hexakis (Vendex) Chemical Profile 4/85
CHEMICAL NAME: Hexakis (2-methyl-2-phenylpropyl)-distannoxane (56)
TRADE NAME(S): Vendex (1)
FORMULATION(S): Available as a 50% wettable powder water soluble
bag and 4 pounds per gallon liquid concentrate
(4L). Vendex 50WP is packaged in 1-lb. water soluble
bags. Vendex 4L is packaged in 1 gal. containers
TYPE: Organic tin miticide
BASIC PRODUCER(S): Shell Chemical Company
P.O. Box 3871
Houston, TX 77001
STATUS: General use
PRINCIPAL USES: Selective organotin miticide giving long residual
control of plant feeding mites on deciduous fruits, citrus, grapes,
almonds, greenhouse crops, and ornamentals (56).
Non-volatile and non-systemic so it kills by contact action. No
ovicidal activity. Mites are paralyzed prior to death sometimes
requiring 2-3 days for them to die. Gives long lasting control (8a).
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C60 H78 O Sn2 (62)
MOLECULAR WEIGHT: 1053 (62)
PHYSICAL STATE: Colorless crystalline powder (technical product)
ODOR: Mild chemical odor (18f)
MELTING POINT: 138-139 C (technical product) (62)
SOLUBILITY: 5 ug/l water at 23 C (technical product) (62)
III. HEALTH HAZARD INFORMATION
OSHA STANDARD: None established
NIOSH RECOMMENDED LIMIT: None established
ACGIH RECOMMENDED LIMIT: None established
A. ACUTE TOXICITY
DERMAL: LD50 = >2000 mg/kg (rabbit) (62)
ORAL: LD50 = 2630 mg tech./kg (rat); 1450 mg/kg (mouse);
>1500 mg/kg (dog) (62).
B. SUBACUTE AND CHRONIC TOXICITY:
In feeding trials of less than or equal to 2-yr. duration there was
no effect of toxicological significance in rats receiving 100 mg/kg
diet or dogs 30 mg/kg daily (62).
C. EPA TOLERANCE SUPPORT DATA:
ADI for man 0.03 mg/kg (62).
IV. ENVIRONMENTAL CONSIDERATIONS
Little or no hazard to birds, fish and beneficial insects.
Biological magnification unlikely. Nonphytotoxic when used as directed
LC50 (8-day) for bobwhite quail 5065 mg/kg diet. The LC50 (48-hr)
for rainbow trout was 0.27 mg a.i. (as w.p./l). Oral LD50 > 100 ug/bee
(62). It is relatively non-toxic to predacious arthropods including
Stethorus punctum and Amblyseius finlandicus (62).
Toxic to fish. Non-toxic to honeybees (8a).
The acute oral LD50 of Vendex in mallard ducks and ring-necked
pheasants is greater than 2000 mg/kg. Median tolerance limits (TL50)
after 96-hour exposures to bluegill, fathead minnow and rainbow trout
were 4.8, 1.9 and 1.7 ppb, respectively (18f).
Approximate Residual Period: 2-7 days on plant surfaces (1).
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
SYMPTOMS: Irritation to skin, eyes or respiratory tract (18f).
SKIN CONTACT: Flush with plenty of water. Treat symptomatically
and supportively. If skin irritation persists see a
INGESTION: Do not induce vomiting (56).
EYE CONTACT: Flush with plenty of water; see a physician. Treat
symptomatically and supportively (56).
VI. FIRE AND EXPLOSION INFORMATION
To be developed.
Generally compatible except with alkaline materials (1).
VIII. PROTECTIVE MEASURES
STORAGE AND HANDLING: Avoid breathing dust or spray mist (56).
PROTECTIVE CLOTHING: Wear protective goggles and gloves during mixing
and spraying operations (56).
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
X. LITERATURE CITED
1. Harding, W.C. 1979. Pesticide profiles, part one: insecticides
and miticides. Univ. Maryland, Coop. Ext. Serv. Bull. 267.
8a. Thomson, W. T. 1976. Agricultural chemicals - book 1:
insecticides, acaricides, and ovicides. Revised ed. Thomson
Publ., Indianapolis, IN. 232 pp.
18f. Shell Chemical Company, Agricultural Chemicals. 1982.
Technical data bulletin: summary of basic data for
Vendex miticide. Houston, TX.
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.
62. The Pesticide Manual: A World Compendium, 7th ed. 1983. C.R.
Worthing, ed. The British Crop Protection Council, Croydon,
England. 695 pp.