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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January-March 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: test performed following pharmacopeia method
Qualifier:
according to guideline
Guideline:
other: USP method<651>
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Principles of method if other than guideline:
The product is introduced in a tube, containing a mercury thermometer on a height of 5 to 5.7 cm. Put the tube in a cold bath (mixture of ice, salt and acetone), having a temperature of about -12°C. The product temperature is recorded every 30 seconds until the product is frozen or until the bath temperature is reached (approximately -10°C).
GLP compliance:
no
Type of method:
other: The temperature at which a substance passes from the liquid to the solid state upon cooling is a useful index to purity if heat is liberated when the solidification takes place, provided that any impurities present dissolve in liquid and not in solid.
Specific details on test material used for the study:
Name of the test material (as cited in the study report): PROTEOL OAT
Lot / batch: LR10746
Melting / freezing pt.:
< -10 °C
Atm. press.:
1 atm
Decomposition:
no
Remarks on result:
other: The batch temperature could not reach - 20°C because of the solvant mixture used: ice, salt and acetone
Conclusions:
Freezing temperature of the substance: Glutens, hydrolyzates, reaction products with lauroyl chloride, sodium salts, is less than -10°C.
Executive summary:

test material: the liquid marketed product "Proteol OAT" which contains ca.27.5% of the solid substance "Glutens, hydrozylates, reaction products with lauroyl chloride, sodium salts".

freezing temperature: less than -10°C.

Description of key information

test material: the liquid marketed product "Proteol OAT" which contains ca.27.5% of the solid substance "Glutens, hydrozylates, reaction products with lauroyl chloride, sodium salts".

Freezing temperature is less than -10°C at 101.3 kPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-10 °C

Additional information

The study has been conducted according to pharmacopea method USP<651>.

The test item temperature is recorded until the bath temperature is reached (approximately -10°C).