Propylene Glycol Ether
- This has changed formulation since its inception.
- The new formula contains Dipropylene Glycol tert-Butyl Ether (DPTB) & there is limited toxicity data.
- It has not undergone formal evaluation for identification as a Toxic Air Contaminant (TAC).
Health and Environmental Impacts
Rynex 3 consists of a mixture of glycol ethers. This solvent brand has changed formulation since its inception. Based on a recent study by the National Toxicology Program (NTP) on the glycol ether ingredient of a previous formulation for Rynex, Propylene Glycol t-Butyl Ether (PGtBE), OEHHA has expressed concerns over its toxicity and carcinogenic potential. Of particular concern was the presence of tumors in mice. More detailed information on the toxicological studies for the previous formulation of Rynex can be found in the Technical Assessment Report. Rynex 3 represents the current formulation for Rynex, which does not contain PGtBE, but instead contains Dipropylene Glycol tert-Butyl Ether (DPTB). Currently there is limited toxicity data available for DPTB. It has not undergone formal evaluation for identification as a TAC.
All solvents adopted by the California OEHHA have been determined to create hazardous waste.