HSPiP testing to determine the dissolution criteria of the target soil of Mobil DTE Oil Medium and subsequently identify potential alternative solvents to Methylene Chloride.
Dexmet Corp - CT
Date Run:
11/07/2025
Experiment Procedure:
Hansen Solubility Parameters in Practice (HSPiP) was employed for this alternatives assessment process. A soil immersion test was performed to identify the HSP parameters of the target soil; Mobil DTE Oil Medium. 1 ml of Mobil DTE Oil Medium was added to each of 24 10 ml vials consisting of the 24 panel solvents. The full list of solvents is available in the results section. These scintillation vials were then placed on a vial roller for the purposes of mechanical agitation.
Dissolution was evaluated by two criteria: first, if the oil was able to be emulsified within the solvent and secondly, if the clearness and colorlessness of the solvent was maintained. If the soil was not visually identifiable in the vial based on color, shape, particulate, present oil slick appearance, or filming, the soil was then considered satisfactorily dissolved.
Once the HSP parameters of the soil were identified, alternative solvents were chosen based on having similar HSP parameters supporting the likelihood of effective dissolution of the Mobil DTE Oil Medium.
Trial Results:
Table 1 lists the dissolution results of each of the 24 panel solvents. The dissolution criteria was 0=less than 90% dissolution and 1=dissolution greater than 90%.
Solvent
CAS
Dissolution
Toluene
108-88-3
1
Dimethyl Carbonate
616-38-6
0
Xylenes
108-38-3
1
Benzyl Alcohol
100-51-6
0
Ethylene Glycol
107-21-1
0
Methyl Acetate
79-20-9
0
Undecane
1120-21-4
1
Ethyl Lactate
97-64-3
0
Acetone
67-64-1
0
Ethyl Acetate
141-78-6
1
Methanol
67-56-1
0
Ethanol
64-17-5
0
1,3-Dioxolane
646-06-0
0
Diethyl Carbonate
105-58-8
0
1-Propanol
71-23-8
1
Isopropanol
67-63-0
0
Propylene Carbonate
108-32-7
0
Thiophene
110-02-1
1
1-Methoxy-2-Propanol
107-98-2
0
Dimethyl Sulfoxide
67-68-5
0
1-Butanol
71-36-3
1
Dimethyl Glutarate
119-40-0
1
Anisole
100-66-3
1
2-Butoxyethyl-Acetate
112-07-2
1
Table 2 shows the HSP values of the target soil, Mobil DTE Oil Medium, determined in the HSPiP analysis.
Target _dD
Target _dP
Target _dH
Mobil DTE Oil Medium
15.8
0.2
8.7
Table 3 lists the alternative solvents identified that are likely to have the ability to fully dissolve Mobil DTE Oil Medium.
Solvent
CAS
_dD
_dP
_dH
Tert-Pentyl-Alcohol
75-85-4
15.61
5.04
9.76
3_Pentanol
584-02-1
15.73
5.56
11.18
(R )-(-)-2-Butanol
14898-79-4
15.65
5.76
12.29
(S )-(+)-2-Butanol
4221-99-2
15.65
5.76
12.29
2-Butanol (Racemic)
15892-23-6
15.65
5.76
12.29
3-Methyl-2-Butanol
598-75-4
15.62
5.12
10.49
Methyl Isopropenyl Ketone
814-78-8
15.95
6.85
4.78
3-Hexanone
589-38-8
15.74
6.68
4.08
Pyridine
110-86-1
18.89
7.53
6.85
3,3-Dimethoxy-1-Propene
6044-68-4
15.44
5.11
4.64
Isobutyl Acetate
110-19-0
15.58
4.47
5.59
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
Conclusion:
Next Steps:
Benchmark performance testing of the identified solvents in removing Mobil DTE Oi Medium from provided sample parts of various substrates.
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