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75-74-1

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Basic Information
CAS No.: 75-74-1
Name: Tetramethyllead
Molecular Structure:
Molecular Structure of 75-74-1 (Tetramethyllead)
Formula: C4H12 Pb
Molecular Weight: 267.339
Synonyms: Lead,tetramethyl- (6CI,7CI); Tetramethyllead; Tetramethylplumbane
EINECS: 200-897-0
Density: 1.3 g/mL at 25 °C
Melting Point: -27.5 ºC
Boiling Point: 110 ºC
Flash Point: 37.7 ºC
Solubility: insoluble
Appearance: colourless liquid
Hazard Symbols: Flammable, moderate fire risk. Toxic by ingestion, inhalation, and skin absorption. Lower explosion level 1.8%. TLV: 0.15 mg(Pb)/m3. Toxic by skin absorption.
Risk Codes: 61-10-26/27/28-33-38-50/53-62
Safety: Poison by ingestion, intraperitoneal, parenteral, and intravenous routes. Moderately toxic by skin contact. An experimental teratogen. Experimental reproductive effects. Lead and its compounds have dangerous central nervous system effects. A flammable liquid and very dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard in the form of vapor when exposed to flame. May explode when heated above 90°C. Explosive reaction with tetrachlorotrifluoromethyl phosphorane. Can react vigorously with oxidizing materials. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of Pb. Used as an octane enhancer for gasoline. See also LEAD COMPOUNDS.

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Tetramethyl Lead (as Pb), 2534.

Transport Information: UN 1649
PSA: 0.00000
LogP: 1.95440
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Chemistry

TETRAMETHYL LEAD has the Molecular Formula of C4H12Pb and the Molecular Weight of 267.35.The Melting Point, Boiling Point and Flash Point are respectively -27.5 oC,110 oC and 37.7 oC.TETRAMETHYL LEAD is the  insoluble and colourless liquid.

Toxicity Data With Reference

1.   

orl-rat LD50:105 mg/kg

   MELAAD    Medicina del Lavoro. Industrial Medicine. 54 (1963),486.
2.   

ipr-rat LD50:90 mg/kg

   MELAAD    Medicina del Lavoro. Industrial Medicine. 54 (1963),486.
3.   

ivn-rat LD50:88 mg/kg

   MELAAD    Medicina del Lavoro. Industrial Medicine. 54 (1963),486.
4.   

par-rat LD50:105 mg/kg

   AOHYA3    Annals of Occupational Hygiene. 3 (1961),226.
5.   

ihl-mus LC50:8500 mg/m3/30M

   85JCAE    Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1258.
6.   

orl-rbt LDLo:24 mg/kg

   SAIGBL    Sangyo Igaku. Japanese Journal of Industrial Health. 15 (1973),3.
7.   

skn-rbt LDLo:3391 mg/kg

   SAIGBL    Sangyo Igaku. Japanese Journal of Industrial Health. 15 (1973),3.
8.   

ivn-rbt LDLo:90 mg/kg

   JPETAB    Journal of Pharmacology and Experimental Therapeutics. 38 (1930),161.

Consensus Reports

EPA Extremely Hazardous Substances List. Lead and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.

Safety Profile

Poison by ingestion, intraperitoneal, parenteral, and intravenous routes. Moderately toxic by skin contact. An experimental teratogen. Experimental reproductive effects. Lead and its compounds have dangerous central nervous system effects. A flammable liquid and very dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard in the form of vapor when exposed to flame. May explode when heated above 90°C. Explosive reaction with tetrachlorotrifluoromethyl phosphorane. Can react vigorously with oxidizing materials. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of Pb. Used as an octane enhancer for gasoline. See also LEAD COMPOUNDS.

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Tetramethyl Lead (as Pb), 2534.

Standards and Recommendations

OSHA PEL: TWA 0.075 mg(Pb)/m3 (skin)
ACGIH TLV: TWA 0.15 mg(Pb)/m3 (skin)
DFG MAK: 0.05 mg/m3

Analytical Methods

For occupational chemical analysis use NIOSH: Tetramethyl Lead (as Pb), 2534.

Specification

Moreover,there are some Hazard Symbols:flammable, moderate fire risk. TETRAMETHYL LEAD is toxic by ingestion, inhalation, and skin absorption. The lower explosion level is 1.8% and TLV is 0.15 mg(Pb)/m3.