Chromium hydroxide sulphate

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the melting point is above 300°C

Justification for type of information:

In common with other inorganic salts, there is not considered to be a measurable vapour pressure

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

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:

Using recognised methods described incompany report. This also corrolates with published data suggesting no melting point < 300 C

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Principles of method if other than guideline:

Melting point estimate was carried out using a Maplelab Scientific Melting Point Device MPD02 up to 300 C
A further sample was heated in a carbolite furnace to 900 C (after which it has changed to a dark ash, therefore decomposition had occurred)

GLP compliance:

no

Type of method:

capillary method

Specific details on test material used for the study:

Batch number of test material: A-09-03021

Key result

Melting / freezing pt.:

> 300 °C

Atm. press.:

ca. 1 atm

Decomposition:

yes

Remarks:

Above 300 C and below 900 C

Decomp. temp.:

> 300 - < 900 °C

Sublimation:

no

Substance does not melt .The substance decomposes > 300 C.

The MPD02 equipment could only go up to 300 C and at this temperature no physical or colouration changes were observed in the crystalline sample placed in the glass capillary tube.

A 1 g sample was heated in a carbolite furnace to 900 C after which it has changed to a dark ash, therefore decomposition had occurred.

Conclusions:

Results: Substance does not melt .The substance decomposes >300 °C.

During normal use and handling, and certainly under biological and environmental conditions, the substance will remain solid.