<< Back to Chemical Sampling Information

Chemical Sampling Information (CSI)
Search (use word(s)/phrase)
Table of Contents
By Name
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

By CAS Number
Quick Links

General Description

Synonyms: Nitric acid, ammonium salt

OSHA IMIS Code Number: A613

Chemical Abstracts Service (CAS) Registry Number: 6484-52-2

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: BR9050000

Chemical Description and Physical Properties: colorless, hygroscopic to white solid
    molecular formula: NH4NO3
    molecular weight: 80.1
    boiling point: 210°C
    melting point: 169°C
Potentially hazardous incompatibilities: May explode under high temperatures or confinement; however, not readily detonated.

Health Factors

Potential symptoms: Irritation of eyes, respiratory tract, skin; cough, sore throat; headache; eye redness, pain; INGES. ACUTE: Abdominal pain, vomiting, diarrhea; weakness, dizziness, convulsions; methemoglobinemia (blue lips, fingernails or skin).

Health Effects: Irritation-Eyes, Nose, Throat, Skin---Intensity undetermined; Methemoglobinemia (HE13); Explosive (HE18).

Affected organs: Respiratory system, eyes, skin, blood

Notes:
  1. OSHA does not have a PEL for ammonium nitrate.
  2. The 1995 bombing of the federal building in Oklahoma City involved binary mixtures of ammonium nitrate with fuel oil (ANFO) and with nitromethane. More recently, occupational explosions of ammonium nitrate fertilizer have occurred in France (2001), Spain (2004), North Korea (2004) and Romania (2004).
  3. Heating ammonium nitrate at temperatures above 210C causes it to decompose into gases. It can also decompose explosively by detonation.
  4. The production of nitrogen dioxide during the use of ANFO in tunnel construction was thought to be a likely cause of temporary decreases in pulmonary function of the construction workers in one study.
Date Last Revised: 04/19/2006

Literature Basis:
  • International Chemical Safety Cards (WHO/IPCS/ILO): Ammonium nitrate.
  • Bakke, B., Ulvestad, B., Stewart, P., Lund, M.B. and Eduard, W.: Effects of blasting fumes on exposure and stort-term lung function changes in tunnel construction workers. Scand. J. Work Environ. Health 27(4): 250-257, 2001.
  • Brunato, F., Garziera, M.G. and Briguglio, E.: A severe methaemoglobinemia induced by nitrates: a case report. Eur. J. Emerg. Med. 10(4): 326-330, 2003.
  • No authors: Ammonium nitrate. Wikipedia (Wikimedia Foundation, Inc.)
  • Pohanish, R.P. (editor): Ammonium Nitrate. In, Sittigs Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 178-179.
Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:

  • Sampling Media: tared 37-mm low-ash polyvinyl chloride filter
    Maximum Volume: 960 Liters maximum flow rate: 2.0 L/min
    Current Analytical Method: Gravimetric
    Method Reference: OSHA Analytical Method (OSHA PV2121)
    Method Classification: Partially Validated
    Note: OSHA personnel can obtain tared sampling media from SLTC.
Wipe sampling:
  • Sampling Media: Whatman smear tab
    Analytical Solvent: Deionized water

* All Trademarks are the property of their respective owners.
Page last updated: 03/09/2007