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Tetramethyl lead (as Pb)

Synonyms & Trade Names
Lead tetramethyl, Tetramethylplumbane, TML
CAS No.
75-74-1
RTECS No.
TP4725000
DOT ID & Guide
Formula
Pb(CH3)4
Conversion
IDLH
40 mg/m3 (as Pb)
See: 75741
Exposure Limits
NIOSH REL
: TWA 0.075 mg/m3 [skin]
OSHA PEL
: TWA 0.075 mg/m3 [skin]
Measurement Methods

NIOSH 2534
See: NMAM or OSHA Methods
Physical Description
Colorless liquid (unless dyed red, orange, or blue) with a fruity odor. [Note: Main usage is in anti-knock additives for gasoline.]
MW:
267.3
BP:
212°F (Decomposes)
FRZ:
-15°F
Sol:
0.002%
VP:
23 mmHg
IP:
8.50 eV
Sp.Gr:
2.00
Fl.P:
100°F
UEL:
?
LEL:
?
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
Strong oxidizers such as sulfuryl chloride or potassium permanganate
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
insomnia, bad dreams, restlessness, anxious; hypotension; nausea, anorexia; delirium, mania, convulsions; coma
Target Organs
central nervous system, cardiovascular system, kidneys
Personal Protection/Sanitation
(See protection codes)
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%)
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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

See also: INTRODUCTION   See ICSC CARD: 0200   See MEDICAL TESTS: 0225
 
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