Dichlorodifluoro
methane

R-12

CCl2F2

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General Characteristics Health Hazards Material Recommendations
A colorless, nonflammable, noncorrosive gas. Has an ether like odor in high concentrations. A simple asphyxiant. Normal materials can be used.
TLV-TWA Flammable Limits DOT Class / Label
1000ppm Nonflammable 2.2 / Nonflammable
Molecular Weight Specific Gravity Specific Volume
120.09 4.26 @ 70 F 3.13 cu.ft./lb @ 70 F
CGA Valve Outlet CAS Registry No. UN Number
660 75-72-9 1028
National Stock Number (NSN) Applicable to Dichlordifluoromethane MIL Specs/ Fed Specs
MSDS for Dichlorodifluoromethane


Grade
Part #
Purity Minimum Cylinder
Size
Volume
LBS
Pressure
@ 70 F
Comments
Chemically Pure
423200
99.5% Min. 454
126
056
D50
D30
1000
240
125
50
30
70.2
70.2
70.2
70.2
70.2

None


General Information: Production of R-12 was halted by the Clean Air Act on January 1, 1996. Today the remaining supplies are product which has been recovered and reclaimed back to a Chemically Pure State in accordance to ARI - 700 Standard. The ARI Standard is basically a virgin specification. Persons arguing that the supply of virgin product is still available is probably unrealistic, since most of the reserves were depleted in the 1st year.
DoD Public Law prohibits the purchase of R-12 except for existing systems, when retrofit has been determined by technical staff to be prohibitive. Senior or Executive approval of this product to be purchased is required.


LINKS


Alternatives for Retrofit of R-12

R-134a Chill-It RB-276