Great Plains NH3 Safety - Manual (Page 8)

407-551M Table of Contents Index 2013-07-15
4 NH
3
Safety Table of Contents Index Great Plains Manufacturing, Inc.
Anhydrous Ammonia Information
NH
3
Icons and Decals
Topics in this manual, and the Operator manual, that
concern anhydrous ammonia safety are shown with
these icons nearby.
NFPA 704 3-1-0 hazmat diamond:
(see page 5 for details) This information is for emergency
responders, and is typically displayed only at fixed
anhydrous ammonia facilities (terminals), and not on
nurse tanks or implements.
DOT UN 1005 Class 2.2 hazmat placard:
This information is for trained users of the material and
emergency responders. This decal identifies:
ANHYDROUS AMMONIA
INHALATION HAZARD:
This decal is for all users and the general public.
General NH
3
Information
Fertilizer Type: 82-0-0
Chemical formula: NH
3
CAS number: 7664-41-7
EC NUMBER (EINECS): 231-635-3
EC INDEX NUMBER: 007-001-00-5
NH
3
is a colorless gas at room temperature (any clouds
observed in releases are usually water or ice condensed
from the air by the refrigerant effect of NH
3
evaporation).
NH
3
is a colorless liquid, and is only a liquid at room
temperature if chilled and/or under pressure.
NH
3
gas has a distinctive odor that provides warning of
dangerous concentrations (unless you have impaired
sense of smell, or develop olfactory fatigue/adaptation
due to extended low-level exposure).
Safe field operations can keep exposures below
permissible limits. Unsafe operations, accidents and
malfunctions can result in exposures at ANY
concentration.
NH
3
Concentrations (Parts Per Million)
• Green Color non-flammable (but see “2”)
• Tank Icon content is a gas (at ambient temperature
and atmospheric pressure - in the tank, it
may be a liquid)
• 1005 Material Identity:
Anhydrous Ammonia
• 2 Hazmat Class: Division 2.2:
a non-flammable gas that can ignite
under some circumstances
5 ppm Odor detection threshold (most people)
20-50 ppm Readily detectable odor
25 ppm NIOSH TWA (Time Weighted Average)
exposure limit
35 ppm NIOSH STEL (Short Term Exposure Limit)
50 ppm OSHA PEL (Permissible Exposure Limit,
8 hour TWA)
100 ppm Rapid eye and nose irritation
150-200 ppm General discomfort, eye tearing. No
permanent health effects on short
exposure
200 ppm AIHA ERPG-2 one-hour exposure limit
300 ppm OSHA IDLH (Immediately Dangerous to
Life and Health).
400-700 ppm Severe irritation of eyes, ears, nose and
throat.
1700 ppm Coughing, bronchial spasms
2000-
3000 ppm Dangerous: could be fatal in less than 30
minutes
5000-
10000 ppm Rapidly fatal - escape may be impossible.