MAGNAPHOS® PLATE Magnesium Phosphide

Stored product insects (all life stages): granary weevil, rice weevil, maize weevil, lesser grain borer, Indian meal moth, red flour beetle, saw-toothed grain beetle, Khapra beetle, Angoumois grain moth, Mediterranean flour moth, confused flour beetle, flat grain beetle, and many others.

Structures and settings: Railcars, containers, trucks, vans and other transport vehicles, tarpaulin and bunker fumigations, small sealable enclosures, mills, food processing plants, warehouses, shipholds, and barges.

Raw agricultural commodities and animal feed: Wheat, corn, barley, oats, rice, sorghum, soybeans, peanuts, cottonseed, various nuts and seeds, and animal feed and feed ingredients.

Processed foods: Cereal flours, bakery mixes, pasta, crackers, processed cereals, chocolate products, dried fruits, processed nuts, dried milk, processed spices and seasonings, malt, and others as listed on the label.

Nonfood commodities: Natural fibers and cloth, leather, tobacco, wood and wood products, paper, dried plants and flowers, straw, psyllium seed and husks, and others as listed.

MAGNAPHOS® PLATE is a federally classified DANGER product. Phosphine gas is fatal if inhaled and fatal if swallowed. This product must be treated as lethal at all times.

OSHA hazard classifications:

• Acute toxicity – Inhalation (Gas/Vapor): Category 1 — Fatal if inhaled
• Acute toxicity – Oral: Category 2 — Fatal if swallowed
• Acute toxicity – Dermal: Harmful in contact with skin
• Water reactivity: Category 1 — Contact with water releases flammable phosphine gas

NFPA ratings: Health 4 (Severe) | Flammability 2 | Instability 0 | Special: W (water reactive)

Important distinction from aluminum phosphide: Magnesium phosphide is significantly more reactive than aluminum phosphide and will generate gas more rapidly, especially in the presence of liquid water and at elevated temperatures. Wet deactivation of partially spent or unreacted plates must be performed with extreme caution and in strict accordance with label procedures.

Odor is not a reliable indicator of safety. Pure phosphine is odorless. A faint garlic odor may be detectable due to trace contaminants, but the absence of any odor does not mean phosphine is absent. Gas detection equipment is required — never rely on smell alone.

Fire and explosion: Phosphine may ignite spontaneously above its lower flammable limit of 1.8% v/v. Explosive concentrations must never be allowed to accumulate. Spent or partially spent plates must never be confined, as continued gas release can create an explosive atmosphere. Never use water to extinguish a fire involving this product.

Corrosion hazard: Phosphine corrodes copper, brass, gold, silver, and related alloys — particularly at elevated temperatures and humidity. Smoke detectors, brass sprinkler heads, electronic equipment, batteries, and communication devices must be removed or protected before any fumigation.

Plate retrieval required: Unlike pellets or tablets applied directly to bulk commodities, MAGNAPHOS® PLATE must be retrieved after fumigation and properly deactivated or disposed of per label instructions.

• Restricted Use Pesticide due to the high acute inhalation toxicity of phosphine gas
• Legal for sale only to dealers and Certified Applicators; use only by Certified Applicators or persons under their direct supervision
• A written Fumigation Management Plan (FMP) is required prior to every treatment
• At least two trained persons must be present during any fumigation requiring entry into the structure
• A Certified Applicator must be physically present during fumigant application and during the initial opening of the structure for aeration
• All fumigated structures must be placarded at every entrance until phosphine levels are confirmed at or below 0.3 ppm
• Strictly prohibited within 100 feet of any building where humans or domestic animals reside, including single and multi-family residential properties, nursing homes, schools (except athletic fields), daycare facilities, and hospitals

Phosphine exposure limits:

• 8-hour TWA: 0.3 ppm
• 15-minute STEL: 1.0 ppm

Respiratory protection requirements:

• Known concentrations up to 15 ppm: NIOSH-approved full-face air-purifying respirator with approved phosphine canister
• Concentrations above 15 ppm or unknown: NIOSH-approved SCBA required

Store in a dry, well-ventilated area under lock and key. Do not store where temperatures may exceed 130°F. Do not store in any building where humans or domestic animals reside. Keep containers sealed at all times to prevent moisture contact. Storage area must be posted as a pesticide storage area.

Chemical emergency (spill, fire, exposure): CHEMTREC — 1-800-424-9300 (24 hrs) Medical emergency: Rocky Mountain Poison and Drug Safety — 1-866-673-6671 (24 hrs) Product questions: UPL NA Inc. — 1-800-438-6071

Magnaphos Plate Label

Magnaphos Plate SDS