Opteon™ SF79
Specialty Fluid

Next Generation Low GWP Precision Cleaning Fluid

Technical Information
Introduction
Opteon™ SF79* specialty fluid is designed to meet the highsolvency needs in the industrial cleaning market. Opteon™
SF79 is a safe, nonflammable, and environmentally friendly
solvent with low global warming potential (GWP) (<15),
which are all highly desirable in industrial cleaning
applications like vapor degreasing.
Opteon™ SF79 is a blend of proprietary fluids and trans-1,2-dichloroethylene (t-DCE) with azeotrope-like properties.
Its exceptional solvency power (Kb value = 103) makes it
an ideal candidate for replacement of trichloroethylene(TCE), n-propyl bromide (nPB), benzene, perchloroethylene,
methylene chloride, and other strong solvency fluids, wheremaximum cleaning power is a requirement. Opteon™ SF79
is also a great replacement option for solvents with low to
medium solvency power, such as HCFC-225, HCFC-141b,• Fast drying with an optimum boiling point (47 °C[117 °F]), allows cleaned parts to be processed andused immediately• High soil loading capacity boosts productivity by
reducing equipment downtime associated with solvent
change-outs• Product maintains compositional stability during use(azeotropic-like mixture)• Maintenance free: No stabilizer maintenance required,easy to maintain and use• In general, existing vapor degreasing equipment can beused with minor or no modifications (see Opteon™ SF79
Retrofit Guidelines)• No surfactants needed: Removes extra washing steps toachieve residue-free cleaning• Recyclable and reusable: Reduces cost of ownership andenvironmental footprint

HFEs, PFCs, CFCs, and aqueous cleaners.

• Nonflammable

Opteon™ SF79 has the ability to clean a wide range of• Low odor and toxicity

contaminants. The fluid features high solvency and low• Excellent environmental profile: Low GWP (<15)

surface tension, which can improve the efficiency of a vapor
degreaser. Opteon™ SF79 is easy to use and provides

Typical Applications

reliability with hassle-free maintenance.

• Oil and grease removal

Features and Benefits• Precision cleaning• Superior cleaning performance with best solvency• High solvency defluxing

power in its class (Kb value = 103)

• Silicone removal• Vapor degreasing• Cold cleaning*Formerly Opteon™ Sion

Opteon™ SF79

Specialty Fluid

Table 1. Physical Properties
Property

Units

Opteon™ SF79

CFC-113

HCFC-141b

Novec 72DE

HCFC-225
ca/cb

TCE

Perc

°C

47

48

32

43

54

87

121

71

°F

117

118

90

109

129

188

250

160

g/cm3

1.29

1.56

1.23

1.28

1.55

1.46

1.62

1.35

lb/gal

10.7

13

10.3

10.7

12.9

12.1

13.5

11.3

kg/m3

1.81

3.47

3.83

4.5

5.7

4.24

lb/ft3

0.11

0.21

0.23

dyn/cm21

17.3

Boiling Point
Liquid Density(1)Saturated Vapor Density(1)Surface Tension(1)Heat of Vaporization at Boiling Point

N.D.(2)

0.27

0.35

0.26

19.3

19

16.2

29.5

29.5

25.9
20.0

kPa

44.7

44.1

79.5

46.7

38.7

8.0

2.4

6.5

6.4

11.5

6.8

5.6

1.2

0.35

2.9

cP

0.42

0.68

0.43

0.45

0.59

0.49

0.75

0.49

mW/m·K

128

72.3

90.6

N.D.(2)

N.D.(2)115.9

N.D.(2)

N.D.(2)

kJ/kg·°C

1.069

1.079

1.0996

1.046

0.962

0.855

1.103

Btu/lb·°F

0.26

0.26

0.27

0.25

0.23

0.21

0.27kJ/kg

280147

223

218

145

236

2102461033156523112990125

Viscosity(1)Heat Capacity(1)N.D.(2)psia

Vapor Pressure(1)Liquid Thermal Conductivity(1)nPB

Kb Value

N.D.(2)

Values reported are at 25 °C (77 °F), unless otherwise specified. N.D. refers to no reference data available. All data compiled was furnished from publicly available sources.

(1)

(2)

Performance Evaluations

Solubility

Opteon™ SF79 was evaluated for performance using

Opteon™ SF79 has the highest cleaning power of any

typical coupon cleaning tests according to ASTM G122.

cleaning fluid in its class as measured by the Kb value (KbBelow are examples of the results from performancevalue = 103). The Kb value is determined by ASTM D1133

evaluations. Contact Chemours to initiate a cleaning trial in

and is a well-known measurement of solvency strength. In

one of our regional cleaning laboratories or obtain ageneral, the higher the Kb value, the greater the cleaning

sample for on-site testing.

power. The solubility of Opteon™ SF79 for various

Table 2. Performance Evaluations of Opteon™ SF79
Contamination Level(mg/cm2)% Contamination Removed(avg. of 3 trials)

Mineral Oil

2100

Hydraulic Fluid(MIL-PRF-83282)

3.29

100

Grease(MIL-PRF-81322)

16.27

100

Opteon™ SF79 was evaluated for cleaning fluxes/residues

contaminants is shown in Table 3.
Table 3. Solubility of Various Contaminants in Opteon™ SF79
ContaminantSolubility

MineralMiscible

Hydraulic Fluid (MIL-PRF-83282)

Miscible

Grease (MIL-PRF-81322)

Miscible

Silicone (DC-704)

Miscible

Skydrol

Miscibleand found effective in cleaning non-polar flux rosin residues

Materials Compatibility

from surface mounted technology printed circuit boards.

Opteon™ SF79 is characterized by good compatibility with awide selection of metals, including stainless steel, copper,ug NaCl/in2

RMA Residue Removal

20
151050brass, and aluminum, after exposure for 2 weeks at 47 °C(117 °F) in sealed tubes per ASTM D5642. Opteon™ SF79
is compatible with these plastics and elastomers: Teflon™
PTFE, FEP, PFA, polyethylene, polypropylene, nylon, Kynar,Ryton, Halar, and Kalrez. Examples of incompatible plastics

SF79

HFE72DA
Products

HFE72DE

include PMMA, ABS, polycarbonate, and polystyrene. Mostelastomers, including Viton™, natural rubber, EPDM, silicone,and Hypalon, show reversible swelling when exposed toOpteon™ SF79. Teflon™ or Teflon™ encapsulated gaskets andO-ring seals are recommended for diaphragm pumps.
Individual plastic and elastomeric formulations can vary withOpteon™ SF79

Specialty Fluid

the manufacturer; therefore, the best assurance of material

Table 5. Safety, Toxicity, and Environmental Properties

compatibility can be recommended after testing underPropertyUnits

Opteon™ SF79

conditions expected during normal operation. Contact yourFlash Point, CC, ASTM D56°C (°F)

None

Flash Point, OC, ASTM D1310°C (°F)

None

Vapor Flammability Limitsvol%7.25–15.25
Negligible

local technical representative for specific material
compatibility concerns.
Table 4. Plastics/Elastomers Compatibility
Plastics
Compatible

Elastomers
Incompatible

Compatible

Polyethylene

Polystyrene

Teflon™

Silicone

Polypropylene

Polycarbonate

KalrezHypalonOzone Depletion Potential–

Global Warming Potential–<15

Volatile Organic Compounds (VOCs)

g/L

1278

Occupational Exposure Limit, 8-hr TWA

ppm201

Incompatible

Teflon™

ABS

RytonEPDM Rubber

Polyester

Polyacrylate

PTFE w/EPDM

Viton™

Nylon

Acrylic (PMMA)

PTFE w/Neoprene

Buna N

FEP/PFA

Polysulfone

Parafluor

Fluorosilicone

Storage and HandlingOpteon™ SF79 is thermally stable and does not oxidize or
degrade during storage. It is recommended to store
containers in a clean and dry area, and protect them fromfreezing and excessive temperatures of 46 °C (115 °F).

Halar

When stored properly, an unopened package has no shelf

Kynar

life. Package sizes for Opteon™ SF79 are 20 kg (5.28 gal)

Safety, Toxicity, and Environmental

metal pail and 227 kg (60 gal) steel drum.

Opteon™ SF79 exhibits no closed or open cup flash point
and is classified as a nonflammable liquid by NFPA andDOT. The product is volatile; vapor may become
flammable when mixed with air in the concentrations
shown below. Flash point data and vapor flammability
limits in air are shown in Table 5.

For additional information on Opteon™ SF79 or other specialty fluids products by Chemours, please visit opteon.com or call 800-969-4758.
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
risk. Because conditions of use are outside our control, Chemours makes no warranties, expressed or implied, and assumes no liability in connection with any use of this information. Nothingherein is to be taken as a license to operate under, or a recommendation to infringe, any patents or patent applications.
© 2019 The Chemours Company FC, LLC. Opteon™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
Replaces: K-26431-3
C-10766 (3/19)