Ammonium Polyborate in White Crystalline Powder Form is used as micronutrient fertilizer. Ammonium Polyborate is available in white crystalline powder form. Ammonium Polyborate maintains a pH of 7.3-8.5 and is soluble in water. Ammonium Polyborate in White Crystalline Powder Form is packed in 25kgs HDPE bags with additional liner to protect against moisture.