PHOS-CHEK WD881A

PHOS-CHEK WD881A is a foam-forming water additive designed for use on Class A fires – those defined by the National Fire Protection Association (NFPA) as fires in ordinary combustible materials such as wood, cloth, paper, rubber, and many plastics. It is composed of a mixture of surfactants and other performance components dissolved in a water miscible system. When the concentrate is diluted with water, it produces an excellent “wet water” which then forms a stable foam when mixed with air.

PHOS-CHEK WD881A concentrate is mixed with water at exceptionally low concentrations (0.1 to 1.0% by volume) to prepare solutions. For example, 0.3 gallons of WD881A concentrate is mixed with 99.7 gallons of water to prepare a 0.3% solution. Also, for example, a use concentration of 0.5% is prepared by mixing 0.5 gallon of concentrate with 99.5 gallons of water. This solution is then mixed with air to form the firefighting foam that is subsequently applied to the burning or endangered fuels.

PHOS-CHEK WD881A has been extensively tested and has met the recognized criteria for being classified as biodegradable in water systems. Testing has been conducted using three different types of measurements of biodegradability.

The acute toxicity of PHOS-CHEK WD881A concentrate and its solutions has been extensively tested. Acute toxicity refers to the effect of short-term exposure such as a single contact or ingestion. These tests revealed that the concentrated product is practically non-toxic at even the highest anticipated levels of exposure.

Please consult with your regulatory expert to understand the restrictions and regulations that may be applicable to your state or locality with regards to the sale and distribution of Class A foam concentrates.

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