Prussian blue

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:

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

Qualifier:

according to guideline

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

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.