BIOTREND® CTL 98-P is a highly effective fungicide. It is used for effective mildew control in dry paint film and to protect industrial products from fungal growth.

Chemical Family: Chloronitriles

Labeling Claims: Formaldehyde releasing substances-free, Formaldehyde-free, Heavy Metal-free, High Purity, Non-Phenolic

Applicable Processes: Leather Manufacturing, Textiles Manufacturing

Synonyms: 1,3-Dicyanotetrachlorobenzene, 2,4,5,6-Tetrachloro-3-cyanobenzonitrile, m-Tetrachlorophthalonitrile, Meta-Tetrachlorophthalodinitrile, Tetrachloroisophthalodinitrile, Tetrachloroisophthalonitrile, TPN

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Identification & Functionality

Features & Benefits

Labeling Claims
Agrochemicals Features
CASE Ingredients Features
Industrial Additives Features
Materials Features
Product Features
  • Broad spectrum fungicide effective for mold prevention and sap-stain control
  • Highly effective fungicide for control of fungi in wide ranging industrial applications
  • Suitable for use in high quality paints & coatings
  • Free from formaldehyde, formaldehyde releasers, phenolics, heavy metals
  • Excellent thermal stability and shelf stability
  • Effective over wide pH range (1-10)
  • Easy to use liquid formulation
  • EPA registered for use in and around homes
  • Highly resistant to leaching (low water solubility)
  • Extensive regulatory portfolio
  • Cost effective use levels: 0.5% to 2.0%
  • Compatible with zinc oxide in latex paints and most in-can preservatives

Applications & Uses

Applicable Processes
Compatible Substrates & Surfaces
Coating End Applications
Industrial Additives End Use
Use Level
5.0 - 10.0 Ibs/100 gallons (Exterior), 2.5 - 5.0 Ibs/100 gallons (Interior)
Product Applications
  • Chlorothalonil is one of the most important fungicidal chemicals in the world. This extremely versatile compound is widely used in agriculture (where it protects crops against the ravages of fungal plant diseases), and also for the protection of paints and coatings, wood and wood composite products, adhesives, grouts, and caulks/sealants to protect against biodeterioration caused by a wide range of fungi.
  • Biotrend® CTL98-P is registered by the United States Environmental Protection Agency (EPA) for the protection of the following applications: latex emulsion paints, stains, and coatings, solvent-based exterior coatings, adhesives, caulks and sealants, grouts, and composite wood products (including wood-thermoplastic composites (WPC’s).


Physical Form
Micro milled powder - white
Slight pungent odor
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Active Contentmin. 98%-
Molecular Weight265.9--
Specific Gravity1.8--
Melting Point250 - 251°C-
Boiling Point (Decomposes)min. 350°C-
pH StabilityHydrolyzes in strong alkaline media--

Chlorothalonil may not be compatible with all formulation components. Before commercial use and introduction, formulations incorporating Biotrend® CTL products should be fully evaluated for efficacy, compatibility, and stability. In general, Biotrend® CTL products should be incorporated near the end of the manufacturing cycle. Incompatibility may be indicated by loss of efficacy, color changes, changes in viscosity and/or pH, and reduced storage stability. Under certain conditions, the use of chlorothalonil may contribute to the chalking of dark-colored paints. In paints and coatings, color stability should be checked using both heat-aging and real-life exposure conditions.

Light Stability

Chlorothalonil is stable to ultraviolet radiation in aqueous media and in the crystalline state.

Regulatory & Compliance

Certifications & Compliance
Chemical Inventories

Safety & Health

Safety Information

BIOTREND® CTL 98-P carries the DANGER signal word because of its inhalation toxicity and potential to cause severe eye irritation. When handling these products, avoid contact with the skin, eyes, and clothing. Wear goggles or a face shield, protective clothing, and waterproof gloves, as specified on the EPA product labels, when handling these products.

Packaging & Availability

Packaging Type
Packaging Information
  • Biotrend® CTL40-D is available in 309 lb. drums and 3,200 lb. totes

Storage & Handling

Shelf Life
5 years