2-(ethylnitroamino)ethyl nitrate

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05 November 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

method to determine freezing temperature

Key result

Melting / freezing pt.:

< -20 °C

Remarks on result:

other: Test performed at atmospheric pressure although not specific value reported. For both samples the temperature was decreased to the level below -20°C and the freezing point was not reached.

Table 1. Measurements of Et-NENA (Ethyl-2-nitratoethylnitramine) freezing point

Sample No. 1		Sample No. 2
Time[min]	Sample temperature [^oC]	Time[min]	Sample temperature [^oC]
0	-5,0	0	-5,0
1	-5,5	1	-5,4
2	-6,0	2	-5,7
3	-6,4	3	-6,2
4	-6,8	4	-6,8
5	-7,3	5	-7,4
6	-7,9	6	-7,9
7	-8,4	7	-8,3
8	-8,8	8	-8,6
9	-9,2	9	-8,9
10	-9,5	10	-9,4
11	-9,8	11	-10,1
12	-10,1	12	-10,7
13	-10,5	13	-11,1
14	-10,8	14	-11,6
15	-11,2	15	-12,0
16	-11,7	16	-12,4
17	-12,0	17	-12,8
18	-12,5	18	-13,1
19	-12,9	19	-13,4
20	-13,2	20	-13,7
21	-13,6	21	-14,0
22	-13,9	22	-14,3
23	-14,2	23	-14,7
24	-14,4	24	-15,2
25	-14,7	25	-15,5
26	-15,1	26	-16,0
27	-15,2	27	-16,3
28	-15,5	28	-16,5
29	-15,9	29	-16,8
30	-16,3	30	-16,9
31	-16,5	31	-17,3
32	-17,0	32	-17,8
33	-17,3	33	-18,3
34	-17,8	34	-18,8
35	-18,3	35	-19,2
36	-18,6	36	-19,5
37	-19,1	37	-20,0
38	-19,7	38	-20,5
39	-20,5	39	-20,8
40	-20,6	40	-21,2
41	-21,0	41	-21,8

Conclusions:

The freezing point of Et-NENA has not been reached up to -20ºC.

Executive summary:

A study to determine the freezing point of Et-NENA was conducted in accordance to OECD (102)/EU. A.1 guidelines by the method of crystallization tube in freezing mixture solid CO2/acetone, in GLP conditions. The liquid sample of Et-NENA was poured into a test tube. This tube was placed in an outer tube and set in a Dewar vessel containing freezing mixture. The test item was stirred and the temperature was recorded during cooling. Two measurements were carried out at atmospheric pressure. The freezing point of Et-NENA has not been reached up to the limit of -20°C, which defines a threshold of the freezing point study performance necessity.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Qualifier:

according to guideline

Guideline:

other: National Military Standard of China, Explosive Test Method GJB 772A-97, 1997

GLP compliance:

not specified

Key result

Melting / freezing pt.:

>= 2 - <= 4 °C

Decomposition:

no

Sublimation:

no

Conclusions:

The freezing point of the test item was determined to be between 2 and 4ºC.

Executive summary:

The study to determine the freezing point of the test item was performed according to the GJB772A-1997 standard. The freezing point was determined to be between 2 and 4ºC.

Reference 3

Endpoint:

melting point/freezing point

Type of information:

other: review article

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Principles of method if other than guideline:

Not specified.

GLP compliance:

not specified

Key result

Melting / freezing pt.:

>= 1 - <= 5 °C

Decomposition:

no

Sublimation:

no

Conclusions:

The freezing point of the test item is between 1 and 5ºC.

Executive summary:

The freezing point of the test item is between 1 and 5ºC.

Description of key information

Key study. Method according to OECD 102 / EU Method A.1, GLP study. The freezing point of Et-NENA has not been reached up to -20ºC.

Supporting study. Method according to the GJB772A-1997 standard. The freezing point of the test item was determined to be between 2 and 4ºC.

Supporting study. Secondary literature. The freezing point of the test item is between 1 and 5ºC.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-20 °C

Additional information

Key study: A study to determine the freezing point of Et-NENA was conducted in accordance to OECD (102)/EU. A.1 guidelines, in GLP conditions. The freezing point of Et-NENA was not reached up to -20°C. According to column 2 of REACH Annex VII, the study does not need to be conducted below a lower limit of – 20°C.