft Paper Bag_Gino Biotech_Hydrocolloid Suppliers

PP Woven Bag

PP Woven Bag_Gino Biotech_Hydrocolloid Suppliers


Semi-Refined Iota Carrageenan has excellent characteristics such as gelling, thickening, emulsifying, moisturizing, film-forming, and stable dispersion, and it is commonly compounded with kappa carrageenan and other gums, widely applied in various fields such as dairy products, meat products, cheesecakes, frozen drinks, dietary supplements, and cosmetics, etc.


E-No. E 407
Origin Seaweed extract
Chemical composition 1. Family of salts of sulphated galactans (high sulfate content 18–40%); 2. D-galactose, D-(3-6)-anhydro-galactose, sulfate ester groups
Nutritional value (in 100 g) – metabolism 0 kJ (0 kcal); No resorption
Fibre content 100% Soluble fibre
Toxicology Global approval as food additives; viscosity: minimum 5 mPa s as 1.5% solution at 75 °C (167 °F) (average MW of 100 kDa); Europe: ADI (75 mg/kg BW per day) and MW limit of maximum 5% below 50 kDa
Solubility at low temperature (H2O) κ-C: only Na+ salts are soluble, limited swelling of K+ and Ca2+ salts; ι-C: only Na+ salts are soluble, Ca2+ salt gives thixotropic swollen particles; λ-C: all salts are soluble in cold water
Appearance of an aqueous solution Clear for pure extracts, opaque-turbid for PES
Viscosity of solution in water Medium to high (hot solutions set to gels when cooling)
Impact of heat on viscosity in water (pH 7) All κ-, ι-, and λ-C types are completely soluble in water and milk at T=80 °C (176 °F)
Viscosity development in water at pH 7 (T=0–100 °C) Complete solubility in water (or milk) at T= 80 °C (176 °F), viscosity is reduced by further heating (fully reversible at pH 7-9), solutions of κ- and ι-types set to gels upon cooling, gels are stable at room temperature, gels melt by heating and re-set upon cooling without loss of gel strength or texture in neutral conditions
Shear stability Solutions are pseudoplastic (reversible shear-thinning); κ-C-gels break when sheared (irreversible); ι-C-gels break by shear, but recover and re-gel after shear stress is removed
Thickening effect High
pH stability Medium (pH 5.5-9)
Decomposition κ-C + ι-C: hydrolysis by acid (accelerated by heat, low pH value, and time); however, gels are acid-stable; λ-C: hydrolysis in acidic systems
Film formation High
Emulsion stabilization High
Gelation κ-C: strongest gels with K+; ι-C: strongest gels with Ca2+; λ-C: no gelation with cations (but gelling with very high salt concentrations)
Gel strength and gel stability κ-C: firm brittle gels with strong syneresis, not freeze-thaw stable, hysteresis 10-20 °C (18-36 °F); ι-C: soft elastic texture, no syneresis, freeze-thaw stable; λ-C: no gels, solutions are freeze-thaw stable
Gel transparency High
Tendency for gel syneresis κ-C-gels: strong syneresis; ι-C-gels: no syneresis
Impact of electrolytes (cations +, 2+, 3+) κ-C: strong gelation with monovalent potassium ions; ι-C: strong gelation with divalent calcium ions; λ-C: no impact
Reaction with Ca2+ ions Gelation with ι-carrageenan
Protein activity κ-C. forms weak gels with κ-casein in milk to stabilize neutral dairy products and particles in suspensions; ι-C. and λ-C. have a strong protein interaction in acid
Crystallization control Gels of ι-C. and solutions of λ-C. are freeze-thaw stable, gels of κ-C. exhibit syneresis
Synergistic effects with other hydrocolloids κ-Carrageenan forms synergistic gels (increased gel strength and elasticity, reduced syneresis) with galactomannans (e.g. LBG) and konjac glucomannan; synergism between starch and ι-carrageenan
Other synergistic effects Solubility in 50% sugar solutions: κ-C. is hot-soluble, ι-C. is insoluble, λ-C. is soluble; solubility in 10% salt solutions: κ-C. is insoluble, ι-C. and λ-C. are hot-soluble
Negative interactions -
Dosage level in foods Low to medium (typical 0.02-3%)


Successful Additive

Carrageenan is one of the most popular and successful food additives in the world, for stabilizing, thickening, and gelling food systems.

Unique functional characteristics

It provides unique functional characteristics in food products and non-food systems.

Rich in antioxidants

Carrageenan has antioxidant activity and other properties that make it useful in health supplements.

Improve digestive system

Carrageenan influences the development of beneficial microbial communities in the digestive tract.

Lower Cholesterol Levels

Study shows that carrageenan can reduce lipid levels and blood cholesterol levels.


Carrageenan plays an important and valued role in modern-day formulations providing texture, structure and physical stability in food and non-food products.

It is also used for cost reduction and added value.

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Gino Biotech will always be your best supplier and a good partner for carrageenan and other hydrocolloids from China.  We only select the most suitable carrageenan manufacturer and carrageenan producer.


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