Tetramethyl lead (as Pb)
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CAS
75-74-1
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Pb(CH3)4
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RTECS
TP4725000
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Synonyms & Trade Names
Lead tetramethyl, Tetramethylplumbane, TML
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 0.075 mg/m3 [skin]
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OSHA PEL: TWA 0.075 mg/m3 [skin]
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IDLH
40 mg/m3 (as Pb)
See: 75741
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Conversion
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Physical Description
Colorless liquid (unless dyed red, orange, or blue) with a fruity odor. [Note: Main usage is in anti-knock additives for gasoline.]
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MW: 267.3
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BP: 212°F (Decomposes)
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FRZ: -15°F
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Sol: 0.002%
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VP: 23 mmHg
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IP: 8.50 eV
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Sp.Gr: 2.00
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Fl.P: 100°F
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UEL: ?
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LEL: ?
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Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
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Incompatibilities & Reactivities
Strong oxidizers such as sulfuryl chloride or potassium permanganate
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Measurement Methods
NIOSH 2534
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact (>0.1%)
Eyes: Prevent eye contact
Wash skin: When contaminated (>0.1%)
Remove: When wet or contaminated (>0.1%)
Change: Daily
Provide: Quick drench (>0.1%)
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 0.75 mg/m3:
(APF = 10) Any supplied-air respirator
Up to 1.875 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 3.75 mg/m3:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 40 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 (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Insomnia, bad dreams, restlessness, anxious; hypotension; nausea, anorexia; delirium, mania, convulsions; coma
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Target Organs
central nervous system, cardiovascular system, kidneys
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See also: INTRODUCTION
See ICSC CARD: 0200 See MEDICAL TESTS: 0225
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