Why is EM restricted when other glycol ethers are not?
Because of how it is metabolised. EM is oxidised in the body to methoxyacetic acid, and that metabolite is responsible for the testicular and developmental effects on which its classification rests. It is classified in the EU as toxic for reproduction category 1B with hazard statements H360FD and is subject to REACH restriction. Longer-chain and propylene-series ethers follow different metabolic routes and do not share the classification.
2
Can EM be absorbed through the skin?
Yes, readily, and this is a significant part of its hazard profile. Because it is absorbed through intact skin, airborne exposure limits alone do not control the risk, and skin protection is as important as ventilation. Glove material should be selected specifically against glycol ether permeation rather than assumed, since many common glove polymers break through quickly.
3
What replaces EM in a coating formulation?
Propylene glycol methyl ether, PM, is the usual substitute. It offers comparable solvency and evaporation behaviour and full water miscibility, but is metabolised by a route that does not produce an equivalent harmful acid, so it carries no reproductive toxicity classification. The substitution is well established across the coatings industry and generally requires only minor reformulation.
4
Where is EM still used?
In permitted industrial applications where no substitute performs adequately, including some semiconductor and electronics processing, specialist industrial coatings and inks, and as a chemical intermediate. Permitted-use status and any authorisation requirement must be confirmed for the specific application and destination market before supply.
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