Entada rheedei

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Common products:
- Seed gum: a water‑soluble polysaccharide gum extracted from the mature seeds of Entada rheedei. The gum is obtained by soaking the seeds, grinding, filtration, and spray‑drying to a fine powder.

Industrial and craft applications:
- Natural binder and thickener for paper and board coatings, where it imparts a smooth surface and improves printability. In textile manufacturing it serves as a sizing agent for warp yarns, reducing breakage during weaving. The saponin‑rich seed flour is used as a mild surfactant in liquid detergents, providing foaming and emulsifying action without synthetic chemicals.

Food and beverages (non‑medicinal):
- Evaluated as a functional ingredient for thickening and stabilizing dairy beverages, fruit juices and bakery batters. Its high molecular weight gives aqueous solutions viscosities of 1500–2500 cP at 1 % (w/v) at 25 °C, allowing reduced use of conventional hydrocolloids while maintaining texture. The gum forms stable emulsions in oil‑in‑water systems, useful for salad dressings and sauces, and provides moisture retention in baked goods, extending shelf‑life.

Properties relevant to use:
- Polysaccharide composition (≈85 % carbohydrates, 3 % protein, 1 % ash) with a high degree of branching. Viscosity‑pH profile remains stable between pH 5 and 9, with minimal degradation up to 80 °C. Film‑forming ability yields transparent, flexible films with tensile strength of 30–45 MPa when cast from 2 % solutions. Low microbial load due to inherent saponins, enhancing preservative effect.

Standards and regulation:
- As a plant‑derived gum intended for food and non‑food applications, it is subject to general food additive regulations (e.g., U.S. FDA 21 CFR 184, EU Regulation 1333/2008) and to industrial polymer safety guidelines (e.g., REACH). No specific ISO/ASTM standard exists for Entada rheedei gum, but its compliance with the European Pharmacopeia monograph for “Plant gums” (e.g., low heavy‑metal limits

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