Items with this mark may be considered hazardous under some shipping conditions.
If necessary, we will change your selected shipping method to accomodate these items.
A product of decomposed plant material, tannin occurs in natural waters and is used for boiler and cooling tower water treatment, dyeing, ink manufacture, tanning, and paper sizing. Lignin, also a plant product, is found in paper pulp manufacturing waste. Tannin and lignin are analyzed together and reported as mg/L tannic acid. This kit utilizes the simple, low-cost color disc method - the most accurate visual test kit method.
Items with this mark may be considered hazardous under some shipping conditions.
If necessary, we will change your selected shipping method to accomodate these items.