Physical Chemistry

We have the space, equipment, installations and devices required to fulfil all physical chemistry study requirements

 

GLP accredited since 1995, our work Profile includes:

Active substances and chemicals from basic properties (e.g. melting point, vapour pressure) to studies relevant for persistence in the environment (e.g. hydrolysis, water solubility etc)

Products – Plant Protection & Biocides from transport and user risk studies (e.g. flash point, explodability etc) through to shelf life studies

Information on our physical chemistry service portfolio

 

Our services on active ingredients and chemicals include:

  • Melting point/Melting range
  • Boiling point/Boiling range
  • Density
  • Vapour pressure
  • Henry constant
  • Physical state, colour and odour
  • IR; NMR; GC/HPLC-MS; UV/VIS, ICP-MS
  • Water solubility
  • Solubility in organic solvents
  • Partition coefficient
  • Abiotic degradation
  • Particle size distribution (Laser diffraction /  sieve analysis)
    		•
  • Photometabolism
  • Phototransformation
  • Dissociation constant
  • Oxidative phototransformation in air
  • Flammability (solids)
  • Flash point (liquids) 
  • Auto-ignition temperature of liquids / of solids
  • Bowes-Cameron cage test 
  • Explosive Properties
  • Surface Tension
  • Oxidizing properties of liquids /of solids
  • Adsorption / Desorption coefficient
    		•

    Our services on Plant Protection Products include:

    General Risk AssessmentPhys Chem

    • Explodability
    • Oxidizing properties (solids)
    • Flammability (solids)
    • Auto-ignition temperatures of solids
    • UN-Bowes-Cameron-Cage test

    Physico-chemical studies of the formulation (WDG*) to be performed once:

    • Development and validation of an analytical method for the determination of the content of active ingredient in the formulation
    • Tap density
    • Flowability after heat test under pressure

    Physico-chemical studies of the formulation (WDG*) to be performed also in shelf life specification before and after storage:

    • Appearance (colour and odour) includes a statement of packing stability, content of a.i. Suspensibility
    • Content of a.i.
    • pH
    • Acidity, alkalinity
    • Wettability
    • Persistent foam
    • Dispersibility of WG
    • Suspensibility
    • Wet sieve test
    • Dry sieve analysis
    • Dustiness
    • Friability and attrition characteristics

    *The examples listed here for physical-chemical tests are those performed with one single formulation type (WDG). In reality we can perform many more physical-chemical tests - please contact our specialist for further information

    Shelf Life Specification:

    • 2 year shelf life specification at ambient temperature
    • Accelerated storage stability for 2 weeks at 54°C or other temperatures

    Further information

     

    For further information on Physical Chemistry services - please contact Dieter Walter.