United States oWa, of Pettieidei «nd To«Je Substances Environmental Protection Office of Pestiade Programs (TS-766CI Agency Washington, DC 20460 v°/EPA Pesticide Fact Sheet Name of Chemical: DANTOCHLOR Reason for Issuance: Date Issued: ^ 12, 1984 Fact Sheet Number: 2pt.l2, 1984 1. Description of chemical Generic Name: Chlorinated Hydantoin Derivative Common name: 1,3-dichloro-5-ethyl-5-methylhydantoin Trade name: Dantochlor EPA Shaughnessy code: 1128826 Chemical Abstracts Service (CAS) number- Year of initial registration: 1984 Pesticide type: Disinfectant (Slimicide. Algaecide, and Bactericide) Chemical family: Hydantoins U. S. and foreign producers: Glyco Inc. 2. Use patterns and formulations Application sites: recirculating cooling water (Cooling Towers and air washers) Types of formulations: Tablets (Briquettes) Types and Methods of application: Manual Application rates: 0.1 to 0.125 Ib. per 1000 gal per day=12.90 pprr. t'suaj carriers: usually marketed in concentrated form with other reiaiec chlorinated and brominated hydantoins '. . Science Findings Chemical Characteristics: solid, white powder, granules or briquettes, slight chlorine odor, melting point 106-130°c, Strong oxidizing agent, corrosive to tissues, and metals, capable of spontaneous reaction with water, organic contaminants. Toxicology characteristics: Major routes of exposure in order of toxicological significance. Toxicity Category and values for each acute hazard: acute Oral-Category 3, Eye Irritation Category 1, Acute Dermal- Category 3. Skin Irritation-Category 1. ------- 2 Chronic toxicology resuits Mutaaenicity no adverse efect was Cytogenicity shown in these studies Skin Absorptf n Study for the proposed uses Exposure Assesment to address risk Physiological and Biochemical Behavioral Characteristics: Foliar absorption: N/A Transolocation? N/A Mechanism of pesticidal action: Hydrolyses in water to yield hypochlorous acid, (which is the disinfecting agent) and hydantoin. Metabolism and persistence in plants and animals. N/A Envirora.iental Characteristics: Absorption and leaching in basic soil types: N/A Microbial breakdown. N/A Loss from photodecoinposition and/or volatization: neglible Bloaccurnulation: N/A Resultant average persistance: N/A Ecological Characteristics: Hazards to fish and wildlife (avian oral and dietary LD 50 , fish LC 50 and aquatic invertebrate LC 50 ). Potential problems related to endangered species: There are potential risks associated with the use of this product to aquatic organisms. NPDES permits are required and may mitigate hazards. Tolerance assessments: No crop applications Problems which are known to have occurred with use of the chemical (e.g., P.I.M.S. data). None Summary ot Regulatory Position and Rationale: Use Classification? General Use formulation or geographical restrictions: not to be registered for use in Spas, Hot Tubs, and swimming pools until additional chronic studies are submitted and accepted. Unique warning statements required on labels: None ------- 3 Regulatory decisions in cases where risk assessments were conducted, including consideration of benefits: Benefits èxC eds risks for the use of the product in air recirculation water washers and cooling towers. Summary of major data gaps and dates when these major data gaps are due to be filled: There are rio data gaps for the approved uses. Contact person at EPA (A. E. Castillo, 401 M St., SW: Washington. DC. 20460 TS—767C, 703—557—3964. DISCLAIMER: The information presented in this Chemical Information Fact Sheet is for informational purposes only and may not be used to fulfill data requirements for pesticide registration and re- registration. ------- |