Psyllium husk specifications can vary depending on the grade, purity, and intended use. Below are some common specifications used in the food, pharmaceutical, and industrial sectors:

Physical Properties:

Appearance: Light brown to off-white, fibrous husk

Odor: Odorless or slightly characteristic

Taste: Bland

Mesh Size:

40 Mesh (Coarse)

60 Mesh (Regular)

80 Mesh (Fine)

Moisture Content: Max 8-12%

Swelling Index: 40-70 ml/g (depends on purity)

Bulk Density: 0.45 - 0.65 g/ml

Chemical Properties:

Purity:

85% (Industrial Grade)

95% (Commercial Grade)

98% (Pharmaceutical/Food Grade)

pH (1% solution): 4.0 - 8.0

Ash Content: Max 4%

Protein Content: 2-5%

Total Dietary Fiber: 70-80%

Heavy Metals: Below permissible limits

Microbiological Standards:

Total Plate Count: Max 50,000 CFU/g

Yeast & Mold: Max 100 CFU/g

E. Coli: Absent

Salmonella: Absent

Coliforms: <10 CFU/g