Brandt SB4000, Operator'S Manual

Page: 18 / 145

7
CHEMICAL TOXICITY AND LD
50
VALUES
LD
50
values are used to rate the toxicity of pesticides.
The LD
50
refers to the dose of pesticide (in mg per kg
of the test animal’s body weight) that is lethal to 50%
of the group of test animals. For example, if a
pesticide has an LD
50
value of 10 mg/kg, and the
test animals each weigh 1 kg, then 50% of the animals
would die if they each ate 10 mg of the pesticide.
Different types of protective equipment are required
for pesticides that differ in toxicity. Special equipment
requirements are described on the product label, but in
general the following precautions must be taken when
using pesticides of different hazard ratings.
Danger Poison - requires goggles, respirator,
gloves and skin protection,
avoid fumes and spray mist.
Warning Poison - requires goggles, respirator,
gloves and skin protection,
avoid fumes and spray mist.
Caution Poison - requires goggles, respirator,
gloves and skin protection,
avoid fumes and spray mist.
The absence of a hazard symbol on a pesticide label
indicates low toxicity to mammals. Nevertheless,
protective clothing should be worn when using
pesticides that do not have a hazard symbol.
T
ABLE
2.2 O
RAL
LD
50
V
ALUES AS THEY
RELATE TO
R
ISK
/H
AZARD
S
YMBOLS