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.
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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
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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.
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