Tetrazinc trioxide phosphite

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 January 2018 - 26 March 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Identification: RM10000077
Chemical name: Zinc oxide phosphite (CAS 64539-51-1)
Appearance/Physical state: white powder
Lot No: 1013Q17761
Purity: 62% (zinc content)
Expiry date: 25 June 2018
Storage conditions: room temperature, in the dark

Key result

Decomposition:

yes

Decomp. temp.:

>= 333 °C

Remarks on result:

not determinable

Remarks:

test item decomposed before melting

Key result

Decomposition:

yes

Decomp. temp.:

>= 301 °C

Remarks on result:

other: decomposition from 301°C when test item is dehydrated

Conclusions:

The metling point of the test item was not determined as it was determined to decompose from approximately 333 °C (606 K).
Decomposition may occur at a lower temperature of approximately 301 °C (574 K) when the test item is dehydrated.

Executive summary:

The test item decomposed from approximately 333 °C (606 K), by differential scanning calorimetry, using procedures designed to be compatible with Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. Decomposition may occur at a lower temperature of approximately 301 °C (574 K) when the test item is dehydrated. Therefore the melting point of the test item was not determined.

Description of key information

The metling point of the test item was not determined as it experienced decomposition from approximately 333 °C (606 K).