2-Propenenitrile, polymer with 1,2-ethanediamine

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

Although done to a recognised screening test method, the nature of this UVCB substance means that only the the most volatile constuent will have been measured; in the case of this reaction product, it is likely that unreacted starting materials may contribute to the findings.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

Dynamic method

GLP compliance:

no

Type of method:

effusion method: isothermal thermogravimetry

Test no.:

#1

Temp.:

ca. 20 °C

Vapour pressure:

ca. 644 Pa

Use of ebulliometer, with the temperature stabilised at 107 C. Calculated back for 20 C

Conclusions:

Although done to a recognised screening test method, the nature of this UVCB substance means that only the the most volatile constuent will have been measured; in the case of this reaction product, it is likely that low molecular weight components will contribute to the findings. However, the smallest identified component has an estimated vapour pressure of < 10 Pa.

Although it was attempted to remove water, the 'dried' sample will have residual residual water and this is th emost likely reason for the higher than expected vapour pressure.

A very large proportion of the components have molecular weights in excess of 200 and a review of vapour pressure data suggests < 0.1 Pa can be expected; however, the same modelling and assessment suggest that the product should be solid (this makes the presence of significant levels of water or liquid amines acting as solvent).

A figure of 644 Pa is considered high for the CSR and a more conservative figure of 1 Pa is used.

Description of key information

Although done to a recognised screening test method, the nature of this UVCB substance means that only the the most volatile constituent will have been measured; in the case of this reaction product, it is likely that low molecular weight components will contribute to the findings. However, the smallest identified component has an estimated vapour pressure of < 10 Pa.

Although it was attempted to remove water, the 'dried' sample will have residual water and this is the most likely reason for the higher than expected vapour pressure.

A very large proportion of the components have molecular weights in excess of 200 and a review of vapour pressure data suggests < 0.1 Pa can be expected; however, the same modelling and assessment suggest that the product should be solid (this makes the presence of significant levels of water or liquid amines acting as solvent as the likely cause for the relatively high vapour pressure actually measured).

A figure of 644 Pa is considered high for the CSR and a more conservative figure of 1 Pa is used.

Key value for chemical safety assessment

Vapour pressure:

1 Pa

at the temperature of:

20 °C