Description

Monopotassium phosphite is a highly effective source of phosphorus and potassium in a phosphonate form, offering superior systemic activity for plant health and nutrition. This compound is valued for its dual role as a fertilizer and a fungistat, providing a proactive defense mechanism against various plant pathogens. It is a critical raw material for manufacturers of high-performance agricultural chemicals, water treatment formulations, and specialty flame retardants, serving the needs of the agrochemical, industrial, and polymer industries globally.

Application

• Agricultural Fungicide & Fertilizer: A key component in foliar sprays and fertigation systems to control diseases like downy mildew and phytophthora while supplying phosphorus and potassium nutrients.
• Water Treatment Agent: Used as a corrosion and scale inhibitor in industrial cooling water and boiler water systems.
• Flame Retardant Synergist: Employed in the formulation of intumescent coatings and certain polymer systems to enhance fire resistance.
• Chemical Intermediate: Serves as a precursor in the synthesis of other phosphite salts and organophosphorus compounds.
• Nutrient Supplement in Hydroponics: Provides a readily available source of P and K in controlled environment agriculture.
• Wood Preservative Formulations: Acts as a fungicidal component in treatments to protect timber from fungal decay.

Basic Information

Product Name	Monopotassium Phosphite
CAS No.	13977-65-6
Molecular Formula	KH2PO3
Molecular Weight	120.09 g/mol
Synonyms	Potassium Dihydrogen Phosphite; Potassium Phosphonate; Phosphorous Acid, Monopotassium Salt; Mono-Potassium Phosphite; KH2PO3; Potassium Acid Phosphite; Fosfitopotásico (Spanish); Phosphite de monopotassium (French)
EINECS	237-777-7

Quality Control

Our Monopotassium Phosphite is manufactured under a stringent quality management system. Every batch is tested to ensure it meets precise chemical and physical specifications, including assay, impurity profiles, and solubility. Certificates of Analysis (COA) documenting these results are provided to guarantee traceability, consistency, and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in original packaging away from moisture to prevent caking and degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (KH2PO3)	≥ 98.0 %
pH (1% Solution)	3.5 - 5.5
Water Insolubles	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.