Naphtha (Fischer-Tropsch), light, C4-10-branched and linear

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

August 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not effect the quality of the relevant results.

Qualifier:

according to guideline

Guideline:

other: Distillation of Petroleum products at atmospheric pressure method , ASTM D 86 ü 04b

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Principles of method if other than guideline:

The initial determination of the boiling point range was determined using the distillation method according to the EC Directive 92/69/EEC A.2 Boiling Temperature. However, it was considered by the test laboratory that this was not appropriate for test materials of this nature. Therefore, the boiling point range was determined using the ASTM D 86 method (non-GLP). This method uses specific apparatus that controls heating rate, temperature of the condenser and temperature of the collection vessel.
The main differences between the ASTM D 86 method and the EU Method A.2 is that ASTM D 86 uses specific apparatus that controls the heating rate, temperature of the condenser and temperature of the collection vessel. These parameters are very specific for a particular petroleum product type
and can have a significant effect on the boiling temperatures obtained.

GLP compliance:

no

Remarks:

no GLP compliance for ASTM D 86 Method, but GLP compliance (incl. certificate) for EU Method A.2

Type of method:

distillation method

Boiling pt.:

62 - 181 °C

Atm. press.:

100.8 kPa

1) The results of the duplicate determinations of the inappropriate EU method A.2 (at atmospheric pressure) are shown in the following tables:

- Determination 1:

Vapour Temperature		Observations
[K]	[°C]
298	25	Test material was observed to be a clear, colourless liquid
301	28	Test material boiling vigorously, vapour reaching side arm
334	61	First drop of clear, colourless distillate collected
338	65	1 ml of clear, colourless distillate collected
343	70	2 ml of clear, colourless distillate collected
346	73	3 ml of clear, colourless distillate collected
349	76	4 ml of clear, colourless distillate collected
351	78	5 ml of clear, colourless distillate collected
361	88	10 ml of clear, colourless distillate collected
373	100	20 ml of clear, colourless distillate collected
377	104	25 ml of clear, colourless distillate collected
380	107	30 ml of clear, colourless distillate collected
390	117	35 ml of clear, colourless distillate collected
404	131	40 ml of clear, colourless distillate collected
413	140	45 ml of clear, colourless distillate collected
369	96	48 ml of clear, colourless distillate collected. Vapour temperature continued to decrease from an observed maximum of 414 K

Boiling temperature range: 334 to 414 ± 0.5 K (61 to 141°C)                                   

Atmospheric pressure:      101.53 kPa

- Determination 2:

Vapour Temperature		Observations
[K]	[°C]
298	25	Test material was observed to be a clear, colourless liquid
303	30	Test material boiling vigorously, vapour reaching side arm
332	59	First drop of clear, colourless distillate collected
341	68	1 ml of clear, colourless distillate collected
344	71	2 ml of clear, colourless distillate collected
348	75	3 ml of clear, colourless distillate collected
352	79	4 ml of clear, colourless distillate collected
355	82	5 ml of clear, colourless distillate collected
364	91	10 ml of clear, colourless distillate collected
378	105	20 ml of clear, colourless distillate collected
383	110	25 ml of clear, colourless distillate collected
388	115	30 ml of clear, colourless distillate collected
390	117	35 ml of clear, colourless distillate collected
403	130	40 ml of clear, colourless distillate collected
414	141	45 ml of clear, colourless distillate collected
427	154	48 ml of clear, colourless distillate collected. Vapour temperature continued to decrease from an observed maximum of 414 K

 

Boiling temperature range: 332 to 427±0.5 K (59 to 154°C)

Atmospheric pressure:    101.55 kPa

Overall result: Overall boiling temperature range 332 to 427 ± 0.5 K (59 to 154°C) at 101.53 to 101.55 kPa

2) The results of the determination of the ASTM D 86 method (at atmospheric pressure) are shown in the following table:

Test Material recovered [%]	Temperature [°C]
IBP	61.8
2	78.7
4	83.7
6	86.9
8	89.4
10	92.5
20	103.6
30	112.3
40	120.3
50	125.3
60	136.3
70	142.6
80	150.4
90	159.7
FBP	181.3

IBP: initial boiling point; FBP: final boiling point

- Percent recovery: 96.6%

- Percent residue: 1.4%

- Total recovery: 98.0%

- Atmospheric Pressure: 100.8 kPa

Conclusions:

The data generated by the inappropriate Distillation Method of Annex V gave results 59 to 154°C at 101.53 to 101.55 kPa.
The determination using the ASTM D86-method gave a boiling temperature range of 335 to 454 K (62 to 181°C) at 100.8 kPa.

Executive summary:

The boiling temperature was determined using the distillation method at atmospheric pressure, EU Method A.2. This method was not appropriate for test materials of this nature; therefore, the data (which gave results 59 to 154°C at 101.53 to 101.55 kPa) is to be used as supporting data as this is the method referenced in Annex V.

The determination of boiling temperatures for petroleum products uses a specific method (IP 123 Petroleum Products - Determination of Distillation Characteristics), which is referenced in ASTM D 86, Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure.

The overall definitive boiling temperature range is to be quoted using the results of Method ASTM D 86: it gave a boiling temperature range of 335 to 454 K (62 to 181°C) at 100.8 kPa.

Description of key information

The boiling point has been determined by two different methods using:
- the distillation method at atmospheric pressure, Method A2 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC) and
- the Distillation of Petroleum Products at Atmospheric Pressure method, ASTM D 86 - 04b.
The overall boiling temperature range is to be quoted using the results obtained following Method ASTM D 86:
335 to 454 K (62 to 181°C) at 100.8 kPa.

Additional information

The boiling temperature was determined using the distillation method at atmospheric pressure, EU Method A.2. This method was not appropriate for test materials of this nature; therefore, the data (which gave results 59 to 154°C at 101.53 to 101.55 kPa) is to be used as supporting data as this is the method referenced in Annex V.

The determination of boiling temperatures for petroleum products uses a specific method (IP 123 Petroleum Products - Determination of Distillation Characteristics), which is referenced in ASTM D 86, Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure.

The overall definitive boiling temperature range is to be quoted using the results of Method ASTM D 86: it gave a boiling temperature range of 335 to 454 K (62 to 181°C) at 100.8 kPa.