# NIOSH Pocket Guide to Chemical Hazards
Barium nitrate (as Ba) | CAS 10022-31-8
Ba(NO3)2 | RTECS CQ9625000
Synonyms & Trade Names Barium dinitrate, Barium(II) nitrate (1:2), Barium salt of nitric acid | DOT ID & Guide 1446 141
Exposure Limits | NIOSH REL*: TWA 0.5 mg/m3 [*Note: The REL also applies to other soluble barium compounds (as Ba) except Barium sulfate.]
OSHA PEL*: TWA 0.5 mg/m3 [*Note: The PEL also applies to other soluble barium compounds (as Ba) except Barium sulfate.]
IDLH 50 mg/m3 (as Ba) | Conversion
Physical Description White, odorless solid.
MW: 261.4 | BP: Decomposes | MLT: 1094°F | Sol: 9%
VP: Low | IP: ? |  | Sp.Gr: 3.24
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid, but will accelerate the burning of combustible materials.
Incompatibilities & Reactivities Acids, oxidizers, aluminum-magnesium alloys, (barium dioxide + zinc) [Note: Contact with combustible material may cause fire.]
Measurement Methods NIOSH 7056; OSHA ID121
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 5 mg/m3: (APF = 10) Any dust and mist respirator except single-use and quarter-mask respirators/(APF = 10) Any supplied-air respirator Up to 12.5 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 25) Any powered, air-purifying respirator with a dust and mist filter Up to 25 mg/m3: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 50 mg/m3: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, upper respiratory system; skin burns; gastroenteritis; muscle spasm; slow pulse, extrasystoles; hypokalemia
Target Organs Eyes, skin, respiratory system, heart, central nervous system
See also: INTRODUCTION