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Substance Identity - Sameness

A Substance Identity under REACH (also referred to as “Sameness”) is comparable to a fingerprint of the substance. By using suitable spectroscopic and analytical methods, it is possible to unequivocally describe a chemical substance and assign it to a CAS or EN number.

The information requirements to be submitted for general registration purposes in this context are described in REGULATION (EC) No 1907/2006, ANNEX VI: INFORMATION REQUIREMENTS REFERRED TO IN ARTICLE 10, Section 2.

For EU REACH, a Substance Identity is the pre-requisite for every REACH registration. And there is a Substance Information Exchange Forum (SIEF) that enables registrants of the same substance to share the collected data for a joint registration. With your Substance Identity you are entitled to receive a "Letter of Access" (LoA) in order to join the SIEF. This process is comparable for chemicals legislation worldwide:

  • China REACH
  • Korea: AREC („Act on the Registration and Evaluation of Chemical Substances“), K-REACH
  • Türkiye: KKDIK, Türkiye REACH
  • United Kingdom: UK REACH

LAUS is specialized in Substance Identity Profiles for substances of any kind:

- Organic mono-constituents

- Inorganic salts, oxides, alloys, elements

- Gases

- Organic multi-constituents

- Pigments/dyes

- UVCBs (unknown or variable composition, complex reaction products or biological materials)

- Reaction masses

- Mixtures

- Waxes and oils

- Nanomaterials

Sameness Package

Our experts offer to put together a package with all relevant analyses in order to unequivocal identify your substance. You will receive a report for submission to ECHA. For most substances the following analyses are applicable:

  • UV/VIS at 3 pH-values
  • FTIR
  • XRD
  • XRF
  • 1H-NMR/13C-NMR/solid NMR
  • HPLC and GC with MS
  • ICP-OES and ICP-MS
  • Titration
  • GPC
  • Water content (gravimetric, Karl Fischer, freeze drying)

For some substance groups (paraffines, waxes and such) special analytical methods are available.

For the full characterization of nanomaterials and a complete Substance Identity Profile for example we use additional techniques:

Methods for the Characterization of Nanomaterials and Nanoforms

  • TEM (Transmission Electron Microscopy) and/or SEM (Scanning Electron Microscopy)
  • PSD (Particle Size Distribution) using Laser Diffraction
    and DLS (Dynamic Light Scattering)
    - for solids: freefall shaft (dry dispersion)
    - for liquids: wet dispersion
    - for aerosols: pump systems and aerosols under pressure
  • FTIR
  • XRF
  • ICP-MS
  • XRD: X-ray diffraction
    Characterization of amorphous Nanoforms including quantification by Rietveld method
  • BET (Brunauer–Emmett–Teller)
    Determination of specific surface by gas adsorption
  • Zeta Potential
  • Moisture and water: gravimetric method for solids and/or with Karl-Fischer method for liquids
  • 1H-NMR/13C-NMR

Contact us for a tailor-made quotation!

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