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EC number: 205-117-2 | CAS number: 133-66-4
Stability: thermal, sunlight, metals
Administrative data
Link to relevant study record(s)
Description of key information
Sample weight remains stable till to 320°C in air
Additional information
Thermal stability on 133-66-4 was investigated by:
1) Differential scanning calorimetry (DSC),
2) Thermogravimetric analisys (TGA).
1) DSC: sample (7-8 mg) were closed in Aluminium pan and heated from 40°C to 400°C at 10°C/minute heating rate. DSC profile shows an endotermic event from 100°C to 200°C with two maxima that is due to water desorption. From 320°C an exothermic deflection of the base line clearly indicate thermal decomposition of the optical brightener.
2) TGA: sample were heated in inert atmosphere (Nitrogen) from 40 to 850°C at 20°C heating rate. TGA loss profile confirms the water release at lower temperatures. Sample weight remains stable till to 330°C. At higher temperature a progressive weight loss is due to the sample decomposition.
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