Registration Dossier

Administrative data

Description of key information

Key value for chemical safety assessment

Skin sensitisation

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not sensitising)
Additional information:

Animal data

Joseph (2003d) reported a GLP compliant guinea pig maximization test (according to OECD 406) on furfural (99.62% purity). The induction phase involved intradermal injections of 5% furfural in propylene glycol; then furfural was applied undiluted for the subsequent topical induction. At challenge, furfural was applied at a concentration of 25% in distilled water. Positive erythema skin reactions were observed in 3/20 treated animals 24 hours after challenge and in 2/20 after 48 hours. No positive responses were seen in controls animals. The sensitivity of the assay was confirmed using the positive control substance, 2-mercaptobenzothiazole. Furfural was not a skin sensitiser in this maximisation assay.

This study is supported by a Buehler assay reported by Kern (1997). This was a GLP and guideline compliant study; although no negative controls were used at induction phase. A group of 10 male and 10 female Hartley guinea pigs received undiluted furfural for both the induction and challenge phases. Very slight skin reactions were recorded at challenge but the reaction in test animals was not increased over that of control. Overall furfural was not a skin sensitiser in this assay.

Human data

Despite opportunities for skin exposure, there are no reliable reported cases of allergic contact dermatitis in humans. In a specific study involving regular medical exminations of employees at the Jugotanin plant in Slovenia (Medicinski Center, 1989), none of the employees had any skin changes which were considered to have been a consequence of daily contact with furfural.


Migrated from Short description of key information:
Two GLP compliant guideline guinea pig assays indicate furfural does not have skin sensitising potential. Despite opportunities for skin exposure, there are no reported cases of allergic contact dermatitis in humans.

Respiratory sensitisation

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not sensitising)
Additional information:

There is no reported evidence of respiratory tract sensitisation in use.


Migrated from Short description of key information:
There is no reported evidence of respiratory tract sensitisation in use.

Justification for classification or non-classification

Furfural is concluded not to warrant classification under DSD or CLP for potential skin or respiratory sensitisation.