Zinc di(benzimidazol-2-yl) disulphide

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:

2017-11-21 to 2017-11-22

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted July 27, 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

31 May 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

March 1998

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary method

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and batch No. of test material: OUCHI SHINKO CHEMICAL INDUSTRIAL CO., LTD.; 608011
- Expiration date of the lot/batch: 2017-08-31

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Keep to the storeroom with suitable ventilation. Avoid fire, direct sunlight and moisture. Store at room temperature.

Key result

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

> 270 °C

Sublimation:

no

Remarks on result:

not determinable

Table 1 Preliminary test

Start temperature °C	Heating rate °C/min	End temperature °C	Melting point °C	Observations
25	10	375	-	The test item remained solid, its color became light brown.
25	10	375	-	The test item remained solid, its color became light brown.
25	10	375	-	The test item remained solid, its color became light brown.

Table 2 Supplementary test

Temperature, °C	Observation
250-260	no change was observed
270-275	the test item remained solid, its color became slightly yellow
280-290	the test item remained solid, its color became light yellow
300-375	the test item remained solid, its color became light brown

Conclusions:

A melting point of the test substance was not detected. Based on the visual observation of the change of color, the test item is regarded to decompose above 270 °C.

Executive summary:

The melting point of the test substance was determined according to OECD guideline 102 (TOXI-COOP, 2017). For the determination of the melting point the capillary method was used. A small amount of the test item was heated in the electronic controlled sample block and the temperature in the sample block was displayed. The melting point was detected based on thermo-optical changes, while raising the temperature. Using a linear heating rate, no melting of the test substance was observed up to 375 °C. Based on the visual observation of the change of color, the test item decomposes above 270 °C.

Description of key information

A melting point of the test substance was not detected. Based on the visual observation of the change of color, the test item is regarded to decompose above 270 °C.

Additional information

The melting point of the test substance was determined according to OECD guideline 102 (TOXI-COOP, 2017). For the determination of the melting point the capillary method was used. A small amount of the test item was heated in the electronic controlled sample block and the temperature in the sample block was displayed. The melting point was detected based on thermo-optical changes, while raising the temperature. Using a linear heating rate, no melting of the test substance was observed up to 375 °C. Based on the visual observation of the change of color, the test item decomposes above 270 °C.