Reaction mass of 1,2-dichloropropane and 3-chloropropene and 3,3-dichloropropene

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

October 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study performed according to relevant tests guidelines under GLP conditions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Reference

Name:

Unnamed

Type:

Constituent

Type:

Constituent

Type:

Constituent

Details on test material:

Identification 1,2-Dichloropropane 75
Molecular formula C3H6Cl2
Molecular weight 112.99
CAS Number 78-87-5
Description Clear grey liquid (determined at NOTOX)
Batch RBA100720A (taken from label)
Purity CAS Number
>=65 - <= 80% 1,2-Dichloropropane 78-87-5
>= 8 - <= 20% 2,3-Dichloropropene 78-88-6
>=10 - <= 13% 1,1-Dichloropropene 563-58-6
>= 9 - <= 18% 1,3-Dichloropropene 542-75-6
>= 1 - <= 3% 3-Chloropropene 107-05-1
<= 0.3% Benzene 71-43-2
Test substance storage In refrigerator (2-8°C) protected from light
Stability under storage conditions Stable
Expiry date 23 July 2011 (allocated by NOTOX, 1 year after receipt of the test substance)

Study specific test substance information:
Test substance handling Use amber-coloured glassware or wrap container in tin-foil.

Results and discussion

Boiling point

Boiling pt.:

93 °C

Atm. press.:

1 016 hPa

Any other information on results incl. tables

 Preliminary test

From 75°C upwards the weight of the sample decreased significantly. At 87°C the sample weight had decreased by 25%.

 

After the experiment, a red/brown residue was observed on the lid of the sample container and black residue remained in the sample container (original colour:grey). The change of the colour indicated reaction and/or decomposition of the test substance.

 

  Main study

A strong endothermic peak between 50°C and 125°C was observed. The extrapolated onset temperature of the peak was 92.63°C. The effect was most likely obtained due to evaporation of the test substance. After the experiment it was observed that the test substance was evaporated from the sample container.

 

To investigate the evaporation peak between 50°C and 125°C a closed sample container was applied in the second experiment. During heating an exothermic effect between 100°C and 150°Cwas found. The effect was possibly obtained due to polymerization of components of the test substance. Because the effect was shifted to higher temperatures it was most likely that the endothermic effect of the first experiment is the boiling point of the test substance. After the experiment, a black residue was observed on the lid of the sample container and black residue remained in the sample container.

 

The third experiment was performed to determine the duplicate boiling temperature of the test substance. Similar results as with the first experiment were obtained. The extrapolated onset of the evaporation peak was 93.56°C.After the experiment it was observed that the test substance was evaporated from the sample container.

 

With none of the experiments during cooling, effects that could be related to crystallization of the test substance were observed. It demonstrated that the melting point of the test substance is significantly below -25°C (248K).

Applicant's summary and conclusion

Conclusions:

The thermal stability, the boiling temperature of the reaction mass containing mainly 1,2-Dichloropropane was determined using DSC. The boiling temperature of the test substance is: 93°C or 366K.

The atmospheric pressure was 1016 ± 1 hPa.