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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Diss Factsheets

Physical & Chemical properties

Appearance / physical state / colour

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Administrative data

Link to relevant study record(s)

appearance / physical state / colour
Type of information:
other: Company data
qualitative assessment
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Appearance, physical state and colour at 25°C have been qualitative assessed by visual estimation of many samples, confirmed by all users and confirmed by melting and boiling point measurements for physical state
no guideline followed
Principles of method if other than guideline:
Qualitative assessment

Within a preliminary test an applicable concentration was determined.
1 g of "Reactive Blendwell Orange” was weighed into a 250 ml measuring flask and dissolved with demineralized
water (DW) to prepare the stock solution. Afterwards the stock solution was diluted: 4ml + 496 ml of DW.
The solutions and bind solution were tempered at 20°C. After reaching the auto zero, a single beam photometer Perkin Elmer Lambda 25 was used for the measurement.
A first measure with the cell filled up with the corresponding blank solution (DW) was done to establish the base line.
After that, a second measure with the sample solution was also done.
Instrument: Perkin Elmer Lambda 25 (configured as single beam), using 1 cm path-length and UV Winlab
Solvent: demineralized water
Range: 380 nm - 740 nm
Scan speed: 240 nm/ min
Wavelength interval: 1 nm
Ordinate type: A
Slit: 1 nm
Smooth: 2 nm
Path length: 1 cm
Testing temperature: 20 °C
The test item “Orange Blendwell" showed absorption maxima at 418. nm (figure)

GLP compliance:
Physical state at 20°C and 1013 hPa:
solid powder
Key result
solid: particulate/powder
dark orange
Substance type:
The substance is solid dark orange powder odourless
Executive summary:

The substance is solid dark orange powder odourless

Description of key information

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:

Additional information

the substance is solid dark orange powder odourless