Manganese ferrite black spinel

Density

Link to relevant study record(s)

Reference

Endpoint:

density

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Basic data given

Qualifier:

according to guideline

Guideline:

other: DIN EN ISO 787-10:1995

Deviations:

no

GLP compliance:

not specified

Type of method:

other: no data

Type:

density

Density:

ca. 4.6 other: g/mL

Temp.:

20 °C

Remarks on result:

other: It is assumed that the value refers to a temperature of 20°C.

Executive summary:

In the product information a density of approximately 4.6 g/mL is reported. The test method was DIN EN ISO 787 -10:1995.

Description of key information

The relative density of manganese ferrite is 4.6 g/mL. The test method was DIN EN ISO 787 -10:1995.

Key value for chemical safety assessment

Relative density at 20C:

4.6

Additional information

The result is given as density in unit g/mL. The relative density was calculated according to the following definition.

The relative density D²⁰₄ of solids or liquids is the ratio between the mass of the substance, determined at 20°C, and the mass of the same volume of water, determined at 4°C. At this temperature the density of water is 0.999975 g/mL.

To convert the density to relative density the following formula is used:

D²⁰₄= p_Substance(20°C) / p_Water(4°C)

The relative density has no dimension.

There is only one data from a poorly documented source available for manganese ferrite, read across with diiron trioxide, triiron tetraoxide and iron hydroxide oxide is proposed to support this endpoint. The substances are members of the ”Iron Oxides Category”. In regard to structure, physicochemical properties, environmental fate characteristics, ecotoxicity and toxicity, the grouping of diiron trioxide, triiron tetraoxide, iron hydroxide oxide, iron manganese trioxide, manganese ferrite, and zinc ferrite in the "Iron Oxides Category" is justified. Therefore, a read across between these substances to support physico-chemical endpoints for iron manganese trioxide is justified. The density of the following iron oxides is reported: Diiron trioxide 5.25 kg/L; Triiron tetraoxide 5.17 kg/L; Iron hydroxide oxide 4.26 kg/L. From the average of the three stated oxide the density of manganese ferrite was estimated to be ca. 5 g/cm³ at ca. 25°C.