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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12-12-2017 – 12- 12-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Justification for type of information:
Experimental test result performed using standard OECD test guidelines.
Qualifier:
according to
Guideline:
other: as mentioned below
Principles of method if other than guideline:
The Freezing point determination of 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate(CAS No. 84051-
87-6) was done using crushed ice and salt. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath.
GLP compliance:
no
Type of method:
other: crushed ice and salt method (Freezing Temperature Method)
Specific details on test material used for the study:
- Name of test material: 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate
- IUPAC name: 2-[(E)-2-{4-[ethyl(2-hydroxyethyl)amino]phenyl}diazen-1-yl]-6-methoxy-3-methyl-1,3-benzothiazol-3-ium acetate
- Molecular formula: C21H26N4O4S
- Molecular weight: 430.5264 g/mole
- Smiles : CCN(CCO)c1ccc(cc1)/N=N/c2[n+](c3ccc(cc3s2)OC)C.CC(=O)[O-]
- Inchl: 1S/C19H23N4O2S.C2H4O2/c1-4-23(11-12-24)15-7-5-14(6-8-15)20-21-19-22(2)17-10-9-16(25-3)13-18(17)26-19;1-2(3)4/h5-10,13,
24H,4,11-12H2,1-3H3;1H3,(H,3,4)/q+1;/p-1
- Substance type: Organic
- Physical state: Liquid
Key result
Melting / freezing pt.:
< -10.4 °C
Atm. press.:
977.5 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: no other details mentioned

Observation Table & Result :

 Method Details    Observations
 Guideline  -  
 Method Freezing Temperature Method  
 Principle of method

 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

ml/g

 1 ml

 Type of cooling bath used

  1. Cold Water
  2. Crushed Ice
  3. Crushed Ice-Salt
  4. Dry Ice
  5. Other (specify)

 

Crushed Ice-

Salt

Type and model no. of temperature sensor used

  1. Glass thermometer
  2. Thermocouple
  3. Thermistor
  4. Other (specify)

Glass

thermometer

Atmospheric pressure

hPa

 977.5 hPa

 Freezing point °C

 °C

 less than -10.4°C

Conclusions:
The Freezing point determination of 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate(CAS No. 84051-87-6) was done using crushed ice and salt. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. The freezing point was determine to be less than -10.4°C at 977.5 hPa.
Executive summary:

The Freezing point determination of 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate(CAS No. 84051-87-6) was done using crushed ice and salt. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. The freezing point was determine to be less than -10.4°C at 977.5 hPa.

Description of key information

The Freezing point determination of 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate(CAS No. 84051-87-6) was done using crushed ice and salt. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. The freezing point was determine to be less than -10.4°C at 977.5 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-10.4 °C

Additional information

The Freezing point determination of 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate(CAS No. 84051-87-6) was done using crushed ice and salt. The determination was done on the basis of cooling curve (time vs temperature) obtained when the test item was placed in the cooling bath. The freezing point was determine to be less than -10.4°C at 977.5 hPa.