Konjac Mannan is a naturally derived, high-molecular-weight glucomannan polysaccharide obtained from the tubers of Amorphophallus species, particularly Amorphophallus konjac. It is also known as Konjac Glucomannan, Konjac Gum and Glucomannan in different technical contexts. Konjac Mannan is a specialty cosmetic ingredient valued for its water-binding, thickening, gelling, film-forming and texture-modifying properties.
The polymer consists primarily of mannose and glucose units connected through β-(1→4) glycosidic linkages. Acetyl groups present along the polymer backbone influence its hydration and solubility characteristics. JECFA describes konjac flour as a high-molecular-weight glucomannan with a mannose-to-glucose molar ratio within a broad range depending on the material.
Konjac-derived materials can provide substantial viscosity after hydration. Their rheological behavior depends on molecular weight, concentration, acetylation, processing and the specific commercial grade.
Konjac Mannan is commonly associated with CAS Number 37220-17-0. JECFA identifies konjac flour under this CAS number and lists Konjac Mannan, Konjac and Konnyaku among its synonyms.
The principal component is glucomannan, a polymer composed mainly of D-mannose and D-glucose. The polymer is commonly represented approximately as (C6H10O5)n, although the actual structural composition is more accurately described according to its mannose/glucose ratio, molecular-weight distribution and degree of acetylation.
Reported average molecular weights for konjac glucomannan are approximately 200,000–2,000,000, while individual commercial grades can have more specific molecular-weight or viscosity characteristics.
Konjac Mannan should be distinguished from purified Konjac Glucomannan, konjac flour and other modified konjac derivatives because these materials can have different purity levels and technical specifications.
Konjac Mannan can function as a viscosity-controlling, thickening, gelling, binding and film-forming cosmetic ingredient. Its high molecular weight and strong interaction with water allow it to increase the viscosity and body of suitable aqueous formulations.
The polymer can also contribute to a hydrated film on the skin surface and provide a distinctive gel texture. Konjac-derived polysaccharides are particularly useful where formulators are looking for naturally derived hydrocolloid functionality.
Its gelling behavior is influenced by hydration conditions and interactions with other formulation components. Under appropriate alkaline conditions, konjac glucomannan can undergo deacetylation and form stronger, heat-stable gel structures.
Konjac Mannan can be evaluated in a variety of skin-care, personal-care and specialty cosmetic formulations.
Potential applications include facial gels, moisturizing products, masks, creams, lotions, serums and other structured aqueous formulations. Its water-binding and film-forming properties can be considered when developing products focused on hydration and skin feel.
Konjac Mannan can also be combined with other hydrocolloids such as Xanthan Gum, Guar Gum, Locust Bean Gum, Carrageenan, Agar, Agarose and Sodium Alginate. Such combinations can modify viscosity, gel strength, texture and formulation stability.
The selected grade should be matched to the required molecular-weight profile, viscosity, hydration behavior and formulation conditions.
Konjac Mannan should be dispersed carefully to avoid agglomeration and to achieve consistent hydration. Both concentration and processing conditions have a substantial influence on the final viscosity.
JECFA's reference specification describes konjac flour as a high-molecular-weight material and specifies NLT 75% carbohydrate, NMT 15% loss on drying, NMT 5% total ash and NMT 8% protein. These are reference specifications for konjac flour and should not automatically be treated as specifications for every purified cosmetic-grade Konjac Mannan.
A current commercial Konjac Glucomannan reference lists a viscosity of 20,000–40,000 mPa·s at 1% in water at 25°C, with loss on drying NMT 10% and ignition residue NMT 1%. These values are grade-specific, not universal.
The Assay (HPLC) field should not be assigned an arbitrary value. Konjac Mannan is a heterogeneous polysaccharide, and carbohydrate/glucomannan determination is more appropriate than treating the material as a conventional small-molecule HPLC analyte.
Konjac Mannan is a specialty cosmetic ingredient for manufacturers seeking naturally derived hydrocolloid functionality, including viscosity modification, water binding, gelling and film formation.
For B2B sourcing, buyers should evaluate the botanical source, purity, molecular-weight characteristics, viscosity, moisture, ash, protein, pH and microbiological quality.
As a Konjac Mannan Cosmetic Ingredient Manufacturer in India, the ingredient can support bulk cosmetic raw-material requirements for skin-care, personal-care and specialty formulation manufacturers.
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |
| Loss on Drying | NMT 15% |
| Residue on Ignition | NMT 5% |
| pH (1% Solution) | 4.0–7.0 |