Product Name: Phosphite 1500
Synonyms: Phosphorous acid, Monopotassium phosphite, Potassium phosphite solution
Recommended Use: Agricultural fungicide, fertilizer additive
Manufacturer: Contact details for manufacturer include address, telephone number, and email for safety inquiries
Emergency Telephone Number: Local poison control center, emergency response number for manufacturer
GHS Classification: Corrosive to skin, serious eye damage, harmful if swallowed
Pictograms/Symbols: Corrosive (test tube on hand and metal), Exclamation mark for irritation
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage, harmful if swallowed, may cause respiratory irritation
Precautionary Statements—Prevention: Wear protective gloves, protective clothing, eye and face protection, wash hands thoroughly after handling, avoid breathing vapors or mists, do not eat, drink, or smoke during use
Precautionary Statements—Response: If on skin, wash with plenty of water, remove contaminated clothing, rinse skin immediately. If in eyes, rinse cautiously with water for several minutes and seek medical advice. If swallowed, rinse mouth and do not induce vomiting. If inhaled, move person to fresh air and get medical attention if symptoms develop
Main Ingredient: Potassium phosphite (K₂HPO₃), typically 45–55% by weight in solution
Chemical Formula: K₂HPO₃
CAS Number: 13492-26-7
Other Ingredients: Water (balance), possible stabilizers or anticaking agents (small amounts, nonhazardous)
Impurities: May contain trace amounts of phosphoric acid and related salts, depending on production quality control
Inhalation: Remove from exposed area to fresh air. Give oxygen if breathing is difficult. Seek medical attention for continued discomfort, irritation or symptoms
Skin Contact: Remove contaminated clothing and shoes. Rinse skin immediately with plenty of water for at least 15 minutes. Use emergency shower if available. Seek medical attention if irritation or burning occurs
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes, lifting upper and lower eyelids occasionally. Remove contact lenses if present and possible. Seek urgent medical attention
Ingestion: Rinse mouth thoroughly, but do not induce vomiting. Offer water to dilute chemical. Never give anything by mouth to an unconscious person. Get medical attention immediately
Most Important Symptoms and Effects (Acute and Delayed): Severe eye and skin irritation, possible burning sensation, nausea, vomiting if swallowed, respiratory distress if inhaled
Suitable Extinguishing Media: Water spray, dry chemical, foam, or carbon dioxide
Unsuitable Extinguishing Media: Avoid high pressure water streams that may spread chemical
Specific Hazards: May produce toxic phosphorus oxides and potassium oxides on decomposition
Protective Equipment for Firefighters: Wear self-contained breathing apparatus (SCBA) and protective suit
Special Fire-Fighting Procedures: Move containers from fire area if safe. Cool exposed containers with water spray. Prevent runoff to water systems and sewers
Personal Precautions: Wear chemical-resistant gloves, eye and face protection, and cover all exposed skin. Avoid breathing dust or mist. Evacuate area if spill is large or if fumes are present
Environmental Precautions: Prevent entry to drains, waterways, or soil. Notify relevant authorities if contamination occurs
Spill Cleanup Methods: Contain spilled material with absorbent (sand, earth, vermiculite). Shovel up into labeled containers for disposal. Neutralize residues with dilute alkaline solution. Ventilate area and wash spill site after material pick-up is complete
Handling: Use only in well-ventilated areas. Handle with care to avoid spills and splashes. Wear PPE suitable for corrosive chemicals. Wash hands before eating, smoking, or using restroom
Storage: Store in original, tightly closed containers. Keep in cool, dry, well-ventilated area, away from incompatible substances including acids and oxidizers. Prevent container damage. Store away from food and animal feed. Keep out of reach of children and unauthorized personnel
Engineering Controls: Use local exhaust ventilation or other engineering controls to avoid inhalation exposure. Use closed process systems wherever possible
Personal Protective Equipment (PPE): Chemical-resistant gloves (nitrile, neoprene), protective goggles or face shield, lab coat or chemical apron, closed-toe footwear
Respiratory Protection: Use NIOSH-approved respirator for mist or if ventilation is inadequate
Exposure Limits: No established occupational exposure limits for potassium phosphite; minimize exposure as a corrosive compound
Hygiene Measures: Wash hands, forearms, and face thoroughly after handling. Change contaminated clothing immediately
Physical State: Liquid solution (or crystalline solid in pure form)
Color: Clear to pale-yellow
Odor: Odorless or slightly pungent
pH: 5.8–6.5 (if in solution)
Melting/Freezing Point: Not applicable for solution; pure solid decomposes before melting
Boiling Point/Range: Above 100°C (solution boils as water boils off)
Solubility: Miscible in water
Density: 1.37–1.45 g/cm³ (solution, depends on concentration)
Vapor Pressure: Not significant
Partition Coefficient: Not applicable
Other Data: Not flammable, not explosive, non-volatile under normal conditions
Chemical Stability: Stable under normal storage and handling conditions
Conditions to Avoid: Excessive heat, open flame, contact with strong acids and oxidizers
Incompatible Materials: Acids, strong oxidizers, alkalis (may release toxic gases), metals such as aluminum and zinc (may produce hydrogen gas)
Hazardous Decomposition Products: Toxic phosphorus oxides, potassium oxides, phosphine gas in extreme cases
Polymerization: Will not occur
Acute Toxicity: Low acute oral and dermal toxicity; corrosive to skin and eyes. Ingestion can result in nausea, vomiting, gastrointestinal burns
Skin Corrosion/Irritation: Causes severe burns, may cause permanent damage
Eye Damage/Irritation: Risk of serious eye damage; can lead to blindness
Inhalation: Can irritate respiratory system if mist or vapor is inhaled
Chronic Effects: Prolonged or repeated exposure may cause dermatitis or other skin issues
Carcinogenicity: No components listed as carcinogens by IARC, NTP, or OSHA
Mutagenicity/Reproductive Toxicity: Not known to be mutagenic or reproductive toxin
Other Data: Symptoms arise mainly from corrosive action
Ecotoxicity: Can be harmful to aquatic life in high concentrations; phosphorus compounds promote algal blooms, affecting aquatic ecosystems
Persistence and Degradability: Inorganic, will not degrade by microbial action; can lead to nutrient overload in water systems
Bioaccumulation Potential: Not expected to bioaccumulate
Mobility in Soil: Moves readily in water, may leach into groundwater depending on soil structure
Other Adverse Effects: Phosphite ions can affect plant physiology at certain concentrations; avoid large accidental discharges to natural waters
Disposal Methods: Dispose of in accordance with local, regional, and national regulations. Avoid discharge to sewer or environment
Waste Treatment: Neutralize corrosive liquid before disposal. Solid residues to be buried in approved landfill if permitted. Use licensed chemical waste disposal contractor for offsite handling
Containers: Triple rinse containers, puncture or crush prior to landfill, or return to supplier for recycling where systems exist
Local Restrictions: Regulations may vary; always check with environmental authorities before disposal
UN Number: UN3265
Shipping Name: Corrosive liquid, acidic, organic, n.o.s. (Potassium phosphite solution)
Transport Hazard Class: 8 (Corrosive substances)
Packing Group: III
Labeling Requirements: Corrosive label and text identification
Special Precautions: Keep container upright, handle with care, use spill trays in transport vehicles, emergency spill procedures in place
TSCA: Listed on US Toxic Substances Control Act inventory
OSHA: Regulated as corrosive chemical workplace hazard
SARA Title III: Not listed under Section 302, 304, or 313 for reportable quantities, but report large spills to relevant authorities
REACH (EU): Compliant as inorganic salt; check local registration status
Other Regulations: Subject to labeling, transport, packaging, and worker protection standards under national and local legislation. Users must follow safety protocols set by local and global regulatory bodies for storage, use, and disposal; documentation must be available for inspection at using facility
