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No. 2
Substitute Liquids for DOP
Customers concerned with potential health
problems to people working with Di [2-ethyhexyl] phthalate
(aka DOP or DEHP) have inquired about acceptable substitute
liquids for DOP. As a manufacturer of test equipment, ATI
does not have the authority to dictate which substitutes can
be used. However, ATI recommends, in order of preference,
the following substitute liquids:
In January 1992 the Army Surgeon General's
office gave its approval for the use of PAO in lieu of DOP for U.S.
Army filter test equipment. Because of this approval, ATI
has placed PAO at the top of its recommended list of substitutes.
ATI has performed several studies on the
various substitute liquids and found no significant difference
in aerosol distribution. However, tests revealed that for
the same generator pressures, different concentration values where achieved depending on the substance used. This should be taken into
account if a photometer's reference feature is calibrated for a liquid other than
the one in being used.
Many ATI customers who selected corn oil as an alternate
liquid consequently encountered maintenance difficulties.
Many of these customers are now switching to PAO which, in
ATI's estimation, is the best substitute from a maintenance
and operational point of view. The second most popular choice
has been mineral oil and customer feedback indicates few maintenance
problems.
Related Technical Bulletins:
No. 16 - PAO (Emery 3004) Liquid
No. 20 - More Emery vs. DOP (Follow-up
to Technical Bulletin # 16)
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