[3-(2,3-epoxypropoxy)propyl]dimethoxymethylsilane

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

according to the EEC regulation No. 440/2008

GLP compliance:

no

Other quality assurance:

ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

6 mm orifice

Value:

6

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

2 mm orifice

Value:

2

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Mechanical shock sensitivity

None of the six single tests with an impact energy of 40 J showed any sparking or exploding. Therefore the test series using impact energies of 7.5 J were not necessary. No impact sensitivity of the test item was observed.

Thermal sensitivity

Using the 6 mm orifice after 73-75 s the start of a reaction was observed in the single tests (yellow coloured flame of about 1.5 m height above the tube and escaping of the test substance). The reaction lasted 65-67 s. After about 170 s the bottom of the steel tubes became glowing red. The burners were turned off after 5 minutes. After cooling down it was observed that all the tubes were unchanged.

Using the 2 mm orifice after 67-69 s the start of a reaction was observed in the single tests (yellow coloured flame of about 1.5 m height above the tube and escaping of the test substance connected with a noisy sound). The reaction lasted 65-66 s. After about 170 s the bottom of the steel tubes became glowing red. The burners were turned off after 5 minutes. After cooling down it was observed that all the tubes were unchanged.

Interpretation of results:

GHS criteria not met

Conclusions:

The substance was reported not to be an explosive hazard, determined in a reliable study conducted according to an appropriate test protocol. No further details are available.

Description of key information

Explosiveness: Non explosive (EU Method A.14)

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

No explosivity data are available for [3-(2,3-epoxypropoxy)propyl]dimethoxy(methyl)silane (CAS No. 65799-47-5, target substance), therefore reliable data for the analogue substance [3-(2,3-epoxypropoxy)propyl]trimethoxysilane (CAS No. 2530-83-8, source substance) has been read-across.

[3-(2,3-Epoxypropoxy)propyl]trimethoxysilane was found to be not explosive in a reliable standard study conducted in accordance with EU Method A.14. The calculated oxygen balance of [3-(2,3-epoxypropoxy)propyl]dimethoxy(methyl)silane was -189 and that of its structural analogue was -156. The source substance has the smallest negative oxygen balance (greatest potential to show explosive properties) compared to the target substance. Both substances are alkoxysilanes with the same [3-(2,3-epoxypropoxy)propyl side chain. The difference is that the target substance is a dimethoxy(methyl)silane and the source substance is a trimethoxysilane. The potential for explosive properties is associated with the epoxide group in the side chain. This group is the same for both the source substance and target substance. The alkoxysilane groups are structurally similar, not associated with explosive properties and remote from the epoxide group. Therefore, it is considered relevant to read-across the negative result from the source substance to the target substance.

Justification for classification or non-classification

There is no evidence that the substance should be classified for this endpoint.