[No public or meaningful name is available]

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From February 28, 2019 to May 13, 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: HJ/T 153-2004 "The Guidelines for the Testing of chemicals. Physical-Chemical Properties and Physical Hazards(second edition", No.104

GLP compliance:

yes (incl. QA statement)

Type of method:

static method

Test material

Test material information

Constituent 1

Reference substance name:

Sulfonic Acids, C18-alkane hydroxyl and C18-alkene, potassium salts

Cas Number:

2210238-56-3

IUPAC Name:

Sulfonic Acids, C18-alkane hydroxyl and C18-alkene, potassium salts

Test material form:

solid

Remarks:

Color: White to pale yellow This sample was obtained from the original liquid form by removing water.

Specific details on test material used for the study:

-Storage conditions
Store container tightly closed in well-ventilated place. Store in corrosive resistant container with a resistant inliner. Store locked up. Don't store with acids.

-Test item stability under storage conditions
Stable in container after opening. Stable in water and in light. Stability in soil is not applicable.

Results and discussion

Vapour pressure

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.79 Pa

Any other information on results incl. tables

Calculation of C, D

Plotting lgP_T against lgV_T, C=9.6072, D=2.4611. The relationship curve was obtained as shown in Figure 1:

The Vapour Pressure of test substance under test temperature

Plotting lg P_T against 1/T, the relationship curve was obtained as shown in Figure 2:

According to LgP_T against 1/T Relationship Curve, it was calculated that at 20°C: P=0.79 Pa.

Applicant's summary and conclusion

Conclusions:

The vapor pressure of the registered substance was determined to be 0.79 Pa at 20ºC.

Executive summary:

Objective

Determining the Vapour Pressure of C18K to provide data for environmental assessment.

Test guideline

HJ/T 153-2004 "The Guidelines for the Testing of chemicals. Physical-Chemical Properties and Physical Hazards(second edition", No.104.

Test conditions

In order to calculate evaporation rate, Isothermal Thermo Gravimetric Analysis (TGA) was applied to determine the weight loss of test substance at constant  temperature of 20°C, 30°C, 40°C, 50°C, 60°C, 70°C and 80°C in a 10 mins period by TG. The vapour pressure of C18K corresponding temperature was calculated by utilizing the relationship ratio of evaporation rate and vapour pressure of benzoic acid.

Results

It was extrapolated by utilizing the relationship of logarithm of vapour pressure and reciprocal of temperature that the vapour pressure of C18K at 20°C was 0.79 Pa.