# NIOSH Pocket Guide to Chemical Hazards
Antimony | CAS 7440-36-0
Sb | RTECS CC4025000
Synonyms & Trade Names Antimony metal, Antimony powder, Stibium | DOT ID & Guide 1549 157 (inorganic compounds, n.o.s.) 2871 170 (powder) 3141 157 (inorganic liquid compounds, n.o.s.)
Exposure Limits | NIOSH REL*: TWA 0.5 mg/m3 [*Note: The REL also applies to other antimony compounds (as Sb).]
OSHA PEL*: TWA 0.5 mg/m3 [*Note: The PEL also applies to other antimony compounds (as Sb).]
IDLH 50 mg/m3 (as Sb) | Conversion
Physical Description Silver-white, lustrous, hard, brittle solid; scale-like crystals; or a dark-gray, lustrous powder.
MW: 121.8 | BP: 2975°F | MLT: 1166°F | Sol: Insoluble
VP: 0 mmHg (approx) | IP: NA |  | Sp.Gr: 6.69
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid in bulk form, but a moderate explosion hazard in the form of dust when exposed to flame.
Incompatibilities & Reactivities Strong oxidizers, acids, halogenated acids [Note: Stibine is formed when antimony is exposed to nascent (freshly formed) hydrogen.]
Measurement Methods NIOSH P&CAM261 (II-4); OSHA ID121, ID125G, ID206
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: Soap wash 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 = 1000) Any supplied-air respirator 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, nose, throat, mouth; cough; dizziness; headache; nausea, vomiting, diarrhea; stomach cramps; insomnia; anorexia; unable to smell properly
Target Organs Eyes, skin, respiratory system, cardiovascular system
See also: INTRODUCTION