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Physical & Chemical properties

Appearance / physical state / colour

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Reference
Endpoint:
appearance / physical state / colour
Type of information:
other: company data
Remarks:
qualitative assessment
Adequacy of study:
key study
Study period:
2017
Reliability:
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
Qualifier:
no guideline followed
Principles of method if other than guideline:
Within a preliminary test an applicable concentration was determined.
1 g of "Reactive Blendwell Red” 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.
Parameters:
Instrument: Perkin Elmer Lambda 25 (configured as single beam), using 1 cm path-length and UV Winlab
V:2,85,04
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
Results:
The test item “Red Blendwell" showed absorption maxima at 496. nm (figure)
GLP compliance:
no
Physical state at 20°C and 1013 hPa:
solid
Remarks:
Solid powder, the substance is isolated by spry drying
Key result
Form:
solid: particulate/powder
Colour:
dark red
Odour:
odourless
Substance type:
organic
Executive summary:

Odourless Solid dark red powder

Description of key information

Dark Red Powder Odourless

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

Dark Red Powder odourless