1,1,2,2-tetrachloroethene

C2Cl4

CAS127-18-4
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
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Identification

CAS Number
127-18-4
EC Number
204-825-9
UN Number
1897
Index Number
602-028-00-4
PubChem CID
31373

Physical-chemical properties

Molecular Formula
C2Cl4
Molar Mass
165.80 g/mol
IUPAC Name
1,1,2,2-tetrachloroethene

Chemical Identifiers

InChI
InChI=1S/C2Cl4/c3-1(4)2(5)6
InChI Key
CYTYCFOTNPOANT-UHFFFAOYSA-N

Overview

1,1,2,2-tetrachloroethene (CAS 127-18-4) is a chlorinated hydrocarbon solvent with excellent degreasing properties and chemical stability. This tetrachlorinated ethylene derivative, also known as perchloroethylene or PCE, represents one of the most widely used chlorinated solvents in industrial applications. With its molecular formula C2Cl4 and molecular weight of 165.8 g/mol, tetrachloroethene exhibits exceptional solvent properties for non-polar substances, making it invaluable in various industrial processes. The compound's symmetric structure, where four chlorine atoms replace all hydrogen atoms on the ethylene backbone, contributes to its remarkable chemical stability and resistance to degradation under normal operating conditions. From a safety perspective, 1,1,2,2-tetrachloroethene requires careful handling due to its classification as a Category 2 carcinogen and chronic aquatic toxin. The substance carries GHS08 and GHS09 pictograms with a "Warning" signal word, reflecting its potential health and environmental hazards. Transportation falls under ADR Class 6.1, emphasizing the need for appropriate safety protocols during handling and storage. Industrial applications primarily focus on metal degreasing and cleaning operations, where tetrachloroethene's superior dissolving power removes oils, greases, and organic contaminants effectively. The textile industry utilizes this solvent for dry cleaning processes, while specialized cleaning applications in electronics and precision manufacturing benefit from its non-flammable nature and excellent solvency characteristics. Unlike structurally different compounds such as 1,2-diphenylguanidine used in rubber processing, tetrachloroethene serves primarily as a process solvent rather than a chemical intermediate. OYSI maintains reliable supply chains for 1,1,2,2-tetrachloroethene to support European industrial customers requiring high-quality chlorinated solvents for their manufacturing processes.

Safety & Classification

Warning
Classification:

Carc. 2; Aquatic Chronic 2

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H351

Suspected of causing cancer.

H411

Toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Transport (ADR)

UN Number1897
ADR Class6.1
Packing GroupIII
Tunnel CodeE
Proper Shipping NameTetrachlorethylen
Marine PollutantNo

Frequently Asked Questions

What is 1,1,2,2-tetrachloroethene?

1,1,2,2-tetrachloroethene is a chlorinated organic solvent with the molecular formula C2Cl4 and CAS number 127-18-4. This chemical compound has a molecular weight of 165.8 g/mol and belongs to the family of chlorinated hydrocarbons. It is classified as a Category 2 carcinogen and poses chronic aquatic toxicity risks, requiring careful handling and proper safety measures during industrial use.

What are the physicochemical properties of 1,1,2,2-tetrachloroethene?

1,1,2,2-tetrachloroethene is a colorless liquid at room temperature with a characteristic sweet, chloroform-like odor. It has high density compared to water, is practically insoluble in water but miscible with most organic solvents. The compound is non-flammable and chemically stable under normal conditions, making it suitable for various industrial solvent applications while requiring appropriate ventilation due to vapor formation.

What is 1,1,2,2-tetrachloroethene used for?

1,1,2,2-tetrachloroethene is primarily used as an industrial solvent for degreasing metal parts and cleaning applications. It serves as an intermediate in chemical synthesis and manufacturing processes, particularly in the production of other chlorinated compounds. The substance is also employed in specialized extraction processes and as a process solvent in various industrial applications where its excellent solvency properties are required.

How to handle 1,1,2,2-tetrachloroethene safely?

1,1,2,2-tetrachloroethene must be handled with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas or under local exhaust ventilation to prevent vapor inhalation. Avoid skin and eye contact, and prevent vapor accumulation. Regular health monitoring may be required due to its carcinogenic classification (Category 2) under GHS regulations.

How to store 1,1,2,2-tetrachloroethene correctly?

1,1,2,2-tetrachloroethene should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Storage areas must be equipped with appropriate containment measures to prevent environmental release. Keep containers upright and protected from physical damage. Avoid storage near incompatible materials and ensure proper labeling with GHS08 and GHS09 pictograms is maintained.

What to do in case of contact with 1,1,2,2-tetrachloroethene?

Skin contact with 1,1,2,2-tetrachloroethene requires immediate removal of contaminated clothing and thorough washing with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician and provide the safety data sheet.

How to dispose of 1,1,2,2-tetrachloroethene properly?

1,1,2,2-tetrachloroethene must be disposed of as hazardous waste through licensed waste management companies in accordance with local and EU regulations. The substance cannot be discharged to sewers or the environment due to its chronic aquatic toxicity classification. Contaminated containers and materials require special handling. Recovery or incineration at authorized facilities with appropriate emission controls is typically required for proper disposal.

How to transport 1,1,2,2-tetrachloroethene?

1,1,2,2-tetrachloroethene is classified under ADR as Class 6.1 (toxic substances), Packing Group III for transportation. Packages must bear appropriate hazard labels and comply with ADR packaging requirements. Vehicles must carry appropriate emergency equipment and documentation. Drivers require ADR training certification. Transport should follow established dangerous goods routes and emergency response procedures must be available during transit.

Is 1,1,2,2-tetrachloroethene subject to specific regulations?

1,1,2,2-tetrachloroethene is subject to REACH registration requirements and CLP classification as Carcinogen Category 2 and Aquatic Chronic 2. Users must comply with occupational exposure limits and may require authorization for certain uses. The substance is regulated under various national and EU chemicals legislation. Industrial users must implement appropriate risk management measures and may need to report usage under specific regulatory frameworks.

Where to buy 1,1,2,2-tetrachloroethene in Europe?

1,1,2,2-tetrachloroethene is available through OYSI, a European distributor of industrial chemicals. OYSI provides reliable supply across Europe with proper documentation including safety data sheets and certificates of analysis. As a specialized chemical distributor, OYSI ensures regulatory compliance and proper handling throughout the supply chain, supporting industrial customers with technical expertise and logistics for hazardous chemical products.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.