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dichlone (Phygon, Quintar) Chemical Profile 2/85

                                      dichlone

      CHEMICAL NAME:      2,3-dichloro-1,4-napthoquinone (56)

      TRADE NAME(S):      Quintar, Phygon (56)

      FORMULATION(S):     Dichlone 50% wettable powder fungicide, dichlone-
                          sulfur 1.5-30 dust (56).

      TYPE:               Napthoquinone fungicide

      BASIC PRODUCER(S):  Hopkins Agricultural Chemical Co.
                          P.O. Box 7532
                          Madison, WI 53707

      STATUS:             General use

      PRINCIPAL USES:  Used on fruit, vegetable, and field crops;
      ornamentals; resident/commercial outdoor areas.  Especially effective
      for brown rot of stone fruit and scab on apples and pears, as well as
      blossom blights (56).  Also used in ponds to control blue algae (48).


                                   I.  EFFICACY

           Especially effective for brown rot of stone fruit and scab on
      apples and pears, as well as blossom blights (56).


                             II.  PHYSICAL PROPERTIES

      MOLECULAR FORMULA:  C10 H4 Cl2 O2 (49)

      MOLECULAR WEIGHT:   227 (49)

      PHYSICAL STATE:     Yellow crystals (pure compound) (49)

      MELTING POINT:      193 C (pure compound); not below 188 C (technical
                          grade) (49).

      SOLUBILITY:         0.1 ppm in water at 25 C (pure compound) (49)


                          III.  HEALTH HAZARD INFORMATION

      OSHA STANDARD:  NA

      NIOSH RECOMMENDED LIMIT:  NA

      ACGIH RECOMMENDED LIMIT:  NA

      TOXICOLOGY

           A.  ACUTE TOXICITY

               DERMAL:  LD50 = 5000 mg/kg (rabbit) (56)
                        A skin irritant under warm conditions (49).

               ORAL:    LD50 = 1300 mg/kg (rat) (56)

           B.  SUBACUTE AND CHRONIC TOXICITY:

           Rats fed for two years on a diet containing 1,500 ppm suffered no
      ill effects (49).


                        IV.  ENVIRONMENTAL  CONSIDERATIONS

           Toxic to fish.  Nonhazardous to honey bees.  Nonphytotoxic when
      used as directed (48).

           As Daphnia magna are immobilized at an LC50 of 0.014 ppm, its use
      as an algicide at 0.15 ppm may create a food chain hazard to microfauna
      (49).


                      V.  EMERGENCY AND FIRST AID PROCEDURES

           The chemical information provided below has been condensed
      from original source documents, primarily from "Recognition and
      Management of Pesticide Poisonings", 3rd ed. by Donald P.  Morgan,
      which have been footnoted.  This information has been provided in
      this form for your convenience and general guidance only.  In
      specific cases, further consultation and reference may be required
      and is recommended.  This information is not intended as a sub-
      stitute for a more exhaustive review of the literature nor for the
      judgement of a physician or other trained professional.

           If poisoning is suspected, do not wait for symptoms to develop.
      Contact a physician, the nearest hospital, or the nearest Poison
      Control Center.

           INGESTION:  Get medical attention for ingestion.  Small doses
      give activated charcoal.  Large doses, gastric lavage may be indicated
      (56).

                        VI.  FIRE AND EXPLOSION INFORMATION

           To be developed.


                                VII.  COMPATIBILITY

           Do not mix with oils, Bordeaux or lime sulfur (48).  Compatible
      with most common fungicides and wettable powder insecticides.  Do not
      use sprays containing lime, calcium arsenate, mercury or dinitro
      compounds, oil or emulsifiable concentrates (56).


                            VIII.  PROTECTIVE MEASURES

      STORAGE AND HANDLING:  Avoid contact with skin.  May cause skin
      and eye irritation.  Avoid breathing dust or spray mist (56).

      PROTECTIVE CLOTHING:  Wear protective clothing.  Glycerol or silicone
      base protective skin creams are recommended to be used.  Lanolin,
      vaseline, or oil-based creams should not be used (56).


                       IX.  PROCEDURES FOR SPILLS AND LEAKS

                     IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
                                  (800) 424-9300
                      PESTICIDE TEAM SAFETY NETWORK/CHEMTREC


                               X.  LITERATURE CITED

      48.  Harding, W.C.  1979-80.  Pesticide profiles, part two:  fungicides
               and nematicides.  Univ. Maryland, Coop. Ext. Service Bull.
               283, 22 pp

      49.  Pesticide Manual, 4th ed.  1974.  H. Martin and C. R. Worthing,
               eds.  British Crop Protection Council, England.  565 pp.

      56.  Farm Chemicals Handbook, 70th ed.  1984.  R. T. Meister, G. L.
               Berg, C. Sine, S. Meister, and J. Poplyk, eds.  Meister
               Publishing Co., Willoughby, OH.

      2/5/85