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STA-FORM 60® - INSOL-U-25® Urea-Formaldehyde Concentrates

INSOL-U-25® and STA-FORM 60® urea-formaldehyde concentrates (UFC) are clear, viscous liquids consisting of formaldehyde (HCHO), urea, and a small amount of water. Sometimes referred to generally as UFC85 or UFC-85, they provide some of the highest concentrations of formaldehyde commercially available in an easy-to-use form.

Potential benefits of INSOL-U-25 and STA-FORM 60 UFC include:

  • Longer storage stability in contrast to conventional aqueous formaldehyde solutions.
  • Can be stored at ambient temperatures.
  • Convenient source of both urea and formaldehyde since active components are already in liquid form.
  • Less storage space required since urea and formaldehyde are combined and do not require separate storage tanks
  • Reduced cycle times since part of the combination reaction between urea and formaldehyde has already occurred and only one material is metered to the process.

INSOL-U-25 and STA-FORM 60 UFC can be used in many applications where urea and formaldehyde are required ingredients. A major application for UFC85 products is as a precursor in the manufacture of liquid and dry nitrogen-based lawn and shrub fertilizers. Another major use for these products is in the preparation of urea-formaldehyde resins for wood product adhesives.


Medium Density Fiberboard (MDF), UF Concentrate

Product Composition

Urea-formaldehyde and a small amount of water


Clear viscous liquid when shipped

Typical Properties
Formaldehyde, wt. %
60.0 ± 0.5
Urea, wt. %
25.0 ± 0.5
Active Materials, weight %
85.0 ± 1.0
Viscosity, cps
Color, APHA
10 maximum
Specific Gravity at 25°C
1.325 ± 0.005
Weight per Gallon, lb.
11.0 (average)
Specific Heat at 45°C, cal/g
Electrical Conductivity at 26°C, mho
Congealing Point, °F
Below -14
Boiling Point, °F
Solubility in 100 grams UFC at 25°C
15 grams
81 grams
Vapor Pressure, mm Hg (Torr)
At 25°C
At 39°C
At 49°C
At 62°C


INSOL-U-25 and STA-FORM 60 UFC are shipped at a temperature between 77°F and 95°F in stainless steel tank trucks and in 20,000-gallon insulated resin-lined cars.

Storage and Handling

UFC contains formaldehyde which has a strong odor and at high levels can cause irritation of the eyes, skin, nose and throat. Do not get in eyes, on skin, or on clothing. Avoid prolonged or repeated skin contact. Wash thoroughly with soap and water after handling. Launder contaminated clothing before reuse. Discard contaminated shoes. Avoid prolonged or repeated breathing of vapor or mist of any UFC85. Keep containers closed when not in use. Use only in well-ventilated areas.

Additional information on the safe handling of UFC85 is in the Safety Data Sheet available from Georgia-Pacific Chemicals.

Unloading and transfer

Tank cars and tank trucks must be unloaded by pump. In accordance with OSHA regulations, unloading by air pressure is not permitted.

For truck unloading, the driver will hook up the transfer hoses to the truck and open the outlet valve. Plant personnel are responsible for making proper connections to the plant unloading line as well as the operation of all pumps and valves in the lines to the storage tank.

Since the viscosity of the product increases with lower temperatures, it is recommended that the concentrate be kept warm during transit for ease in unloading. In climates where low temperatures are likely, transfer lines to storage should be insulated and heat-traced or steam-traced. This helps to maintain product flow during transfer and helps to prevent the lines from plugging.

Once the lines are warm, the heat source should be cut off so that the product is not overheated. High viscosities created from short periods of cooling can be reversed by warming with agitation to recommended temperatures.


The pH of UFC gradually drops when stored at room temperature (See Product Information Bulletin) and process adjustments may be necessary.

UFC should be stored in well-ventilated areas away from strong acids and oxidizing and alkaline materials. Storage tanks of aluminum, resin-lined mild steel, or stainless steel are recommended. Since some contamination can occur with prolonged storage in aluminum or resin-lined mild steel, storage tanks of stainless steel may be preferred. UFC has been found generally to be less corrosive than aqueous formaldehyde solutions.

Indoor storage is recommended. Outdoor storage tanks should be shielded from the direct rays of the sun to maintain temperatures below 95oF. If outside storage is necessary, or if low indoor temperatures are expected, insulated storage and some means of heating the tank, such as inside heating coils, should be considered. Hot water (127°F) is preferable to steam for heating.

Product Douments

* Can be adjusted to meet specific needs.

The information and technical data herein is believed to be accurate. It is offered for your consideration, investigation and verification. Buyer assumes all risk of use, storage and handling of the product. NO WARRANTY, EXPRESS OR IMPLIED, IS MADE INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY EXCLUDED. Nothing contained herein shall be construed as a license to operate under or recommendation to infringe any patents.

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