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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Reference
Reference Type:
review article or handbook
Title:
CRC Handbook of chemistry and physics.
Author:
Lide, D.R.
Year:
1993
Bibliographic source:
73th edition, 1992-1993, ISBN 0-8493-0473-3

Materials and methods

Principles of method if other than guideline:
No information is available on the testing protocol.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Tyrosine
EC Number:
200-460-4
EC Name:
Tyrosine
Cas Number:
60-18-4
Molecular formula:
C9H11NO3
IUPAC Name:
tyrosine

Results and discussion

Melting / freezing point
Melting / freezing pt.:
> 342 - < 344 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
344 °C
Sublimation:
no

Applicant's summary and conclusion

Conclusions:
The melting point was 342-344°C and the substance decomposes.
Executive summary:

The melting point is reported in a well-known and reliable handbook. No information on the method is available.

The melting point is reported to be 342 - 344°C.