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Chemical Datasheet

AMMONIUM NITRATE-UREA SOLUTION

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 6484-52-2
  • 57-13-6
 none data unavailable
  • ANU
NIOSH Pocket Guide International Chem Safety Card
none
  • AMMONIUM NITRATE
  • UREA
NFPA 704
Diamond Hazard Value Description
0
0 3
ox
Blue Health 0 No hazard beyond that of ordinary combustible material.
Red Flammability 0 Will not burn under typical fire conditions.
Yellow Instability 3 Capable of detonation or explosive decomposition or explosive reaction but requires a strong initiating source or must be heated under confinement before initiation.
White Special OX Possesses oxidizing properties.
Note: NFPA ratings shown are for ammonium nitrate, CAS number 6484-52-2
(NFPA, 2010)
General Description
Colorless aqueous solution with a slight ammonia odor. (USCG, 1999)

Hazards

Reactivity Alerts
Air & Water Reactions
Water soluble.
Fire Hazard
Behavior in Fire: Water of solution may evaporate, and remaining solids may then explode. (USCG, 1999)
Health Hazard
Liquid irritates eyes, particularly those grades that contain a little free ammonia. (USCG, 1999)
Reactivity Profile
Mixtures of metal/nonmetal nitrates with alkyl esters may explode, owing to the formation of alkyl nitrates; mixtures of nitrates with phosphorus, tin (II) chloride or other reducing agents may react explosively [Bretherick 1979 p. 108-109]. A mixture of ammonium nitrate and aluminum powder (also zinc, cadmium, copper, magnesium, lead, cobalt, nickel, bismuth, chromium, and antimony behave similarly to aluminum) can be used as an explosive. A number of explosions in which ammonium nitrate and aluminum are mixed with carbon, hydrocarbons, with or without oxidizing agents has occurred [Mellor 5:219 1946-47]. A mixture of ammonium nitrate and acetic acid ignites when warmed, especially if concentrated [Von Schwartz p. 322 1918].
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below.

Response Recommendations

Isolation and Evacuation
No information available.
Firefighting
No information available.
Non-Fire Response
No information available.
Protective Clothing
Goggles or face shield; rubber gloves. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
EYES: wash with plenty of water for 10-15 min. and rinse with a 5% boric acid solution; call a doctor.

SKIN: rinse well with water. (USCG, 1999)

Physical Properties

Chemical Formula:
  • NH4NO3 (ammonium nitrate)
  • CH4N2O (urea)
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 32°F (USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 1.327 at 68°F (USCG, 1999) - Denser than water; will sink
Boiling Point: greater than 212°F at 760 mmHg (USCG, 1999)
Molecular Weight: data unavailable
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Ammonium nitrate (6484-52-2) 6.7 mg/m3 73 mg/m3 440 mg/m3
Urea (57-13-6) 30 mg/m3 280 mg/m3 1700 mg/m3
(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

RELEASE THEFT SABOTAGE
Chemical of Interest CAS Number Min Conc STQ Security
Issue		 Min Conc STQ Security
Issue		 Min Conc STQ Security
Issue
Ammonium nitrate [with more than 0.2 percent combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance] 6484-52-2 ACG 5000 pounds explosive ACG 400 pounds EXP/IEDP
Ammonium nitrate, solid [nitrogen concentration of 23% nitrogen or greater] 6484-52-2 33.00 % 2000 pounds EXP/IEDP

(CISA, 2007)

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names