HP 152aAerosol Propellant

Physical Properties of HP 152a and n-Butane Mixtures

Technical Information
For the full range of HP 152a/B compositions, thisFigure 1. Saturated Vapor Pressure of HP 152/B at 70°F—

bulletin presents the saturated vapor pressures andExperimental Dataliquid densities from 70°F to 130°F (21.1°C to 54.4°C)

90and flammability data for the vapor mixtures in air.

80

The saturated vapor pressure data for HP 152a/B are shown

Data Sources
This Study
Ref. 1
Ref. 1in Figures 1–4 and Table 1. The graphs are based on onliterature data for the pure components (Ref. 1) and on the70

show the saturated vapor pressures for the HP 152a/B
blends at 70°F and 130°F, reveal that HP 152a and butane
form an azeotropic mixture containing 82 weight percent HP
152a at 70°F and 88 weight percent HP 152a at 130°F.
Figure 5 and Table 2 show the liquid densities that werePressure, psia

experimental data given in Table 1. Figures 1 and 2, which
60

5040

calculated from pure component data (Ref. 1). The
flammability of HP 152a/B vapor mixtures in air is shown in30

Figure 6 and Table 3. These data are based on literature
values for the pure components (Ref. 2 and 3) andexperimental values for a 50/50 mole percent(53.25/46.75 wt %) HP 152a/B mixture.

References
1. ASHRAE, Handbook of Fundamentals, 1972.
2. Bulletin 503, Bureau of Mines, “Limits of Flammability ofGases and Vapors”.
3. Handbook of Aerosol Technology, P.A. Sanders, Van
Nostrand Reinhold Company, 1979.

200204060

HP 152a in Mixture, wt %80100

HP 152aAerosol Propellant

Figure 2. Saturated Vapor Pressure of HP 152/B atFigure 4. Saturated Vapor Pressures of HP 152/B Mixtures

130°F—Experimental Data
300

200Data Sources
This StudyRef. 1Ref. 1

200Pressure, psia

Pressure, psia

160

140120100908070HP 152a, wt %18080
100605040302010080020406080

100

100102030405060

70Temperature, °CHP 152a in Mixture, wt %Figure 3. Saturated Vapor Pressures of HP 152/B Mixtures
300

7050403020200

10Note: Data based on pure component data plus shown experimental points (•)
Note: A 70 and 90 wt % HP 152 line falls at or just below the 80 wt % line. A 70 wt %HP 152 mixture has a pressure of 40.4 psia at 0°C and 270.1 psia at 70°C. A 90 wt %mixture has a pressure of 40.2 psia at 0°C and 279.1 psia at 70°C. The azeotropic
mixtures contain 82 wt % HP 152 at 70°F and 88 wt % at 130°F.

0Experimental Data

100908070HP 152a, wt %Pressure, psia

Table 1. Saturated Vapor Pressures of HP 152/B Mixtures—

6050
4077°F (25°C)

130°F (54.4°C)

0*

31.2

80.8

15.0

54.4

126.7

33.0

67.3

156.7

50.073.7175.5

67.0

78.3

187.8

80.0

79.9

194.0

90.0

79.5

194.9

100.0*

77.2

191.5

30

20

100

102030

40

50

60

70

Temperature, °C

Note: Data based on pure component data plus shown experimental points (•)
Note: An 80 wt % HP 152 line falls at or just below the 70 wt % line. An 80 wt % mixture
has a pressure of 40.7 psia at 0°C and 276.7 psia at 70°C. The azeotropic mixture
contains 82 wt % HP 152 at 70°F and 88 wt % HP 152 at 130°F.

Pressure, psia

HP 152 in Propellant
Mixture, wt %*Ref. 1

HP 152aAerosol Propellant

Figure 5. Liquid Densities of HP 152/B Mixtures

Figure 6. Flammability Limits of HP 152/B Mixtures

0.95

This Study
Ref. 3
Ref. 2HP 152/B Mixture Vapors in Air, volume %

0.90
0.85

Density, g/cc

0.80
0.75
°F

0.70

70

F0°

100.65°F0130.60

Flammable
Zone

0.55
0.50

0204060
HP 152a, wt %80

0100

20406080
HP 152a in HP 152a/B Mixture, wt %100Note: Data calculated from pure-component densities.

Table 2. Calculated Liquid Densities of HP152/B Mixtures

Concentration of HP 152 in
HP 152/B Mixture

Densities, g/cc at

HP 152 inMixture, wt %70°F

100°F

130°F

0*0.5775

0.55800.5370200.6229

0.60070.5764400.6761

0.65040.622160

0.73930.70920.6756800.8154

0.77960.7393100*

Table 3. Flammability Limits of HP 152/B Vapor Mixtures in Air

0.90900.86550.8161

Weight, %Mole, %Lower

Upper

0.0a

0.0

1.9

8.5

53.25

50.0

2.7 ± 0.1

9.7 ± 0.1

100.0

100.0

3.9

16.9baFlammability Limits in Air, vol %Ref. 2Ref. 3b*Ref. 1

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