MIL-STD-1330D(SH) APPENDIX E
20 September 1996
1/ CFC-113 is the preferred solvent for cleaning gauges and instruments. HCFC-
141b is the preferred solvent for cleaning oxygen-nitrogen producers.
2/ For naval activities, the use of CFC-113 is restricted to those authorized by NAVSEA to access the mission critical reserve maintained by the Defense Logistics Agency or reserves maintained by Naval Shipyards. Refer to Navy ODS Advisories 95-01 and 96-01 for additional information. CFC-113 procured for gauge cleaning shall be equivalent to MIL-C-81302, type I. CFC-113 procured for oxygen-nitrogen producer cleaning and field wipe shall be equivalent to MIL-C-81302, type I or II. Recycled CFC-113 shall be equivalent to MIL-C-81302, type I, with the following exceptions: moisture
content shall be 35 ppm maximum; organic cleanliness shall be less than 5 ppm determined as specified in 5.13.2; and particulate cleanliness shall be as specified in 5.13.3.2.
3/ HCFC-141b in accordance with A-A-50425 is restricted to field wipe since it is delivered only as a spray can. Be advised that HCFC-141b is reported to have upper and lower explosion limits of 17.7 and 7.6 percent, respectively. When purging or drying equipment cleaned with HCFC-141b, ensure purging is performed with nitrogen and is directed to a well ventilated area free of any ignition sources. Recognize that HCFC-141b at the lower explosive level is toxic representing an immediate hazard to life. HCFC-141b has been satisfactory tested for compatibility with gaseous and liquid oxygen demonstrating no ignition or flash point.
4/ HCFC-225 or HCFC-225s is not authorized for use by any Navy uniformed or civilian personnel. Review of the health and safety aspects of HCFC-225 and HCFC-225s by the Navy Environmental Health Center concluded that the toxicity testing of the solvent is incomplete; 90-day inhalation and teratology (fetus development) testing have not been completed. Therefore, no exposure
criteria can be recommended at this time. Vendors may use the solvent at their own risk, however, its use is not authorized on board any NAVSEA vessel or facility. HCFC-225 or HCFC-225s used for cleaning as specified in this standard shall be in accordance with the following which has passed oxygen liquid and gaseous flammability testing and soil removal performance testing.
Composition (HCFC-225):
3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca)
(CAS No. 422-56-0).......................................45 ± 5%
1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb)
(CAS No. 507-55-1).......................................55 ± 5%
Composition (HCFC-225s):
3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca)
(CAS No. 422-56-0).......................................10 ± 5%
1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb)
(CAS No. 507-55-1).......................................90 ± 5%
Purity (impurities shall be other halogenated solvents)...99.90% min
Non-volatile residue.......................................5 ppm max
Acid (measured as HCl).....................................1 ppm max
Moisture..................................................20 ppm max
Appearance..............................transparent and no turbidity
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