T/BYXT 077-2024 High-purity Montmorillonite Powder

Scope

Scope: This document specifies the term definitions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and sales and service requirements for high-purity montmorillonite powder. This document is applicable to high-purity montmorillonite powder used in cosmetics, pharmaceuticals, veterinary drugs, and feed breeding, etc. Main technical content: Physical and chemical requirements shall comply with the requirements of Table 1. **Table 1: Specifications** **Item** **Standard** **Superior Grade** **First Grade** **Montmorillonite Content (%)** ≥99.0 ≥95.0 ≥90.0 **Ammonia Absorption Value (mmol/100g)** ≥100 ≥90 ≥80 **Blue Absorption Value (g/100g)** ≥50.0 ≥44.0 ≥37.0 **Particle Size (Mesh)** ≥1000–900 ≥700–500 ≥300–200 **Particle Size Distribution (D90)** ≤15 ≤20 **Dry Loss (Mass Fraction)** ≤6.0 ≤10.0 **Water-Soluble Matter (%)** ≤0.5 ≤0.7 **pH Value** 5.0–9.0 **Main Components** Silica (SiO2) (%) ≥65.0 ≥55.0 Alumina (Al2O3) (%) ≥25.0 ≥12.0 **Heavy Metal Limits** Arsenic (As) (mg/kg) ≤2.0 ≤5.0 Mercury (Hg) (mg/kg) ≤1.0 ≤1.0 Lead (Pb) (mg/kg) ≤3.0 ≤5.0 **Hygiene Requirements** Total Mold and Yeast Count (CFU/g) ≤100 Escherichia coli Not detected Pseudomonas aeruginosa Not detected

Development Information

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