EMG Series - Water-based Ferrofluid 
Type: EMG 304
Ferrotec’s  EMG 304 Ferrofluid is a member of Ferrotec’s family of EMG Series - Water-based ferrofluids. Unlike Ferrotec’s APG series of ferrofluids that have been optimized for audio speaker applications, Ferrotec’s EMG Series ferrofluids address a broad range of application requirements and can be used for experimentation and application development. Ferrotec’s water-based EMG Series are typically used in applications where rapid evaporation or the ability to mix ferrofluid into a water-based system is required. EMG 304 ferrofluid is Black-brown fluid and uses Anionic surfactant.
EMG 304 Specifications and Physical Properties
    
      | Appearance | Black-brown fluid | 
    
      | Carrier Liquid | Water | 
      | Nominal Particle Diameter | 10 nm | 
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      |  | CGS Units | SI Units | 
   
    
      | Saturation Magnetization (Ms) | 275 Gauss | 27.5 mT | 
    
      | Viscosity @27°C | <10 cP | <10 mPa·s | 
    
      | Density @25°C | 1.24 g/cc | 1.24 103 kg/m3 | 
    
      | Initial Magnetic Susceptibility | 0.40 | 5.03 | 
    
      | Magnetic Particle Concentration | 4.5 % vol. | 
    
      | pH | 7 | 
    
      | Nature of Surfactant | Anionic |