The MSDS format adheres to the standards and regulatory requirements
of the United States and may not meet regulatory requirements
in other countries.
DuPont Page 1
Material Safety Data Sheet
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"DuPont" "STEADFAST" ATZ HERBICIDE
M0000481 Revised 1-OCT-2007
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CHEMICAL PRODUCT/COMPANY IDENTIFICATION
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Material Identification
STEADFAST is a registered trademark of DuPont.
"DuPont" is a trademark of DuPont.
Tradenames and Synonyms
DUPONT STEADFAST ATZ
STEADFAST ATZ
DPX-G3B65
NICOSULFURON
RIMSULFURON
ATRAZINE
Company Identification
MANUFACTURER/DISTRIBUTOR
DuPont
1007 Market Street
Wilmington, DE 19898
PHONE NUMBERS
Product Information : 1-800-441-7515 (outside the U.S.
302-774-1000)
Transport Emergency : CHEMTREC 1-800-424-9300(outside U.S.
703-527-3887)
Medical Emergency : 1-800-441-3637 (outside the U.S.
302-774-1000)
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COMPOSITION/INFORMATION ON INGREDIENTS
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Components
Material CAS Number %
NICOSULFURON 111991-09-4 2.7
2-[[(4,6-DIMETHOXYPYRIMIDIN-2-YL)AMINO-
CARBOXYL]AMINOSULFONYL]-N,N-DIMETHYL-3-
PYRIDINECARBOXAMIDE
RIMSULFURON 122931-48-0 1.3
N((4,6-DIMETHOXYPYRIMIDIN-2-YL)AMINOCARBONYL)-
3-(ETHYLSULFONYL)-2-PYRIDINESULFONAMIDE
*ATRAZINE 1912-24-9 85.3
2-CHLORO-4-(ETHYLAMINO)-6-(ISOPROPYLAMINO)-S-
TRIAZINE
INERT INGREDIENTS 10.7
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Material Safety Data Sheet
(COMPOSITION/INFORMATION ON INGREDIENTS - Continued)
* Disclosure as a toxic chemical is required under Section 313 of
Title III of the Superfund Amendments and Reauthorization Act of 1986
and 40 CFR part 372.
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HAZARDS IDENTIFICATION
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Emergency Overview
Caution! Harmful if absorbed through the skin. Avoid
contact with skin, eyes or clothing.
Potential Health Effects
Based on animal data, eye contact with Steadfast ATZ may cause eye
irritation with discomfort, tearing, or blurring of vision.
Inhalation of the dust may cause irritation of the upper
respiratory passages, with coughing.
Ingestion may cause irritation of the mouth and stomach with
nonspecific discomfort, such as nausea, or weakness.
Gross over-exposure by inhalation or ingestion may cause abnormal
liver function as detected by laboratory tests.
Carcinogenicity Information
None of the components present in this material at concentrations
equal to or greater than 0.1% are listed by IARC, NTP, OSHA or ACGIH
as a carcinogen.
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FIRST AID MEASURES
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First Aid
IF ON SKIN OR CLOTHING: Take off contaminated clothing.
Rinse skin immediately with plenty of water for 15-20
minutes. Call a poison control center or doctor for
treatment advice.
IF INHALED: No specific intervention is indicated, as the
compound is not likely to be hazardous by inhalation.
Consult a physician if necessary.
IF SWALLOWED: No specific intervention is indicated, as the
product is not likely to be hazardous by ingestion.
Consult a physician if necessary.
IF IN EYES: No specific intervention is indicated, as the
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Material Safety Data Sheet
(FIRST AID MEASURES - Continued)
product is not likely to be hazardous to the eyes. Consult
a physician if necessary.
Have the product container or label with you when calling a
poison control center or doctor, or going for treatment.
You may also contact 1-800-441-3637 for emergency medical
treatment information.
Notes to Physicians
There is no specific antidote for atrazine. If this product
is ingested, induce emesis or lavage stomach. The use of
an aqueous slurry of activated charcoal may be considered.
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FIRE FIGHTING MEASURES
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Flammable Properties
The material poses no explosion hazard in granular form.
Like most organic powders or crystals, under severe dusting
conditions, this material may form explosive mixtures in air.
Fire and Explosion Hazards:
Hazardous gases/vapors produced in fire are carbon monoxide,
hydrogen cyanide, acetonitrile.
Extinguishing Media
Water, Foam, Dry Chemical, CO2.
Fire Fighting Instructions
Keep personnel removed and upwind of fire. Wear self-contained
breathing apparatus. Wear full protective equipment. Runoff from
fire control may be a pollution hazard.
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ACCIDENTAL RELEASE MEASURES
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Safeguards (Personnel)
NOTE: Review FIRE FIGHTING MEASURES and HANDLING (PERSONNEL)
sections before proceeding with clean-up. Use appropriate
PERSONAL PROTECTIVE EQUIPMENT during clean-up.
Evacuate personnel, thoroughly ventilate area, use self-contained
breathing apparatus. Avoid dust generation.
Initial Containment
Prevent material from entering sewers, waterways, or low areas.
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Material Safety Data Sheet
(ACCIDENTAL RELEASE MEASURES - Continued)
Spill Clean Up
Shovel or sweep up. Avoid causing dust. Dispose of in an
approved container. Small spills may be collected with absorbent
materials. Flush spill area with water. Do not allow to
contaminate groundwater systems.
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HANDLING AND STORAGE
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Handling (Personnel)
Do not breathe dust. Do not get in eyes, on skin, or on
clothing. Wash thoroughly after handling. Wash clothing
after use. Do not store or consume food, drink or tobacco
in areas where they may become contaminated with this
material.
USERS SHOULD: Wash hands before eating, drinking, chewing
gum, using tobacco or using the toilet. Remove clothing/PPE
immediately if pesticide gets inside. Then wash thoroughly
and put on clean clothes. Remove PPE immediately after
handling this product. Wash the outside of gloves before
removing. As soon as possible, wash thoroughly and change
into clean clothing.
Handling (Physical Aspects)
Avoid dust generation.
Storage
Store product in original container only. Do not
contaminate water, other pesticides, fertilizer, food or
feed in storage. Store in a cool, dry place.
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EXPOSURE CONTROLS/PERSONAL PROTECTION
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Engineering Controls
Use only with adequate ventilation. Keep container tightly closed.
Do not generate dust.
When applicators use enclosed cabs in a manner that meets
the requirements listed in the Worker Protection Standard
(WPS) for agricultural pesticides [40 CFR 170.240(d)(4-6)],
the handler PPE requirements may be reduced or modified as
specified in the WPS.
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Material Safety Data Sheet
(EXPOSURE CONTROLS/PERSONAL PROTECTION - Continued)
Personal Protective Equipment
Always follow the label instructions when handling this
product.
Some materials that are chemical resistant to this product
are listed below. If you want more options, follow the
instructions for Category A on the EPA chemical resistance
category selection chart.
Mixers, loaders, cleaners of equipment or spills, and other
handlers exposed to the concentrate must wear:
Coveralls over long sleeved shirt and long pants.
Chemical Resistant Gloves Category A (such as butyl
rubber, natural rubber, neoprene rubber, or nitrile
rubber) greater than or equal to 14 mils.
Chemical-resistant footwear plus socks.
Chemical-resistant apron.
A NIOSH approved dust mist filtering respirator with any
N, R, P, or HE filter or a NIOSH-approved dust mist
filtering respirator with approval number prefix TC-21C.
Applicators and all other handlers exposed to the dilute
must wear:
Long sleeved shirt and long pants.
Shoes plus socks.
Chemical Resistant Gloves Category A (such as butyl
rubber, natural rubber, neoprene rubber, or nitrile
rubber) greater than or equal to 14 mils.
See engineering controls for additional requirements.
Follow manufacturer's instructions for cleaning and
maintaining PPE. If no such instructions for washables, use
detergent and hot water. Keep and wash PPE separately
from other laundry.
Discard clothing and other absorbent materials that have
been drenched or heavily contaminated with this product's
concentrate. Do not reuse them.
PPE required for early entry to treated areas that is
permitted under the Worker Protection Standard and that
involves contact with anything that has been treated, such
as plants, soil, or water is:
Coveralls.
Chemical-Resistant Gloves Category A (such as butyl
rubber, natural rubber, neoprene rubber, or
nitrile rubber), greater than or equal to 14 mils.
Shoes plus socks.
Exposure Guidelines
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Material Safety Data Sheet
Applicable Exposure Limits
NICOSULFURON
PEL (OSHA) : None Established
TLV (ACGIH) : None Established
AEL * (DuPont) : 5 mg/m3, 8 & 12 Hr. TWA, respirable dust
dust
RIMSULFURON
PEL (OSHA) : None Established
TLV (ACGIH) : None Established
AEL * (DuPont) : 5 mg/m3, 8 & 12 Hr. TWA, total dust
ATRAZINE
PEL (OSHA) : None Established
TLV (ACGIH) : 5 mg/m3, 8 Hr. TWA, A4
AEL * (DuPont) : 0.5 mg/m3, 8 & 12 Hr. TWA, total dust
* AEL is DuPont's Acceptable Exposure Limit. Where governmentally
imposed occupational exposure limits which are lower than the AEL
are in effect, such limits shall take precedence.
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PHYSICAL AND CHEMICAL PROPERTIES
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Physical Data
pH : 6.6
Odor : None
Form : Solid, granules
Color : Light beige
Bulk Density : 0.497 g/mL
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STABILITY AND REACTIVITY
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Chemical Stability
Stable.
Decomposition
Hazardous gases or vapors can be released, including carbon
monoxide, hydrogen cyanide, acetonitrile.
Polymerization
Polymerization will not occur.
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Material Safety Data Sheet
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TOXICOLOGICAL INFORMATION
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# Animal Data
Steadfast ATZ
Oral LD50: 2245 mg/kg in rats
(Data for a similar formulation)(Slightly toxic)
Inhalation 4 hour LC50: > 5.3 mg/L in rats
(Data for a similar formulation)(Slightly toxic)
Dermal LD50: > 2000 mg/kg in rabbits
(Data for a similar formulation)(Slightly toxic)
Steadfast ATZ is not a skin irritant, but is a slight eye
irritant. Animal data for a similar formulation indicates it will
not be a skin sensitizer.
ATRAZINE
Effects in animals from single inhalation exposure to an 80%
wettable powder produced no observed signs of toxicity.
Toxicity described in animals from the administration of single
oral doses include central nervous system effects, hypoactivity
and frequent urination. In a 90-day feeding study in rats,
repeated oral dosing of 0.6 to 34 mg/kg bw/day resulted in
decreased body, liver and kidney weight in high dose males. Iron
pigments were found in the spleen of male and female rats at the
high dose level. Long term (2-year) dietary studies in rats
resulted in decreased body weight, decrease in red cell parameters
(female rats only), and changes in clinical chemical parameters at
0.6 mg/kg bw/day and above. Cardiotoxicity was observed in a
long-term study with high doses in dogs.
Atrazine is a weak carcinogen in one female rat strain producing
an increased incidence of mammary tumors in a two year feeding
study at 3.5 mg/kg bw/day and above. There were no tumors at 1.5
mg/kg/day and below. Atrazine was negative for carcinogenicity in
mice and was also negative in a different rat strain. Based on
this unique tumor response in a single rat strain and a review of
multiple studies, EPA and IARC have concluded that atrazine is not
likely to be carcinogenic to humans. Tests in rats and rabbits
indicate that Atrazine may have developmental toxicity but only at
maternally toxic dose levels of 70 mg/kg/day and above. It is not
a unique hazard to the conceptus. Tests in animals demonstrate
no reproductive toxicity.
The weight of evidence from bacterial and mammalian cell cultures
and from animal tests indicate atrazine does not cause genetic
damage.
NICOSULFURON
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Material Safety Data Sheet
(TOXICOLOGICAL INFORMATION - Continued)
In a short-term, repeated dose study in rats and mice with the
active ingredient, Nicosulfuron, there were no toxicologically
significant changes; the NOEL for each study was 2200 mg/kg. In
90-day feeding studies in mice the number of certain types of
white blood cells was reduced; however, this was not observed in
dogs or rats. This observation was not associated with bone
marrow effects was not reproducible in mice exposed up to
18-months to Nicosulfuron. There were no other toxicologically
significant changes during these 90-day tests. In a one-year
feeding study in dogs Nicosulfuron caused decreased body weight
and increased liver weights in male dogs; the NOEL was 5000 ppm
for male dogs and 20,000 ppm for female dogs.
Tests in rats and mice with Nicosulfuron demonstrate no
carcinogenic activity. Tests in animals demonstrate no
reproductive or developmental toxicity. Nicosulfuron has not
produced genetic damage in bacterial or mammalian cell cultures or
in animals.
RIMSULFURON
Single inhalation exposures to Rimsulfuron caused nonspecific
effects such as weight loss, and irritation.
Single dermal exposures to Rimsulfuron caused nonspecific effects
such as weight loss.
Repeated and long-term ingestion exposures in animals with
Rimsulfuron resulted in non-specific body weight, organ weight,
and mild hematologic and clinical chemistry changes. A 1-year
feeding study in dogs resulted in mild tracheal effects.
Rimsulfuron did not demonstrate carcinogenic effects in long-term
feeding studies in rats or mice. Rimsulfuron did not cause
developmental or reproductive effects in animals. Rimsulfuron did
not produce genetic damage in bacterial or mammalian cell cultures
or in animals.
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ECOLOGICAL INFORMATION
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Ecotoxicological Information
AQUATIC TOXICITY:
ATRAZINE
96 hour LC50 - Rainbow trout: 4.5 ppm.
AVIAN TOXICITY:
ATRAZINE
LC50 - Bobwhite Quail: > 5000 ppm.
LC50 - Mallard Duck: > 5000 ppm.
AQUATIC TOXICITY:
NICOSULFURON
96 hour LC50 - Bluegill sunfish: > 1000 mg/L.
96 hour LC50 - Rainbow trout: > 1000 mg/L.
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Material Safety Data Sheet
(ECOLOGICAL INFORMATION - Continued)
48 hour EC50 - Daphnia magna: > 1000 mg/L.
AVIAN TOXICITY:
NICOSULFURON
Acute Oral LD50 - Bobwhite Quail: > 2250 mg/kg.
Acute Dietary LC50 - Bobwhite Quail: > 5620 ppm.
Acute Dietary LC50 - Mallard Duck: > 5620 ppm.
AQUATIC TOXICITY:
RIMSULFURON
96 hour LC50 - Rainbow trout: > 390 mg/L.
96 hour LC50 - Bluegill sunfish: > 390 mg/L.
96 hour LC50 - Carp: > 900 mg/L.
AVIAN TOXICITY:
RIMSULFURON
Acute Oral LD50 - Bobwhite Quail: > 2250 mg/kg.
Acute Oral LD50 - Mallard Duck: > 2000 mg/kg.
Acute Dietary LC50 - Bobwhite Quail: > 5620 ppm.
Acute Dietary LC50 - Mallard Duck: > 5620 ppm ppm.
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DISPOSAL CONSIDERATIONS
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Waste Disposal
Treatment, storage, transportation, and disposal must be in
accordance with applicable Federal, state/provincial, and
local regulations. Do not flush to surface water or
sanitary sewer system.
Do not contaminate water, food, or feed by disposal. Waste
resulting from the use of this product may be disposed of on
site or at an approved waste disposal facility.
ENVIRONMENTAL HAZARDS
Atrazine, one of the active ingredients of STEADFAST ATZ is
a pesticide that can move (seep or travel) through soil and
can enter groundwater that may be used as drinking water.
Atrazine has been found in groundwater. Users are advised
not to apply STEADFAST ATZ where the water table
(groundwater) is close to the surface and where the soils
are very permeable (i.e., well-drained soils). Local
agricultural agencies can provide further information on the
type of soil in your area and the location of groundwater.
Container Disposal
For Plastic Containers:
Triple rinse (or equivalent) the container. Then offer for
recycling or reconditioning, or puncture and dispose of in a
sanitary landfill, or by incineration, or if allowed by
state and local authorities, by burning. If burned, stay
away from smoke.
For Fiber Sacks:
M0000481 DuPont Page 10
Material Safety Data Sheet
(DISPOSAL CONSIDERATIONS - Continued)
Completely empty fiber sack by shaking and tapping sides and
bottom to loosen clinging particles. Empty residue into
application equipment. Dispose of bags at an approved waste
disposal facility, in accordance with Federal, state, and
local regulations.
For Fiber Drums with Liners:
Completely empty fiber sack by shaking and tapping sides and
bottom to loosen clinging particles. Empty residue into
application equipment. Then dispose of liner in a sanitary
landfill or by incineration if allowed by state and local
authorities. If drum is contaminated and cannot be reused,
dispose of in the same manner.
For Bags Containing Water-Soluble Packets:
Do not reuse the outer box or the resealable plastic bag.
When all water-soluble packets are used, the outer packaging
should be cleaned and may be disposed of in a sanitary
landfill or by incineration, or if allowed by state and
local authorities, by open burning. If burned, stay out
of smoke. If the resealable plastic bag contacts the
formulated product in any way, the bag must be triple-rinsed
with clean water. Add the rinsate to the spray tank and
dispose of the outer wrap as described above.
For Metal Containers (non aerosols):
Triple rinse (or equivalent) the container. Then offer for
recycling or reconditioning, or puncture and dispose of in
a sanitary landfill, or by other procedures approved by
state and local authorities.
For Paper and Plastic Bags: Completely empty bag into
application equipment. Then dispose of empty bag in a
sanitary landfill or by incineration, or if allowed by
state and local authorities, by burning. If burned, stay
out of smoke.
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TRANSPORTATION INFORMATION
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Shipping Information
DOT/IMO
Proper Shipping Name : NOT REGULATED
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Material Safety Data Sheet
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REGULATORY INFORMATION
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U.S. Federal Regulations
TITLE III HAZARD CLASSIFICATIONS SECTIONS 311, 312
Acute : Yes
Chronic : Yes
Fire : No
Reactivity : No
Pressure : No
This product is registered under EPA/FIFRA regulations.
EPA Reg. No. 352-619
RESTRICTED USE PESTICIDE
For retail sale to and use only by Certified Applicators or
persons under their direct supervision and only for those
uses covered by the Certified Applicator's certification.
This product is a restricted use herbicide due to ground and
surface water concerns. Users must read and follow all
precautionary statements and instructions for use in order
to minimize potential for atrazine to reach ground and
surface water.
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OTHER INFORMATION
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NFPA, NPCA-HMIS
NFPA Rating
Health :2
Flammability :0
Reactivity :0
NPCA-HMIS Rating
Health :2
Flammability :0
Reactivity :0
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The data in this Material Safety Data Sheet relates only to the
specific material designated herein and does not relate to use in
combination with any other material or in any process.
Responsibility for MSDS: DuPont Crop Protection
Address : Wilmington, DE 19898
Telephone : 1-888-638-7668
# Indicates updated section.
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Material Safety Data Sheet
(Continued)
This information is based upon technical information believed to be
reliable. It is subject to revision as additional knowledge and
experience is gained.
End of MSDS
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