Effective Date: April 17, 2000
Material Safety Data Sheet
For Emergency Call: CHEMTREC -- (800) 424-9300
1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
Product Name: Urea Ammonium Nitrate Solution
CAS Number: None
Chemical Name: Urea Ammonium Nitrate
Chemical Family: Nitrogen Fertilizer Solution
Synonyms and Common Trade Names: UAN (28, 30, and 32%N)
Company Identification
Manufacturer's Name: CF Industries, Inc.
Address: One Salem Lake Drive, Long Grove, Illinois, 60047-8402
Telephone: (847) 438-9500
2. COMPOSITION/INFORMATION ON INGREDIENTS
Weight Percentage
(approximate in each type of solution)
Component Name 32%N 30%N 28%N CAS Number
Ammonium nitrate 45 42.2 39.4 6484-52-2
Urea 35 32.8 30.6 57-13-6
Water 20 25 30 7732-18-5
Ammonium hydroxide 0.1 0.1 0.1 1336-21-6
Corrosion inhibitor 100 to 200 ppm Not available
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Effective Date: April 17, 2000
3. HAZARDS IDENTIFICATION
Emergency Overview
WARNING! Contact with liquid may cause irritation to the eyes
and skin. Ingestion of large quantities may produce
methemoglobinemia. Residues from this product may emit toxic
oxides of nitrogen when heated to decomposition. Activities that
result in drying or evaporating may result in the formation of
ammonium nitrate, a strong oxidizer. Contact of ammonium
nitrate with other materials may cause fire or explosion.
Colorless liquid with almost no odor or slight ammonia odor.
Potential Health Effects
Eyes: Contact may cause mild eye irritation including stinging, watering, and redness.
Skin: Contact may cause mild skin irritation including redness and burning sensation. No harmful
effects from skin absorption have been reported.
Inhalation (Breathing): No information available. Studies of other exposure routes suggest a low
degree of toxicity by inhalation.
Ingestion (Swallowing): Low to moderate degree of toxicity by ingestion.
Signs and Symptoms: Effects of overexposure may include irritation of the nose, throat and
digestive tract, headaches, coughing, nausea, vomiting, diarrhea, and transient disorientation.
Cancer: Inadequate evidence available to evaluate the cancer hazard of this material.
Target Organs: No data available.
Developmental: Inadequate data available for this material.
Other Comments: This material contains nitrate salts. Nitrates may be reduced by intestinal bacteria
to nitrite. When absorbed, nitrites may result in effects on the blood (methemoglobinemia) and blood
vessels (vasodilating and a fall in blood pressure). Symptoms of toxicity may include headache,
fainting, fatigue, cyanosis, confusion, irregular heartbeats, and possible respiratory paralysis.
Medical Conditions Aggravated by Exposure: Pre-existing heart disease may be aggravated by
exposure to nitrates. Pre-existing respiratory or skin disorders may be aggravated by exposure to this
material.
4. FIRST AID
Eyes: Hold eyelids open and flush eyes immediately with water for at least 15 minutes. Seek
medical attention if necessary.
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Effective Date: April 17, 2000
Skin: Remove contaminated shoes and clothing and cleanse affected area(s) thoroughly by
washing with mild soap and water. If irritation or redness develops and persists, seek medical
attention.
Inhalation: Not applicable
Ingestion: If swallowed, seek emergency medical attention. If victim is drowsy or unconscious and
vomiting, place on left side with the head down and do not give anything by mouth. If victim is
conscious and alert and ingestion occurred within the last hour, vomiting should be induced for
ingestion of large amounts (more than 5 ounces in an adult) preferably under direction from a
physician or poison center. If possible, do not leave victim unattended and observe closely for
adequacy of breathing.
Notes to Physician: Nitrates in large doses may cause significant vasodilation and hypotension.
Pre-existing ischemic heart disease may be aggravated by these effects. In large ingestions nitrates
may cause methemoglobinemia. Methemoglobinemia should be suspected if cyanosis occurs.
Methylene blue (1-2 mg/kg I.V. over several minutes) is an effective antidote for symptomatic
methemoglobinemia.
5. FIRE FIGHTING MEASURES
UAN is not flammable.
Flash Point (test method): Not applicable
Flammable Limits: Not applicable
Explosive Limits: Not applicable
Autoignition Temperature: Not applicable
Extinguishing Media: Use extinguishing agent suitable for type of surrounding fire.
NFPA Fire Rating: Not listed
Unusual Fire & Explosion Hazards: Closed containers exposed to extreme heat can rupture due to
pressure buildup.
Fire Fighting Instructions: Nitrate salts can support combustion under certain conditions. Do not
allow product to evaporate to dryness. For fires beyond the incipient stage, emergency responders in
the immediate hazard area should wear bunker gear. When the potential chemical hazard is
unknown, in enclosed or confined spaces, or when explicitly required by DOT, a self-contained
breathing apparatus should be worn. In addition, wear other appropriate protective equipment as
conditions warrant (see Section 8). Isolate immediate hazard area and keep unauthorized personnel
out. Stop spill/release if it can be done with minimal risk. Move undamaged containers from
immediate hazard area if it can be done with minimal risk. Water spray may be useful in minimizing
or dispersing vapors. Cool equipment exposed to fire with water, if it can be done with minimal risk.
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Effective Date: April 17, 2000
6. ACCIDENTAL RELEASE MEASURES
Isolate and stop discharge. Take immediate steps to contain the spill, if possible, and recover any
reusable product. Dispose of any residue after water from spill has evaporated. Consult federal,
state or local regulatory agencies regarding proper disposal of residue.
Neutralizing Chemicals: Not applicable
7. HANDLING AND STORAGE
Handling: Do not enter confined spaces such as tanks or pits without following proper entry
procedures such as ASTM D-4276 and 29CFR 1910.146. Wash thoroughly after handling. Do not
wear contaminated clothing or shoes. Use good personal hygiene practice.
Storage: Keep container(s) tightly closed. Use and store this material in cool, dry, well-ventilated
areas free from combustibles and away from all sources of ignition. Outside or detached storage in
specially designated areas is preferred. Store only in approved containers. UAN is mildly corrosive to
carbon steel. Keep away from any incompatible material. Protect container(s) against corrosion and
o
physical damage. Protect against extremes in temperature. Heating above 140 F will promote
o
hydrolysis. Extreme cold (<32 F) may cause crystallization of the product. Do not allow liquid to
evaporate. Solid ammonium nitrate residue can explode.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Ventilation: Not applicable; product is not volatile.
Specific Personal Protective Equipment
Eye/Face: Approved eye protection to safeguard against potential eye contact, irritation, or injury is
recommended. Depending on conditions of use, a face shield may be necessary.
Skin: The use of gloves impermeable to the specific material handled is advised to prevent skin
contact, possible irritation, and absorption (see glove manufacturer literature for information on
permeability).
Respiratory: Respiratory protection is not usually required.
Other Protective Equipment: A source of clean water should be available in the work area for
flushing eyes and skin. Impervious clothing should be worn as needed.
Exposure Guidelines
Standards for UAN solution have not been established by OSHA or ACGIH.
9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance: Colorless liquid
Odor: Little or no detectable ammonia odor
Odor threshold level: Not available
Physical state: Liquid
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Effective Date: April 17, 2000
pH: 7.0-7.5
Vapor pressure: Not available
Vapor density (air = 1): Approximately 1.07 g/L at 15掳C (59掳F) (30% urea)
Boiling point: >100掳C (>212掳F)
Melting point: (salt out temperature for 28% N solution): 1掳F (-17掳C)
Solubility in water: Miscible with water
Specific gravity (H20 = 1): 1.28(28%N), 1.303(30%N), 1.326(32%N) at 60掳F (15.56掳C); (heavier
than water)
Evaporation rate (butyl acetate = 1): Not applicable
Percentage volatile by volume (%): Not applicable
Molecular weight: Not applicable
Molecular formula: 3 compound mixture: CO(NH2)2, NH4NO3, and H2O
10. STABILITY AND REACTIVITY
Stability (thermal, light, etc.): Stable under normal conditions of storage and handling.
Incompatibility (materials to avoid): Avoid contact with combustible, organic, or other readily
oxidizable materials. Avoid contact with strong acids and chlorates or other strong oxidizers. Contact
with alkaline materials may liberate ammonia.
Hazardous Decomposition Products: Material will not burn, but if involved in a fire, oxides of
carbon and nitrogen may be generated. Exposure to heat may liberate ammonia fumes. When the
water in UAN evaporates, it leaves a residue of solid ammonium nitrate and urea. Solid ammonium
nitrate can explode.
Hazardous Polymerization: Will not occur
Conditions to Avoid: High temperatures - components decompose and emit toxic gases. High
pressures - explodes if heated under confinement so that pressure builds up. Do not allow material
to evaporate to dryness.
11. TOXICOLOGICAL INFORMATION
Toxicological data are not available for UAN. Toxicity values for ammonium nitrate and urea are
listed below.
Ammonium Nitrate
Rat LD50 = 4.5 g/kg
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Effective Date: April 17, 2000
Urea
Rat LD50 = 15 g/kg
Mouse LD50 = 11.5 g/kg
There is no definitive information available on carcinogenicity, mutagenicity, target organs or
developmental toxicity for this product.
12. ECOLOGICAL INFORMATION
Notify local health and wildlife officials and operators of any nearby water intakes upon contamination.
No ecological data are available for UAN. The following data for ammonium nitrate and urea, which
are components of urea ammonium nitrate.
Ammonium Nitrate:
Fertilizers containing ammonium nitrate can cause poisoning in livestock and poultry. Ammonium
nitrate can be toxic to aquatic life and spills may cause algal blooms in static waters.
Ecotoxicity Information: The measured ecotoxicity values for ammonium nitrate include carp
48-hour LC50 values of 74,000 碌g/L (total) and 947 碌g/L (un-ionized) reported in terms of nitrogen.
The minimum lethal concentration of ammonium nitrate for tadpoles is 910 mg/L. Nitrate ion
ecotoxicity values are also available. The freshwater 96-hour and 7-day LC50 values for fingerling
rainbow trout are reported to be 1,350 and 1,065 mg/L nitrate nitrogen, respectively. No effects on
growth or feeding activities were observed in largemouth bass and channel catfish exposed to nitrate
ion concentrations of 400 mg/L.
Environmental Fate Information: Nitrate ions are assimilated by growing plants. Ammonium nitrate
will also be taken up by bacteria. In anaerobic soils, nitrate ions may be converted to nitrite,
molecular nitrogen, nitrous oxide, or ammonium ions.
Urea:
Urea can be toxic to domestic animals and has caused poisonings when it was applied unevenly on
pastures as a fertilizer. Large amounts of urea can damage plant seedlings and inhibit germination.
At high concentrations, urea can be toxic to aquatic life. As a readily available source of nitrogen,
urea can also foster excessive growth of algae or microorganisms in water systems.
Ecotoxicity Information: The cell multiplication toxicity threshold values for bacteria, green algae,
and protozoa are >10,000, >10,000, and 29 mg/L, respectively. The critical range for the creek chub
is 16,000 to 30,000 mg/L in Detroit river water.
Environmental Fate Information: In the soil, urea degrades rapidly, usually within 24 hours;
however, degradation may be slower depending on soil type, moisture content, and urea formulation.
The ultimate degradation products are carbon dioxide and ammonia. The soil mobility is high based
on an organic carbon partition coefficient value of 8. In water, biodegradation to carbon dioxide and
ammonia is the major fate pathway. The biodegradation rate increases with increasing temperature
and presence of phytoplankton. Oxidation of urea by nitrifying bacteria can increase biological
oxygen demand. Bioaccumulation of urea is very low. The 72-hour bioconcentration factor (BCF) for
carp is reported to be 1.
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Effective Date: April 17, 2000
13. DISPOSAL CONSIDERATIONS
UAN is not considered a hazardous waste under Federal Hazardous Waste Regulations 40 CFR 261.
Consult local and state environmental regulatory agencies for acceptable alternative disposal
procedures and locations. Follow standard disposal procedures.
14. TRANSPORT INFORMATION
UAN is not listed as a hazardous material by the U.S. Department of Transportation (DOT), Transport
Canada (TC), and the United Nations (UN).
The U.S. Coast Guard (USCG) defines UAN as hazardous (33 CFR 154.105) when transported in
bulk. USCG lists UAN as a Category D Noxious Liquid Substance (NLS) at 33 CFR 151.47. UAN is
listed as a Category D NLS under MARPOL Annex II.
15. REGULATORY INFORMATION
OSHA (Occupational Safety and Health Administration): This material is considered to be
hazardous as defined by the OSHA Hazard Communication Standard.
SARA TITLE III (Superfund Amendment and Reauthorization Act of 1986): This product contains
the following toxic chemicals subject to the reporting requirements of Section 302 and/or Section 313
of the Emergency Planning and Community Right-to-Know Act of 1986 and of 40 CFR 372:
302
Amount of Threshold
Chemical in CFI Planning 313
Product Quantity for De Minimis
(approximate % Chemical Concentration
CAS No. Chemical Name by weight) (lbs.) (% by weight)
6484-52-2 Ammonium Nitrate 39.4 - 45 Not listed De-listed
Nitrate Compounds 30.5 鈥? 34.9 Not Listed 1.0
User should contact local and state regulatory agencies for information on additional or more
stringent reporting requirements.
U.S. Coast Guard: Designated as a hazardous material under 46 CFR 153.4 (e) that is subject to
U.S. Coast Guard regulations at 33 CFR 154 and 33 CFR 156 when transferred in bulk to or from a
marine vessel with a total storage capacity of 250 or more barrels.
DOT (Department of Transportation): Please refer to Section 14 (Transport Information) for
guidance concerning transportation.
16. Documentary Information and DISCLAIMER OF EXPRESSED AND IMPLIED WARRANTIES
Issue Date: 04/17/00
Previous Issue Date: 06/01/96
The information in this MSDS is based on data available to us as of the revision date given herein,
and believed to be correct. Judgments as to the suitability of information herein for the individual
user鈥檚 own use or purposes are the responsibility of the individual user. Although reasonable care
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Effective Date: April 17, 2000
has been taken in the preparation of such information, CF Industries extends no warranties, makes
no representations (other than those warranties and representations required by law), and assumes
no responsibility as to the accuracy or suitability of such information for application to the individual
user鈥檚 purpose or the consequences of its use for such purpose.
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