Diphenyl sulphide

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:

28/03/2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Justification for type of information:

Experimental result performed using standard methods of analysis.

Qualifier:

no guideline available

Principles of method if other than guideline:

The freezing point of a pure sample is the temperature at which transition from liquid to solid state takes place at atmospheric pressure.

GLP compliance:

not specified

Type of method:

method to determine freezing temperature

Remarks:

using crushed ice-salt cooling bath

Specific details on test material used for the study:

Name of test material (as cited in study report): Diphenyl sulphide
Molecular formula:C12H10S
Molecular weight:186.277 g/mol
Smiles : c1(Sc2ccccc2)ccccc1
InChI : 1S/C12H10S/c1-3-7-11(8-4-1)13-12-9-5-2-6-10-12/h1-10H
Substance Type: Organic
Physical State: Liquid

Key result

Melting / freezing pt.:

< -17.4 °C

Atm. press.:

979.6 hPa

Remarks on result:

other: other details not available

TEST DESCRIPTION AND RESULTS

Method Details		Observations	Remarks if, any
Method	Method according to Cooling Curve
Principle of Freezing point test	The freezing point of a pure sample is the temperature at which transition from liquid to solid state takes place at atmospheric pressure.
Quantity of test item used	1.0 g
Type of cooling bath used	·        Cold Water ·        Crushed Ice ·        Crushed Ice-Salt ·        Dry Ice ·        Other (specify)	Crushed Ice-Salt
Type and model no. of temperature sensor used	·        Glass thermometer ·        Thermocouple ·        Thermistor ·        Other (specify)	Thermistor
Atmospheric pressure	hPa	976.6
Freezing point °C	°C	<-17.4

RESULT:

The Freezing point ofdiphenyl sulphide (CAS No. 139-66-2)was determined usingcrushed ice-salt cooling bath.The time versus temperature curve (cooling curve) was drawn with the help ofmeasurement interface MicroLab FS-524.No freezing was observed up to -17.4°Cat 976.6 hPa.

 

Conclusions:

The Freezing point of diphenyl sulphide (CAS No. 139-66-2) was determined with crushed ice-salt cooling bath and it was determine to be < -17.4 °C at 976.6 hPa.

Executive summary:

The Freezing point determination of test item diphenyl sulphide (CAS No. 139-66-2) was done using crushed ice-salt cooling bath. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. No freezing was observed up to -17.4°C.Hence, the freezing point was inferred to be <-17.4°C at 976.6 hPa.

Description of key information

The Freezing point of diphenyl sulphide (CAS No. 139-66-2) was determined with crushed ice-salt cooling bath and it was determine to be < -17.4 °C at 976.6 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-17.4 °C

Additional information

The Freezing point determination of test item diphenyl sulphide (CAS No. 139-66-2) was done using crushed ice-salt cooling bath. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. No freezing was observed up to -17.4°C.Hence, the freezing point was inferred to be <-17.4°C at 976.6 hPa.

 

Based on the data from other supporting studies from various reliable sources such as handbooks [SAX (2012) and Merck Index (2015)], also suggests that, the freezing point of diphenyl sulphide was found to be in the range of -25.9˚C to -40˚C which is also in the range of key study value.

 

As the data from experimental study has K1 reliability which has the value of melting point as <-17.4°C at 976.6 hPa., thus considered as key study for the purpose of chemical safety assessment.