Re: Glycol Ether Substitute

Wayne Pferdehirt (
Tue, 16 Apr 1996 11:23:44 CST

From: "Wayne Pferdehirt" <>

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I know that the suppliers to the wood furniture coatings industry were
confident that propylene glycol could be substituted for more toxic
ethylene glycol ethers, albeit at a higher cost. For purposes of TRI
reporting, the definition of glycol ethers is as follows:

R-(OCH2CH2)n-OR' (please note that the 2's and n should be shown as

n = 1,2, or 3
R = alkyl C7 or less or R = phenyl or alkyl substituted phenyl
R'= H or alkyl C7 or less; or OR' consisting of carboxylic acid
ester, sulfate, phosphate, nitrate, or sulfonate

What does this mean? Ask someone else. Propylene glycol ethers do
not meet this definition and are therefore not subject to TRI

Ethylene glycol ethers are considered Hazardous Air Pollutants under
Section 112 of the CAAA. These include: 2-propoxy-ethanol (CAS#
2807309), 2-butoxy-ethanol (111762), ethoxyethoxy ethanol (111900),
butoxyethoxy ethanol (112345), methoxycarbitol (111773), methyl
cellosolve (109864), 2-ethoxyethanol (110805), hexyl cellosolve
(112254), and ethylene glycol (107211).

Propylene glycol ethers are NOT considered HAPs. These include:
1-methoxy-2-propanol (CAS# 107982), n-propoxypropanol (1569013),
methoxy-methoxy ethoxy propanol (345948), and n-butoxypropanol

Other glycols that are NOT HAPS include: diethylene glycol (111466),
dipropylene glycol (25265718), and propylene glycol (57556).

David Williams



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