Hexahydro-2H-azepin-2-one, sodium salt

Additional physico-chemical information

Administrative data

Endpoint:

other: buffer capacity

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2013

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: Young et al.

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: German TRGS 200, Annex I

Principles of method if other than guideline:

Determination of the alkaline or acidic reserve (buffer capacity) of a substance

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Hexahydro-2H-azepin-2-one, sodium salt

EC Number:

218-336-3

EC Name:

Hexahydro-2H-azepin-2-one, sodium salt

Cas Number:

2123-24-2

Molecular formula:

C6H11NO.Na

IUPAC Name:

sodium 2-oxoazepan-1-ide

Results and discussion

Results:

For sodium caprolactamat, the alkaline reserve was determined to be 5.13g (NaOH).

With this value, an estimation of the corrosive potential of the substance can be performed:
A substance has to be considered as corrosive, if the sum of the pH value and 1/12 of the alkaline reserve is higher than 14.5.

For sodium caprolactamat, this calculation results in 13.1 + 1/12*5.13 = 13.5

As this value is lower than 14.5, the substance would not have to be conisdered as "corrosive".

Applicant's summary and conclusion

Conclusions:

Although the determination of the alkaline reserve according to Young. would not result in a classification as "corrosive", the classification is applied as the pH value of the substance itself is 13.1 which is already higher than 11.5.