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acetochlor (Harness) Herbicide Profile 3/85

                                     acetochlor
      CHEMICAL NAME:      2-chloro-N(ethoxymethyl)-6'-ethyl-o-acetotoluidide
                          (58)
      TRADE NAME(S):      MON-097 (58)
      FORMULATION(S):     Emulsifiable concentrate-8 lb/gal (58)
      TYPE:               Herbicide
      BASIC PRODUCER(S):  Monsanto Agricultural Products Co.
                          800 N. Lindbergh Blvd.
                          St. Louis, MO 63167
      PRINCIPAL USES:     For control of most annual grasses and certain
                          broadleaf weeds and yellow nutsedge.  Tolerant
                          crops include corn (all types), soybeans, potatoes,
                          rape, and sunflower (58).
      APPLICATION METHOD(S):  Preemergence, preplant incorporated (58).
                                   I.  EFFICACY
           To be developed.
                             II.  PHYSICAL PROPERTIES
      MOLECULAR FORMULA:  C14 H20 NO2 C1 (58)
      MOLECULAR WEIGHT:   269.8 (58)
      PHYSICAL STATE:     Liquid at room temperature, light yellow to purple
                          oil (pure compound) (58).
      MELTING POINT:      <0 C (pure compound) (58)
      SOLUBILITY:         223 ppm water at 25 C (pure compound) (58)
                          III.  HEALTH HAZARD INFORMATION
      OSHA STANDARD:  NA
      NIOSH RECOMMENDED LIMIT:  NA
      ACGIH RECOMMENDED LIMIT:  NA
      TOXICOLOGY
           A.  ACUTE TOXICITY
               DERMAL:  LD50 = 3667 mg/kg; skin irritation - primary
                        irritation index was 0.6 on a scale of 8.0 (rabbit)
                        (58).
               ORAL:    LD50 = 2953 mg/kg (rat, 8 lb/gal EC) (58)
               EYES:    Eye irritation in rabbits - average score on a
                        scale of 110 of 24-, 48-, and 72-hour readings was
                        18.8 for unwashed eyes and 1.2 for washed eyes (58).
           B.  SUBACUTE AND CHRONIC TOXICITY:
           90 day rat - no significant toxicological effects were observed at a
      dietary level of 800 ppm (58).
                        IV.  ENVIRONMENTAL  CONSIDERATIONS
      General toxicity to wildlife and fish:
           a.  Wildlife - technical
               Acute oral LD50 in Bobwhite quail, 1590 mg/kg.
               Eight-day dietary LC50 in Mallard ducks greater than 5620
               ppm.
               Eight-day dietary LC50 in Bobwhite Quail greater than 5620
               ppm.
           b.  Aquatic Organisms - technical
               96 hour LC50 in Rainbow Trout - 0.45 mg/l
               96 hour LC50 in Bluegill Sunfish - 1.30 mg/l
               48 hour EC50 in Daphnia magna - 16.00 mg/l (58).
      Behavior In Or On Soils
      1.  Adsorption and leaching characteristics in basic soil types:
            Adsorbed by soil colloids; leaches very little.  Low soil moisture
            has little influence on efficiency.
      2.  Microbial breakdown:  Main method of degradation.
      3.  Loss from photodecomposition and/or volatilization:  Negligible.
      4.  Resultant average persistence of recommended rates:  8 to 12
            weeks, but may vary depending on soil type and climatic conditions
            (58).
                      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.
      SYMPTOMS:  Unknown (58).
           SKIN CONTACT:  Flush immediately with large volumes of water.  If
                          irritation persists, consult a physician (58).
           INGESTION:  Induce vomiting (58).
           EYE CONTACT:   Flush immediately with large volumes of water.  If
                          irritation persists, consult a physician (58).
                        VI.  FIRE AND EXPLOSION INFORMATION
           Combustible.  Flash point >93 C (TCC) (58).
                                VII.  COMPATIBILITY
           Compatible with most other pesticides and fluid fertilizers when
      used at recommended rates.  Slightly corrosive to mild steel (58).
                            VIII.  PROTECTIVE MEASURES
      STORAGE AND HANDLING:  Avoid contact with eyes, skin, and clothing.  Do
      not breathe vapors.  Wash thoroughly after handling.  Contaminated
      clothing should be laundered before reuse (58).
                       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
      58.  Weed Science Society of America, Herbicide Handbook Committee.
               1983.  Herbicide handbook of the weed science society of
               America, 5th ed.  Weed Science Society of America, Champaign,
               IL.  515 pp.
      3/5/85