NATIONAL FUMIGANTS
MATERIAL SAFETY DATA SHEET
MERKAPTOTEK
DATE ISSUED: 29 July 2003
PAGE: 1 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
COMPANY DETAILS
Name:
Address:
National Fumigants (Pty) Ltd
No. 18 Aschenberg Street
Chamdor
Krugersdorp
Tel. No.:
(011) 769 1300
Fax No.:
(011) 762 5712
Emergency Tel. No.: 083 449 0350
1. PRODUCT IDENTIFICATION:
Trade name:
Chemical Family:
Chemical Name:
Merkaptotek
Organophosphate
MALATHION /MERCAPTOTHION
O,O –dimethyl phosphorodithioate of diethyl mercaptosuccinate Butanedioic acid,
[(dimethoxyphosphinothioyl)thio], diethyl ester S-[1,2-bis(ethoxycarbonyl)ethyl]O-O-dimethylphosphorodithioate
Molecular Formula: C10H19O6PS2
UN No.:
3018
C.A.S. No.:
000121-75-57 (Technical)
Product description: An emulsifiable concentrate for the control of insect pests in stored grain.
2. COMPOSITION:
Hazardous components:
Malathion technical
Emulsifier
Solvent
105.2 g /
12.0 g /
1.23 g /
3. PHYSICAL & CHEMICAL CHARACTERISTICS:
Appearance:
Odor:
Boiling Point: (@760mm Hg):
Clear, yellow liquid
Mercaptan odor
Above 100 ºC
DATE ISSUED: 29 July 2003
PAGE: 2 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
3. PHYSICAL & CHEMICAL CHARACTERISTICS: (continue)
Melting Point:
Specific Gravity:
Solubility:
N/A
1.18 g / @ 20 ºC (formulation)
Emulsifies with water
4. FIRE & EXPLOSION HAZARD DATA:
Flammable limits in air:(% by vol.) Lower: 0.9%
Upper: 6% (both for solvent mixture)
Decomposition Temperature:
For technical: Slow decomposition above 49ºC.
Acute hazards:
Combustible. Formulation contains organic solvents that is slightly
flammable when exposed to heat /flame. Gives of irritating or toxic
fumes (or gases) in a fire.
Prevention:
Keep away from open flames.
Fire extinguishing media:
Water, foam, dry chemical or CO2.
Fire control precautions:
Wear self –contained, positive pressure breathing apparatus and
full fire fighting clothing.
Keep unnecessary people away. Use as little water as possible.
Prevent pesticide run –off. Use spray or fog –solid stream may
cause spreading. Do not contaminate personnel or equipment, or
handle broken packages or containers without protective clothing.
Decontaminate emergency personnel with soap and water before
leaving the fire area.
Avoid breathing dusts, vapors and fumes from burning materials.
Control run –off water –if water enters drainage system, inform
Local Authorities.
Fire fighting from maximum distance.
5. REACTIVITY DATA:
Stability:
Conditions to avoid:
Incompatible materials:
Hazardous decomposition products:
Stable
Can react with oxidizing materials OR (H2SO4 + HNO3),
N2O4, AgClO4.
Storage at 50 – 115 ºC leads to non –hazardous
decomposition. Heating at >150 ºC cause rapid
decomposition. Reactivity with strong base may generate
excessive heat.
Strong alkali’s and strong oxidizers.
Thermal decomposition may produce hydrogen sulfide,
methyl mercaptan dimethyl sulfide, carbon oxide, and
sulfur oxide, phosphorous oxide.
DATE ISSUED: 29 July 2003
PAGE: 3 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
6.
HEALTH HAZARD DATA:
TOXICITY DATA & EFFECTS OF OVEREXPOSURE:
Acute toxicity data (for technical material):
Oral LD50:
Male rats = 2 800 mg /kg
Female rats = 1 000 mg /kg
Dermal LD50: Rabbits = 4 100 mg /kg
Product not irritating to rabbit eye, but is slightly
irritating to the rabbit skin.
Inhalation exposure is not likely to produce any
significant effects, due to low vapor pressure of the
product.
Acute hazards /symptoms:
Inhalation: Headache, dizziness, papillary constriction, muscle cramps, excessive sweating, laboured
breathing, unconsciousness. The symptoms of acute intoxication do not become manifest
until before 30 minutes or 1-2 hours.
Skin:
Headache, dizziness, papillary constriction, muscle cramps, excessive sweating, laboured
breathing, unconsciousness. The symptoms of acute intoxication do not become manifest
until before 30 minutes or 1-2 hours.
Irritation to skin. Will cause dermatitis after prolonged exposure.
Eyes:
Irritation, redness.
Ingestion:
Abdominal cramps, diarrhea, nausea, vomiting, headache, dizziness, pupilliray
constriction, muscle cramps, excessive sweating, laboured breathing, and
unconsciousness. The symptoms of acute intoxication do not become manifest until
before 30 minute or 1 – 2 hours.
Prevention:
Inhalation:
Skin:
Eyes:
Ingestion:
STRICT HYGIENE! PREVENT GENERATION OF MISTS! AVOID EXPOSURE OF
ADDOLESENTS AND CHILDREN. Administer a Cholinesterase blood-testing
program.
Area must be well ventilated. Wear a pesticide cartridge respirator when exposed to the
product.
STRICT HYGIENE! Wear rubber gloves. Boots and an apron or impermeable covering
should be worn where splashing could occur. Wear a long sleeve or shirt and a full –
length pants and overall. Shower at the end of the workday and change clothing. Launder
clothing before re –use.
STRICT HYGIENE! Wear chemical goggles to prevent eye exposure.
STRICT HYGIENE! Do not eat, drink or smoke during work. Wash hands before eating
or smoking.
DATE ISSUED: 29 July 2003
PAGE: 4 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
6. HEALTH HAZARD DATA: (continue)
Emergency & First Aid Procedures:
IN ALL CASES CONSULT A DOCTOR!!
Inhalation:
Remove victim to fresh air. Administer oxygen if there is difficulty in breathing.
Give artificial respiration if person is not breathing. Refer for medical attention.
Skin:
Remove contaminated clothing. Wear impervious gloves. Rinse and then wash
skin with water and soap. Do not omit cleansing hair or under fingernails if
contaminated. Administer oxygen if there is difficulty in breathing. Give artificial
respiration if person is not breathing. Refer for medical attention.
Eyes:
Flush eyes with copious amounts of tap water for at least 15 minutes, while
holding the eyelids open. Refer for medical attention.
Ingestion:
If water diluted mixture has bee swallowed, induce vomiting by tickling the back
of the throat. If concentrate has been swallowed, firstly administer copious
quantities of either beaten egg white, starch solution or Milk of Magnesia, before
induce vomiting. Repeat until vomit fluid is clear and free from smell of poison.
Apply artificial respiration or closed chest cardiac massage, if necessary. Never
give anything by mouth to an unconscious person. Do not apply mouth – to –
mouth respiration. Refer for medical attention.
NOTE TO PHYSICIAN:
Product may inhibit Acetyl Cholinesterase activity. Administer Atropine Sulphate, intravenously (1 – 4
mg) every 5 – 10 minutes until signs of atropinization (dry, flushed skin and tachycardea). 2 – PAM 50
mg /kg up to a total dosage of 1 – 2 g, or 2/3 of this dose Protopam. Repeat if necessary. Never give
Morphine. Clear chest by postural drainage. Artificial respiration or oxygen administration may be
necessary.
7. EXPOSURE CONTROL METHODS:
During formulation the following good industrial hygiene practice is recommended:
When transferring material from one container to another, or where splash hazard exists, wear chemical
goggles to prevent eye exposure. Wear rubber gloves when handling this material. An apron or
impermeable covering should be worn where splashing could occur. A long –sleeved shirt, boots, and
full-length pants (or overalls) should also be worn.
Wash thoroughly with soap and water after handling. Remove contaminated clothing and wash before re
–use.
DATE ISSUED: 29 July 2003
PAGE: 5 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
7. EXPOSURE CONTROL METHODS: (continue)
Wear a pesticide cartridge respirator when exposed to vapor.
Administer a cholinesterase blood-testing program at work.
8. WARNINGS:
Grain treated with Merkaptotek according to instructions is entirely suitable for human and animal
consumption.
Handle Merkaptotek with care.
Store away from food and feedstuffs.
Poisonous if swallowed, by contact on inhalation.
Keep out of reach of children, uninformed persons and animals.
9. PRECAUTIONS FOR SAFE HANDLING & USE:
Spill or leak procedures:
Waste disposal:
Precautions –Handling /Storage:
Wear appropriate protective clothing, dike spill area to prevent
product release, absorb with an inert absorbent material, (e.g.
granular clay or sawdust), and shovel or sweep into covered
containers for proper disposal. Rinses spill area and tools several
times with soapy water. Contain and absorb rinsate with inert
absorbants and place into the same disposal container as spill
residues. Small spills to the soil can shovel directly into disposal
containers. If spill is to a water body, notify Local Authorities
immediately.
To avoid disposal, all should be made to utilize the product
completely, in accordance with it registered use. If this is not
possible, handle with care, and dispose in a safe manner according
to Local regulations, regarding Waste Management. Empty
containers with some product residues, should NOT BE RE –
USED! Triple rinse empty containers and add rinsings to the spray
tank. Render container unusable by crushing and / puncturing, and
dispose in a safe manner.
Do not inhale spray mist. Wash contaminated clothing after the
day’s work. Wash after accidental skin contact with soap and
water. Do not eat, drink or smoke whilst mixing or applying or
before washing hands and face. Do not contaminate water, food, or
feed by storage or disposal. Store in a secure, dry, well –ventilated
separate room, building or covered area. Destroy non –returnable
containers by perforation and do not re –use for any other purpose.
DATE ISSUED: 29 July 2003
PAGE: 6 OF 6
DATE UPDATED: 05 August 2003
PREPARED BY: M.C.SAAIMAN
9. PRECAUTIONS FOR SAFE HANDLING & USE: (continue)
Precautions –Handling /Storage:
(continues)
Do not remove labels from returnable containers. Keep away from
sources of ignition and protect from exposure to fire and heat.
Separate from strong oxidizers, food and foodstuffs.
10. TRANSPORTATION DATA:
Hazardous Description:
Label:
Class:
UN No.:
Packing Group:
Organophosphorous pesticide, Environmentally hazardous, liquid, toxic,
flammable, marine pollutant.
Keep away from food and foodstuffs.
Flammable
6.1
3018
3
Xn symbol
11. ENVIRONMENTAL DATA:
The substance is toxic to aquatic organisms. The substance may be hazardous to the environment;
special attention should be given to honeybees. Toxic to fish and wildlife. Avoid release to the
environment in circumstances different to normal use.
Environmental fate: In animals, following oral administration, the major part of the dose is excreted in
the urine and faeces within 24 hours. Degradation is by oxidative desulfuration by
liver microsomal enzymes, leading to the formation of malaoxon; malathion and
malaoxon are hydrolyzed and thus detoxified by carboxylesterases. In insects,
metabolism involves hydrolysis of the carboxylate and phosphorodithioate esters,
and oxidation to malaoxon.
12. REGULATORY INFORMATION:
National Legislation:
Registration numbers RSA: L 420