. MIL-M-7866C
AMENDMENT-1
10
August 1981
MILITARY SPECIFICATION
MOLYBDENUM DISULFIDE, TECHNICAL, LUBRICATION GRADE
This amendment forms a part of Mi 1itary Specification MIL-M-7866C
dated 11 July 1979, and is approved for use by all Departments and
Agencies of the Department of Defense.
PAGE 6
Paragraph 4.4.3:
Oelete and substitute:
“4.4.3 Water solubles.
A 10 g sample of the dried molybdenum disulfide
shall be weighed into an 80 by 33 ninsingle thickness thimble. The
thimble shall be placed in the extraction tube of a size B Soxhiet
extraction apparatus.
One hundred and fifty ml of water shall be added
to a previously dried and weighed 250 ml flat bottom extraction flask,
and the complete extraction apparatus assembled on an electric hotpl ate.
A blank determination shal 1 be run simultaneously. The extraction of
the powder and the blank shall be allowed to continue for 4 hours. The
tared flasks shall be placed on a steam bath and evaporated to dryness.
The flasks containing the residues shall be removed to an oven maintained
at 107 t 3°C (225 ~ 5°F) for 1 hour, then cooled in a desiccator and
weighed.
Percent water soluble matter = &-# ~ loo
Where A = Increase in weight of sample flask
B = Increase in weight of blank flask
W = Weight of dried sample”
Custodians:
Army - AR
Navy - AS
Air Force - 68
Review activities:
Army - EA, MI
DLA - GS
Preparing activity:
(Proje%ol %0-B3013)
User activities: .
Army - ME
FSC 6810
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