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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Stability: thermal, sunlight, metals

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
thermal stability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: DTA Screening method
Deviations:
not specified
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Test substance thermally stable:
yes
Operating temp.:
350 °C
Sublimation:
no
Transformation products:
not specified
Test substance stable to sunlight:
not determined
Test substance stable to metals / metal ions:
not determined

The screening DTA (heating rate 3 K/min., closed glass ampule) showed the endothermic evaporation of the sample. With the addition of V4A showed from 140 ° C, a weakly exothermic oxidation reaction. Safety related exothermic reactions were not observed.

Conclusions:
Taking into account the short residence times of the substance to be evaporated from a thermal point of view, there are no objections to the conversion of the substance into the gas phase phosgenation apparatus. Residence times of more than one hour at temperatures above 300 ° C should be avoided.
Executive summary:

According to the DTA-Screening test the test substance was transferred via two micro-exchangers made of V4A at 0.6 bar and 160 ° C to 270 ° C in a gas-phase phosgenation apparatus. The first heat exchanger was used for evaporation, the second for overheating to 20 ° C to 30 ° C above the boiling point to prevent droplets safely. The maximum heating medium temperature was 350 ° C, the heating medium Marlotherm SH is separated from the product by a double barrier, so that mixing can be excluded. The screening DTA (heating rate 3 K/min., closed glass ampule) showed the endothermic evaporation of the sample. With the addition of V4A showed from 140 ° C, a weakly exothermic oxidation reaction. Safety related exothermic reactions were not observed. Taking into account the short residence times of the substance to be evaporated from a thermal point of view, there are no objections to the conversion of the test substance into the gas phase phosgenation apparatus. Residence times of more than one hour at temperatures above 300 ° C should be avoided.

Description of key information

Taking into account the short residence times of the substance to be evaporated from a thermal point of view, there are no objections to the conversion of the substance into the gas phase phosgenation apparatus. Residence times of more than one hour at temperatures above 300 ° C should be avoided.

Additional information

The screening DTA (heating rate 3 K/min., closed glass ampule) showed the endothermic evaporation of the sample. With the addition of V4A showed from 140 ° C, a weakly exothermic oxidation reaction. Safety related exothermic reactions were not observed.

Justification for classification or non-classification