3

Features

The environmental profile, margin of safety, low viscosity, high molecular weight, low pour point and heat

transfer applications.

Novec 649 fluid is compatible with a wide range of materials of construction and requires no special piping or

handling systems, and is very stable in storage. Its high dielectric constant makes it safe for direct contact in

most electronics/computing applications.

Physical Properties

Properties

HFC-245fa

HFC-134a

0.0

0.0

0.0

0.0

1

23900

1030

1,300

Atmospheric Lifetime (years)

0.014

3200

7.6

140

1

World Meteorological Organization (WMO) 1998, Model-Derived Method.

2

Intergovernmental Panel on Climate Change (IPCC) 2007 Method, 100 Year ITH.

Stability

Novec 649 fluid should be used in a sealed system to prevent interaction with water. Fluoroketones like Novec 649

fluid, though reactive with liquid water (ie. a separate water phase), are remarkably stable in its absence to over

300°C. 3M’s applications engineers are available to discuss system design and trade-offs for Novec 649 fluid vs.

alternative heat transfer fluids or solutions.

Environmental, Health and Safety

Studies by a third party laboratory (Massachusetts Institute of Technology) have shown that Novec 649 fluid has an

The potential for Novec 649 fluid to impact the radiative balance in the atmosphere (i.e., climate change) is limited

by this very short atmospheric lifetime. [Using a measured IR cross-section and the method of Pinnock et.al., the

instantaneous radiative forcing for Novec 649 fluid is calculated to be 0.50 Wm-2ppbV-1.] This radiative forcing

and a 5-day atmospheric lifetime result in a GWP value of about 1 [using the WMO 1999 method over a 100-year

integration time horizon].

The photolysis of Novec 649 fluid is expected to rapidly produce fluorinated alkyl radicals similar to those produced

by other fluorochemicals. Studies of the atmospheric chemistry of these radical species and their degradation

products have concluded that they have no impact on stratospheric ozone. This combined with its very short

Before using this product, please read the current product Material Safety Data Sheet (available online or through

your 3M sales or technical service representative) and the precautions and directions for use on the product package.

Follow all applicable precautions and directions for use.

1

Photolysis and Reaction with Cl Atoms, OH Radicals and Ozone. J Phys Chem A, 2003, 107, 2674 – 2679.

Toxicity Profile

3M carefully characterizes the toxicity of new materials early in the product development process. These early

studies and the subsequent studies conducted by independent laboratories indicate that Novec 649 fluid is very low

in both acute and repeat dose toxicity. The No Observed Adverse Effect Level (NOAEL) for all endpoints of acute

toxicity is 10% (100,000 ppmV) based on a cardiac sensitization study and a 4-hour acute inhalation study. The

8-hour time weighed average (TWA) exposure guideline for Novec 649 fluid is 150 ppmV. On this basis, foreseeable

use under normal operating conditions results in a large margin of safety between anticipated exposure and the

exposure guideline.