TEL meaning in Chemistry ?

Answer:

What is Tetra Ethyl Lead mean?

Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula (CH3CH2)4Pb. It is a petro-fuel additive, first being mixed with gasoline beginning in the 1920s as a patented octane rating booster that allowed engine compression to be raised substantially. This in turn caused increased vehicle performance and fuel economy. TEL had been identified chemically in the mid-19th century, but its antiknock effectiveness was discovered in 1921 by the General Motors research laboratory, which had spent several years attempting to find an additive that was both highly effective and inexpensive.

Concerns were later raised over the toxic effects of lead, especially on children. Lead also poisons catalytic converters and is a major cause of spark plug fouling. From the 1970s many countries began phasing out and eventually banning TEL in automotive fuel. In 2011, a study backed by the United Nations estimated that the removal of TEL had resulted in $2.4 trillion in annual benefits, and 1.2 million fewer premature deaths.

TEL is still used as an additive in some grades of aviation gasoline. Innospec has claimed to be the last firm legally making TEL, and as of 2013, TEL was being produced illegally by several companies in China. In July 2021, the sale of leaded gasoline for cars was completely phased out worldwide, prompting the United Nations Environment Programme (UNEP) to declare an "official end" of its use in cars on August 30 (although it is still available in aviation fuel for small airplanes).

reference

Full Form	Category
Tyco Electronics Ltd	Academic & Science
Technology and Engineering Literacy	Academic & Science
Thalner Electronic Laboratories	Academic & Science
The European Library	Academic & Science
Tax Expenditure Limitation	Accounts and Finance
Time Entry and Labor	Accounts and Finance
Telupid	Airport Code
Tax Exemption Letter	Business
Tokyo Electron Limited	Business
Tokyo Electron LTD.	Business
Tata Elxsi, LTD.	Business
Telecom Corporation of NZ Ltd	Business
Tetra Ethyl Lead	Chemistry
Theological Education for Leadership	Community
Tennessee Electronic Library	Community
Technology Enhanced Learning	Community
Toronto Education Link	Community
Telephony (APEC WG)	Computer and Networking
Telcoin	Cryptocurrency
Telnet Host File	File Type
tal Estate Liquidation	General
Terrorist Exclusion List	General
Tilt Equals Latitude	General
Temporary Exclusion List	General
Transporter Erector and Launcher	General
Torque Error Learning	General
Telematics	General
Top Engine Speed Limit	General
Ford Tempo l	General
Transubstantive Entity Lower	General
Tax And Expenditure Limit	Governmental
TENALI JN	Indian Railway Station
Telefon	International
telencephalon	Medical
translocation E26 leukaemia	Medical
Trust Executive Letter	Medical
Total Euphorious Laughter	Messaging
Transporter-erector-launcher (missile Platform)	Military and Defence
Transporter- Erector- Launcher	Military and Defence
Traffic Event Logger	Networking
Telephone	Telecommunication