The purpose of this Technical Bulletin is to alert the user community of the optional approved
alternative for P-D-680 Type II.
AMCOM Aviation Research, Development and Engineering Center (AVRDEC), Materials
Engineering and the Environmental Technology Team have identified a drop in replacement
for P-D-680 Type II for use in aviation maintenance procedures. Army Aviation maintenance
facilities may be required to limit hazardous air pollutants due to state or local regulations. This
substitute limits aromatic content in the solvent to less than 2% by volume. The use of the
substitute is not mandatory.
3. Mineral spirits ASTM D235-95 Type II Class C
a. Mineral spirits ASTM D235-95 Type II Class C is authorized as a replacement for P-D-680
Type II in aviation system maintenance procedures and documents. Mineral spirits of the
above specification has received approval for use as a drop in replacement for P-D-680
Type II in all aviation Technical Manuals (TM's) and Depot Maintenance Work
b. Mineral spirits, also known as petroleum spirits, of ASTM standard D235-95 Type II Class
C is a low odor, low residue, hydrogenated hydrocarbon solvent with an aromatic content
limited to less than 2% by volume.
c. The substitute solvent is approved for general purpose cleaning.
d. When procuring, the solvent must be specified by the standard it complies with (ASTM
D235-95 Type II Class C) and the CAS number (64742-47-8). The product should not be
purchased solely by specifying NSN since all classes of Type II mineral spirits and P-D-680
solvents carry the same NSN.
e. Other mineral spirits and petroleum-based solvents marketed under various trade names are
acceptable provided their quality is consistent with the ASTM D235-95 Type II Class C
f. Reclaimed or closed-loop recycled mineral spirits or other petroleum-based cleaning
solvents are also acceptable provided their quality is consistent with the ASTM D235-95
Type II Class C and the total chlorine content does not exceed 100 ppm (maximum), if any.