Understanding Psyllium Husk Specifications: Swell Volume, Moisture & Extraneous Matter
Demystifying the lab parameters found on a typical Psyllium Certificate of Analysis so your quality assurance team can set realistic purchase criteria.
Reviewing a Certificate of Analysis for Psyllium Husk involves evaluating a set of unique physical and chemical indicators. Understanding these metrics empowers buyers to verify quality with confidence.
Swell Volume (Swelling Index)
Measured in ml/g, swell volume indicates how many milliliters of mucilage 1 gram of husk forms after 24 hours of hydration in water. Higher purity grades deliver superior swell volumes (≥ 40 ml/g for 95%, ≥ 50 ml/g for 98%, and ≥ 60 ml/g for 99%), making it a critical test for functional dosage efficiency.
Moisture Content
Psyllium is intrinsically hygroscopic. Official COA thresholds specify moisture content ≤ 10% for export grades (95%, 98%, 99%) to guarantee microbial stability and prevent lumping during ocean transit.
Total Ash & Acid-Insoluble Ash
Total ash measures the inorganic residue left after incineration. Acid-insoluble ash specifically quantifies silica and mineral sand particles. A low acid-insoluble ash reading (typically < 0.2%–0.3%) verifies thorough mechanical de-sanding and washing.
Procurement Summary
At Seabird EXIM, we review technical specifications upfront with international buyers to ensure every parameter matches your internal QA protocols.
Consult Our Sourcing Desk on This Topic
Have questions about grade selection, swell volume verification, or export packaging? Connect directly with our trade team in Surat.
Related Buyer Guides
How to Choose the Right Psyllium Husk Purity for Your Formulation
A technical buyer guide breaking down the practical differences between 85%, 90%, 95%, 98%, and 99% purity grades in terms of swell volume, color, and cost.
What Should International Buyers Check Before Importing Psyllium Husk from India?
An essential checklist for overseas procurement managers evaluating Indian export partners, lot documentation, container loading protocols, and destination compliance.