Vanadium tetrachloride

Hydrolysis

Administrative data

Endpoint:

hydrolysis

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Operating and technical experience of the producer

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Principles of method if other than guideline:

Daily manipulation of the substance by the producer

GLP compliance:

no

Remarks:

Routine test in the laboratory

Test material

Test material information

Constituent 1

Reference substance name:

Vanadium tetrachloride

EC Number:

231-561-1

EC Name:

Vanadium tetrachloride

Cas Number:

7632-51-1

Molecular formula:

Cl4V

IUPAC Name:

vanadium tetrachloride

Test material form:

solid: particulate/powder

Specific details on test material used for the study:

Source/ batch : quality control one a week

Radiolabelling:

no

Study design

Analytical monitoring:

no

Details on sampling:

Not applicable

Buffers:

Not applicable

Duration of test

Duration:

1 h

pH:

7

Temp.:

20 °C

Number of replicates:

Not applicable

Positive controls:

no

Negative controls:

no

Statistical methods:

Not applicable

Results and discussion

Preliminary study:

No pertient

Test performance:

No pertient

Transformation products:

yes

Identity of transformation products

Identity of transformation products 1

No.:

#1

Reference

Reference substance name:

Unnamed

IUPAC name:

hydrochloric acid

Identifier:

common name

Identity:

hydrochloric acid

Identity of transformation products 2

No.:

#2

Reference

Reference substance name:

Unnamed

IUPAC name:

dichloro(oxo)vanadium

Inventory number:

InventoryMultipleMappingImpl [inventoryEntryValue=EC 233-517-7]

CAS number:

10213-09-9

Molecular formula:

Cl2OV

Molecular weight:

ca. 173.3

SMILES notation:

O=[V+2].[Cl-].[Cl-]

InChl:

InChI=1S/2ClH.O.V/h2*1H;;/q;;;+2/p-2

Details on hydrolysis and appearance of transformation product(s):

When manipulate in laboratory and exposed to humidity of air, VCl4 decomposes instantenaously producing change in colour (brown to blue) of the product and in pH (<2)

Total recovery of test substance (in %)

Remarks on result:

not determinable

Dissipation DT50 of parent compound

pH:

2

Temp.:

20 °C

DT50:

< 1 h

Applicant's summary and conclusion

Validity criteria fulfilled:

not applicable

Conclusions:

When exposed to humidity of air, VCl4 instantaneously decomposes in VOCl2 and HCl, following the equation:
2VCl4 + 2H2O => 2VOCl2 + 4HCl
and then
2VOCl2 + 2H2O => V2O4 + 4HCl

This reaction is verified weekly in a laboratory by the color change when VCl4 is exposed to the air (brown to blue).
Testing for hydrolysis is then technically impossible and scientifically unjustified: instantaneous decomposition of VCl4 in presence of humidity of air do not allow hydrolysis testing.

Executive summary:

When exposed to humidity of air, VCl4 instantaneously decomposes in VOCl2 and HCl, following the equation:

2VCl4 + 2H2O => 2VOCl2 + 4HCl

and then

2VOCl2 + 2H2O => V2O4 + 4HCl

This reaction is verified weekly in a laboratory by the color change when VCl4 is exposed to the air (brown to blue).

Testing for hydrolysis is then technically impossible and scientifically unjustified: instantaneous decomposition of VCl4 in presence of humidity of air do not allow hydrolysis testing.