Dipropylene glycol (SIDS)

OECD SIDS
3. ENVIRONMENTAL FATE AND PATHWAYS
DIPROPYLENE GLYCOLE
3.1 STABILITY
3.1.1 PHOTODEGRADATION
(a)
Type: Air [ X ]; Water [ ]; Soil [ ]; Other [ ]
Light source: Sun light [ ]; Xenon lamp [ ]; Other [ X ]
Light spectrum:
Relative intensity:
Concentration of Substance: molecule/cm3
Temperature:
Direct photolysis:
Half life:
Degradation:
Quantum yield:
13 hours
Method: calculated [ ]; measured [ ]
Other
GLP: Yes [ ] No [ ] ? [ x ]
Test substance:
Remarks:
Result:
The rate constant for the reaction of DPG with photochemically induced
OH radicals was calculated by a mathematical model (AOP) to a value of
29.7 x 10 -11 cm 3 /molecule x sec at a temperature of 25 degrees C. This
results in an atmospheric half life of ca. 13 hours at an atmospheric
concentration of 5 x 10 5 OH radicals per cm 3 .
Reference:
AOP (1992): Atmospheric Oxidation Program, Version 1.5. An
Adaptation of the Atkinson Estimation Methodology, Syracuse Research
Corporation, Syracuse.
Type: Air [ ]; Water [X]; Soil [ ]; Other [ ]
Rel. Intens. .. based on Intensity of Sunlight
Spectrum of Substance
lambda (max) nm epsilon (max)
Test condition:
Rate Constant cm 3 /(molecule*sec)
GLP: no data
Rate constant:
Remark:
Reference:
3.1.2 STABILITY IN WATER
According to the V-spectrum of DPG (i.e., no relevant UV absorption
above 290 nm) only a minimal tendency for direct photolysis can be
expected.
BUA report (1994): Dipropylenglykol.
Remark:
Ethers and glycols are generally regarded as resistant towards hydrolysis.
Therefore, DPG is not expected to undergo hydrolysis under
environmentally relevant conditions.
Reference: Lyman, W.J. (1982); Adsorption coefficient for soils and sediments.
Lyman W.J.; Reehl, W.F.; Rosenblatt, D.H. (publisher): Handbook of
chemical property estimation methods. Environmental behavior of
Organic Compounds, New York, McGraw-Hill, 4.1 - 4.33.
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