Cryotech CF7®

Liquid Potassium Acetate Deicer for Automated Systems used on Bridges, Ramps, and Highway structures.

Description of CF7

Cryotech CF7® is a potassium acetate based liquid deicer containing no chlorides. It is safer for structural steel and reinforcing steel embedded in concrete and readily biodegrades with little environmental impact. CF7 has a freezing point of -60°C (-76°F), and is effective at temperatures of -26°C (-15°F) and below.

Please see the CF7 Fact Sheet for a brief summary
of CF7's benefits, application information, and product specifications.

Cryotech CF7® offers these advantages:

*    Low Corrosion -- Contains no chlorides
*    High Performance -- Effective to -26°C (-15°F) and below
*    Safe for the Environment -- Non-persistent and biodegradable
*    Dual Purpose -- For prewetting solids or direct application
*    Safe to Use -- Low toxicity to humans and aquatic organisms
*    Easy to Handle -- A clear liquid, no agitation required
*    Lasts Longer -- Requires fewer applications

CF7 is an offshoot of Cryotech's runway deicing business. For both environmental and performance reasons, common glycol- and urea-based deicers are rapidly being replaced by Cryotech's E36® liquid runway deicer. The U.S. Environmental Protection Agency has publicly urged airports to consider the advantages of converting to E36.

Based on the characteristics of CF7, and on the best information available to Cryotech, CF7 is neither listed as a hazardous waste, nor does it exhibit any
of the characteristics that would cause it to be classified or disposed of as a RCRA hazardous
waste. For this and other reasons, CF7 may be considered an important tool in managing environmental issues associated with storm water run-off.

Customer Profile

Zilwaukee Bridge, Saginaw, MI The Zilwaukee Bridge is chloride-free. Since completion in 1988, CMA® and CF7 have been the only chemical
deicers used on the Zilwaukee Bridge. To date, there is no evidence of chloride-induced corrosion.

Environmental Impact

Tests with CF7 show it readily biodegrades at low temperatures and has a relatively low oxygen demand (BOD) when compared to glycol-based deicers. Toxicity tests rate CF7 "relatively harmless" to aquatic life, the most favorable classification used by the environmental community. And the fluid does not contain nitrogen. Therefore, CF7 is considered much safer for the environment than either glycol or urea.

As suggested by federal agencies, the following general summary of environmental and hazard information is provided. More detail is available in the MSDS. Complete test report documentation is available upon request.

Hazard Information

*    Hazardous Waste & Shipping
The RCRA regulations define hazardous waste in two ways: a listed hazardous waste or a characteristic hazardous waste. CF7 is not a listed hazardous waste. A waste may be considered hazardous if it exhibits any one of four characteristics - Corrosivity, toxicity, ignitability,
or reactivity. A waste is corrosive under RCRA if it has a pH less than or equal to 2.0 or greater than or equal to 12.5. CF7 is not RCRA corrosive, toxic, ignitable or reactive; therefore, it is not a characteristic hazardous waste.

*    No Hazardous Components
CF7 contains no hazardous components as described by SARA Title III, Section 302. Nor is CF7 designated as a hazardous chemical by the
U.S. Department of Transportation. CF7 does not contain nitrates.

*    Spill Handling Procedures
CF7 is not expected to present environmental problems. If product should spill, it should be absorbed and the resulting waste disposed of in a sanitary landfill unless state or local regulations prohibit such disposal.

*    Container and Product Disposal
Based on information available to Cryotech Deicing Technology, CF7 is neither listed as a hazardous waste, nor does it exhibit any of the characteristics that would cause it to be classified or disposed of as a RCRA hazardous waste. Empty containers and product unsuitable for normal deicing operations may be disposed of in a sanitary landfill unless state or local regulations prohibit such disposal.

Standard Shipments

CF7 is shipped to customers in the following units:

*    Rail Tank Cars.....18,000 gallons (68,000 liters)
*    Tank Trucks.....4,400 gallons (16,600 liters)
*    Isotanks.....4,000 gallons
(15,000 liters)

*    Totes.....265 gallons
(1,000 liters)

*    Drums.....55 gallons
(200 liters)

Product Specifications

*    Composition -- 50% minimum potassium acetate plus corrosion inhibitors, by weight
*    Appearance -- Clear, colorless, mobile liquid, free from matter in suspension
*    Density -- 1.28 gm/cm3 (10.7 lb/gal) @ 20°C (68°F)
*    Viscosity -- 10 cp maximum @ 20°C (68°F) and 20 cp maximum @ 0°C (32°F)
*    Flash Point -- Nonflammable
*    Freezing Point -- -60°C (-76°F)
*    Miscibility With Water -- Complete
*    Storage -- No special storage required (do not
use galvanized materials)
*    Typical pH -- 11.0 ±0.5
*    Specific Gravity -- 1.25 - 1.30 at 20°C
*    Packaging --55 gallon drum; 265 gallon totes, bulk
Minimum orders: 4 drums, 1 tote, 4400 gallons bulk

Application Rates


CF7 is most effective when applied uniformly to pavement surface before freezing precipitation. Prompt mechanical removal of snow and ice is necessary reduce fluid dilution. Additional applications may be necessary if snow and ice begin to bond to the surface.

*    Apply.....0.5 gallons/1000 f∑ (25 g/m∑)


CF7 is an effective deicer when applied in an even film or in bands on 4-6 inch (10-15 cm) centers.
The deicer penetrates to the pavement surface and breaks the bond of ice and snow prior to mechanical removal. Banding reduces dilution from melting
and allows the fluid to penetrate. The amount of deicer needed varies with temperature and thickness of snow or ice, but should be in the following ranges.

*    Apply on thin ice.....1.0 gallon/1000 f∑ (50 g/m∑)
*    Apply on 1" (2.5 cm) ice.....3.0 gallons/1000 f∑ (150 g/m∑)


CF7 will speed the effect of solid deicers and abrasives. CF7 is applied at the spreader outlet, typically for pre wetting rates of 5% to 15% by weight of solid material.

*    Apply.....1.25 gallons per 100 lbs of deicer or sand (130 g/kg of deicer or sand)

Storage and Transport

The formulation of CF7 contains an inhibitor package designed to protect several metal alloys from accelerated corrosion and deterioration (e.g., cracking). The inhibitor package consists of fully dissolved compounds which, when exposed to metal alloys such as plain carbon or low alloy steels, will form a barrier on the alloy surface to prevent accelerated corrosion.

To maintain the full effectiveness of the inhibitor package Cryotech recommends shipping and storage of CF7 in non-metal containers such as polyethylene. In cases where this is not possible, shipment and storage can be accomplished with carbon, low alloy, or stainless steel containers. Storage and shipment containers should be strong enough to hold 10.68 lbs. per gallon of CF7, which is 28% heavier than water.

Shipping and storage in carbon or low alloy steel containers does not represent a major concern. However, the customer must be aware that this may result in depletion of the inhibitor concentration. The amount of depletion will depend on material composition, surface condition, and surface area.

When shipment or storage in carbon or low alloy containers is necessary, the container must be clean and free of rust and surface deposits. Rust and surface deposits (or scale) may become dislodged or dissolved and result in fluid degradation and discoloration. Additionally, tanks or containers which have been used for other materials must be drained and, at a minimum, rinsed, to remove the material before introducing CF7.

Note: Residue of chloride based deicer (especially CaCl2 and MgCl2) must be removed prior to filling. Avoid galvanized materials in piping and storage systems. Potassium acetate is known to have a relatively slow reaction with zinc-coated materials. This is not an issue for roadway appurtenances where exposure time is limited.

Sampling Procedure

Reference the suggested sampling procedure prior to sending a sample to Cryotech's Quality Assurance Lab.

Maintenance Dispensing Equipment

*    External surfaces of equipment used to dispense CF7 should be routinely rinsed with warm water or a high-pressure wash to prevent buildup of the fluid and other contaminants associated with winter maintenance operations. A thorough high-pressure washing with warm soapy water is recommended as equipment is removed from service after the deicing season.
*    Diluted CF7 biodegrades naturally when exposed to air and other contaminants. This process quickens in warmer temperatures. Frequent rinsings will prevent any buildup that could result in formations
of unsightly biological growth and superficial staining and pitting of some material.
*    Undiluted CF7 kept in closed containers with minimal exposure to air does not degrade and may be stored indefinitely.

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