chloroneb (Demosan, Tersan-SP) Chemical Profile 1/85
CHEMICAL NAME: 1,4-Dichloro-2,5-dimethoxybenzene (56)
TRADE NAME(S): Demosan, Tersan SP (48)
FORMULATION(S): 65% wettable powder, sometimes combined with thiram
TYPE: Organochlorine fungicide
BASIC PRODUCER(S): E.I. duPont de Nemours and Co.
1007 Market St.
Wilmington, DE 19898
STATUS: General use
PRINCIPAL USES: Soil systemic and supplemental seed treatment for
seedling diseases of beans, sugar beets, turf and
soybeans. Excellent against damping-off (48).
Used for the treatment of turfgrass to control snow
mold (Typhula) and Pythium blight (56).
To be developed.
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C8 H8 Cl2 O2 (26)
MOLECULAR WEIGHT: 207.1 (26)
PHYSICAL STATE: Colorless crystalline solid (pure compound) (26)
ODOR: Musty odor (pure compound) (26)
MELTING POINT: 133-135 C (pure compound) (26)
BOILING POINT: 268 C (pure compound) (26)
VAPOR PRESSURE: 3 x 10-3 mmHg at 25 C (pure compound) (26)
SOLUBILITY: 8 mg/l water at 25 C (pure compound) (26)
III. HEALTH HAZARD INFORMATION
OSHA STANDARD: NA
NIOSH RECOMMENDED LIMIT: NA
ACGIH RECOMMENDED LIMIT: NA
A. ACUTE TOXICITY
DERMAL: LD50 = >5000 mg/kg (rabbit). A 50% aqueous
suspension of the 65% w.p. caused no irritation to
guinea-pigs and repeated applications did not
result in skin sensitization (26).
ORAL: LD50 = >11,000 mg/kg (rat) (26)
B. SUBACUTE AND CHRONIC TOXICITY:
To be developed.
IV. ENVIRONMENTAL CONSIDERATIONS
Hazardous to fish and wildlife. Nonphytotoxic when used as
directed. Does not leach from the soil (48).
The material was not toxic to bluegill Sunfish at 4,200 ppm in the
48 hour exposure (21e).
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
SKIN CONTACT: Wash thoroughly with soap and water (56).
EYE CONTACT: Flush immediately with running water and get medical
attention if irritation persists (56).
VI. FIRE AND EXPLOSION INFORMATION
To be developed.
Compatible with most other pesticides (48).
VIII. PROTECTIVE MEASURES
STORAGE AND HANDLING: Keep out of reach of children. Avoid breathing
dust or spray mist. Avoid contact with skin, eyes, and clothing. Do
not reuse container, bury when empty (21e). Store in a cool, dry place
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
X. LITERATURE CITED
21e. Canada Department of Agriculture, Production and Marketing Branch,
Plant Products Division. 1970. Memorandum (re: chloroneb).
Ottawa, Ontario, Canada.
26. The Pesticide Manual: A World Compendium, 6th ed. 1979. C. R.
Worthing, ed. The British Crop Protection Council, Croydon,
England. 655 pp.
48. Harding, W.C. 1979-80. Pesticide profiles, part two: fungicides
and nematicides. Univ. Maryland, Coop. Ext. Service Bull.
283, 22 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.