TRICHLOROETHANE- ▸ Metal cleaning: Solvent and degreasing agent for metal parts
- ▸ Solvent: Solvent for resins, oils, waxes, tar, and adhesives
- ▸ Chemical intermediate: Feedstock in chlorinated-chemical production
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
⚠ WARNING: This product can expose you to 1,1,1-Trichloroethane, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
1,1,1-Trichloroethane (CAS 71-55-6, C2H3Cl3), also called methyl chloroform, is a chlorinated solvent historically used for metal degreasing and cleaning, as a solvent for resins, oils, waxes, and adhesives, and as a chemical intermediate. It is an ozone-depleting substance whose production has been phased out under the Montreal Protocol.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 200-756-3
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
1,1,1-Trichloroethane (Methyl Chloroform) (CAS 71-55-6) appears on the regulatory list(s) below. This is public regulatory information about the substance — not a statement about any specific supplier’s material, and not a safety claim. Confirm the current status for your jurisdiction and intended use.
- California Proposition 65: listed for cancer, listed 21 Apr 2023. A California Proposition 65 warning applies (see the warning above).
Sources: ECHA Candidate List / Annex XIV / Annex XVII (echa.europa.eu); U.S. EPA TSCA; UN Stockholm Convention / EU POPs Regulation; California OEHHA Proposition 65 list. Retrieved 2026-07-13.
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Solvents for Vapor Degreasing & Precision Cleaning (Industrial Manufacturing)
Frequently Asked Questions
What is trichloroethane used for?
1,1,1-Trichloroethane (TCA, CAS 71-55-6) was used historically as a chlorinated solvent for metal degreasing and parts cleaning, as a solvent for resins, oils, waxes, tar, and adhesives, and as a chemical intermediate in chlorinated-chemical production.
Why was trichloroethane discontinued?
1,1,1-Trichloroethane is an ozone-depleting substance, and its production was phased out under the Montreal Protocol. This regulatory phase-out, not any change in solvent performance, is why it was discontinued for general use.
What is the difference between trichloroethane and trichloroethylene?
They are distinct chemicals: 1,1,1-trichloroethane (C2H3Cl3, CAS 71-55-6, also called methyl chloroform) is a saturated chlorinated ethane, while trichloroethylene (C2HCl3) is an unsaturated chlorinated ethene. They differ in structure, CAS number, and solvent behavior despite similar names.
What is the common name and formula of trichloroethane?
1,1,1-Trichloroethane is also called methyl chloroform. Its molecular formula is C2H3Cl3 and its CAS number is 71-55-6, classified under HS code 2903.19 (saturated chlorinated derivatives of acyclic hydrocarbons).
How is trichloroethane shipped and classified for transport?
1,1,1-Trichloroethane ships under UN 2831. RawSource provides the current SDS and CoA with each order; consult those documents and applicable DOT/IMDG requirements for packaging, labeling, and handling. Contact us for a bulk quote and documentation.
What is the REACH and TSCA regulatory status of 1,1,1-Trichloroethane (Methyl Chloroform)?
1,1,1-Trichloroethane (Methyl Chloroform) (CAS 71-55-6) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 200-756-3).