Specifications:
Appearance: Yellow-brown granular
Tannins content: ≥50.0%
Source: Natural extracts, hydrolyzable tannins extracted from Chinese gallnut.

Specifications: 1000ppm, 2000ppm, 3000ppm, 5000ppm
Characteristics: Red brown powder or granular. Uniform colour and luster, 
no deterioration, no lump, no bad smell.
Strain used: Saccharomyces cerevisiae.