Heptane

Phototransformation in air

Link to relevant study record(s)

Reference

Endpoint:

phototransformation in air

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Acceptable, well documented publication which meets basic scientific principles

Justification for type of information:

A discussion and report on the read across strategy is given as an attachment in IUCLID Section 13.

Reason / purpose for cross-reference:

read-across: supporting information

Principles of method if other than guideline:

Review data with no special reference to the methods used in the experiments

GLP compliance:

no

Estimation method (if used):

PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 500000 molecule/cm³
- Temperature for which rate constant was calculated: 298 (±20) Deg K

Light source:

not specified

Key result

% Degr.:

50

Sampling time:

3.7 d

Transformation products:

not specified

Rate constant cm3 • molecule^-1• s^-1: 8.72 x 10 ^-12

The half-life of n-octane, normalized to a 12-hour day, is 3.68 days, based on 12-hour light / 12-hour dark periods and an concentration of 5E5. The half-life is normalized to a 12-hour day because atmospheric oxidation reactions only take place in the presence of sunlight.

Validity criteria fulfilled:

not applicable

Conclusions:

The half-life of n-octane, normalized to a 12-hour day, is 3.7 days, based on 12-hour light / 12-hour dark periods and an OH- concentration of 5E5. The half-life is normalized to a 12-hour day because atmospheric oxidation reactions only take place in the presence of sunlight.

Executive summary:

The half-life of n-octane, normalized to a 12-hour day, is 3.7 days, based on 12-hour light / 12-hour dark periods and anconcentration of 5E5. The half-life is normalized to a 12-hour day because atmospheric oxidation reactions only take place in the presence of sunlight.

Description of key information

There is no data available for this substance. However, key data is available for structural analogue, Octane and presented in the dossier. The data is read across to this substance based on analogue read across and a discussion and report on the read across strategy is provided as an attachment inIUCLID Section 13.

The half-life of n-octane, normalized to a 12-hour day, is 3.7 days, based on 12-hour light / 12-hour dark periods and anconcentration of 5E5. The half-life is normalized to a 12-hour day because atmospheric oxidation reactions only take place in the presence of sunlight.