Glycol Ether TPM - Tripropylene Glycol (Mono) Methyl Ether - is a colorless, combustible liquid with low toxicity. It has very little odor and is completely soluble in water. It has excellent solvency for many polar and non-polar substances. Glycol Ether TPM has a very low vapor pressure and may not be considered a VOC under some circumstances of use. Glycol Ether TPM is a good substitute for slow evaporating ethylene glycol (E- series) ethers.