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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
oxidising solids
Type of information:
other: statement
Adequacy of study:
key study
Study period:
May 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The EU method was followed and UN guidance considered. Based on the molecular structure and composition of the test substance a statement rather than a full study was considered sufficient to cover this endpoint.
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Principles of method if other than guideline:
REACH guidance with regards to oxidising properties was applied:

A study does not need to be conducted if:
• the substance is explosive; or
• the substance is highly flammable; or
• the substance is an organic peroxide; or
• the substance is incapable of reacting exothermically with combustible materials, for example on the basis of the chemical structure (e.g. organic substances not containing oxygen or halogen atoms and these elements are not chemically bonded to nitrogen or oxygen, or inorganic substances not containing oxygen or halogen atoms).

A full test does not need to be conducted for solids if any preliminary evaluation clearly indicates that the test substance has oxidising properties.

For organic substances only, an Oxygen Balance (OB) calculation may be useful as a criteria combined with an examination of the chemical structure as a means of predicting oxidizing properties. The oxygen balance is calculated from the empirical formula of a compound in percentage of oxygen required for complete conversion of carbon to carbon dioxide, hydrogen to water, and metal to metal oxide.
GLP compliance:
not specified
Sample tested:
other: not specified (migrated information)
Parameter:
other: not specified (migrated information)
Remarks on result:
other: result not specified (migrated information)
Remarks:
statement based on evaluation of structural features and oxygen balance value: no oxidising properties

Oxygen Balance (OB) Calculator:

OB% = -1600/Mol.wt of substance x (2X + (Y/2) + M-Z)

X = number of atoms of carbon, Y = number of atoms of hydrogen, Z = number of atoms of oxygen, and M = number of atoms of metal (metallic oxide produced).

OVERALL SUMMARY

Substance Name:2,5-di-tert-pentylhydroquinone

CAS No: 79 -74 -3

EINECS / ELINCS No: 201 -222 -2

Structural Alerts: None

Oxygen Balance Value:-274.78

Potential Oxidant?: No

Based on the chemical structure and oxygen balance value of the substance of interest, it is deemed not to be potentially oxidising.

Interpretation of results:
GHS criteria not met
Conclusions:
Based on the evaluation of the chemical structure and oxygen balance value of the substance of interest, it is deemed not to be potentially oxidising.

Description of key information

Based on the evaluation of the chemical structure and oxygen balance value of the substance of interest, it is deemed not to be potentially oxidising.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

The EU method was followed and UN guidance considered. Based on the molecular structure and composition of the test substance a statement rather than a full study was considered sufficient to cover this endpoint.

Justification for classification or non-classification

Based on the above mentioned result, classification according to the CLP Regulation (EC) 1272/2008 and the Dangerous Substance Directive 67/548/EC is not considered necessary.