1-butyl-2,3-dicyclohexyl-1-methylguanidine

pH

Administrative data

Endpoint:

pH

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28/04/2009 to 05/08/2009

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The measurements were conducted according to CIPAC methods, and under GLP. However, restrictions are proposed because calibration results are not provided.

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 75.3 (pH)

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 191 (acidity/alkalinity)

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Results and discussion

pH value

pH value:

12.4

Temp.:

21 °C

Concentration:

ca. 10 g/L

Remarks on result:

other: saturated solution

Any other information on results incl. tables

pH Value

pH value of Test Item in saturated aqueous solution (about 10 g/L)

Sample ID	Equilibration Time [min]	pH	Temperature [°C]	Mean pH
P7	1	12.39	20.7	12.41
P8	1	12.42	20.8

Alkalinity

Titer of 0.1 M Hydrochloric Acid

Sample ID	Weight of sodium carbonate [mg]	Theoretical consumption [mL]	Experimental consumption [mL]	Titer	Mean Titer
1	78.51	14.815	14.035	1.0555	1.0572
2	84.3	15.907	15.030	1.0584
3	75.84	14.311	13.529	1.0578

Alkalinity expressed as NaOH [% w/w] (concentration of test solution: 3.7 g/L)

Sample ID	Weight of test item [mg]	Consumption of HCl [mL]	Concentration of HCl [mol/L]	Titer	Alkalinity [%w/w]	Mean Alkalinity [%w/w]
1	0.37893	12.266	0.1	1.0572	13.6925	13.5997
2	0.38923	12.542			13.6301
3	0.37433	11.926			13.4765

Applicant's summary and conclusion

Conclusions:

pH = 12.4 (saturated solution at 21°C)
Alkalinity = 13.6 %w/w NaOH (at 25°C)
This data can be relevant for classification regarding corrosive properties.

Executive summary:

The pH of a saturated solution (10 g/L) of the test substance in deionised water was measured according to CIPAC MT75.3 guideline, using a pH-meter and a glass electrode, under GLP. As the result was above 10, the free alkalinity was also determined, according to CIPAC MT191 guideline, on a dilute solution (3.7 g/L).