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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:
21-03-2018 – 21-03-2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard test guidelines
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The melting point determination of Test item prussian blue (CAS No. 14038-43-8 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block.
GLP compliance:
not specified
Type of method:
other: standard laboratory method
Test material information:
Composition 1
Specific details on test material used for the study:
- Name of test material: Prussian blue
- IUPAC name: C.I.Pigment Blue 27
- Molecular formula: C6FeN6.4/3Fe
- Molecular weight (if other than submission substance): 859.23 g/mol
- Smiles : [CH-](#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[CH-](#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[CH-]
(#N)[Fe+2]([CH-]#N)([CH-]#N)([CH-]#N)([CH-]#N)[CH-]#N.[Fe+3].[Fe+3].[Fe+3].[Fe+3]
- Inchi : 1S/18CN.7Fe/c18*1-2;;;;;;;/q18*-1;3*+2;4*+3
- Substance type: Inorganic
- Physical state: Solid powder (dark blue)
Key result
Decomposition:
yes
Decomp. temp.:
219.5 °C
Sublimation:
no
Remarks on result:
other: other details not available

 Method Details    Observations
 Guideline  OECD 102  
 Method  Capillary/metal block  
 Principle of method  

The temperature at which a

solid becomes a liquid at

standard atmospheric

pressure

 
 

Atmospheric

pressure

hPa   975 hPa
 Decomposition  

Decomposition temperature

(°C), if applicable

 Yes
 Sublimation  

Sublimation temperature

(°C), if applicable

NO 
 Mean Dec Point  °C

 219.5 Deg C

Conclusions:
The melting point determination of prussian blue (CAS No. 14038-43-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean decomposition temperature was determine to be 219.5°C at 975.0 hPa.
Executive summary:

The melting point determination of Test item prussian blue (CAS No. 14038-43-8 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The mean decomposition temperature was determine to be 219.5°C at 975.0 hPa.

Description of key information

The melting point determination of prussian blue (CAS No. 14038-43-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean decomposition temperature was determine to be 219.5°C at 975.0 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
219.5 °C

Additional information

The melting point determination of Test item prussian blue (CAS No. 14038-43-8 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The mean decomposition temperature was determine to be 219.5°C at 975.0 hPa.

Based on available data from handbook, the decomposition of Prussian blue in air was considered to be in the range 250–350°C

Other supporting study from another handbook, also suggested the Prussian blue was partially decomposes around 250°C, and this value is in the range of selected key value.